HighCVE-2026-50256

Red Hat Enterprise Linux: Stack-based Buffer Overflow (CVE-2026-50256)

Published 05.06.2026Last modified 05.08.2026Sources: Debian LTS, BSI, Debian, Msrc Update Guide, CVE.org

What is affected, what to do

Update Red Hat Enterprise Linux 10 to version 0:24.1.9-4.el10_2.2, Red Hat Enterprise Linux 10.0 Extended Update Support to version 0:24.1.5-6.el10_0.1, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION to version 0:1.1.0-25.el6_10.18.

Affected: Red Hat Enterprise Linux 10 lt *..0:24.1.9-4.el10_2.2
Red Hat Enterprise Linux 10.0 Extended Update Support lt *..0:24.1.5-6.el10_0.1
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION lt *..0:1.1.0-25.el6_10.18
Red Hat Enterprise Linux 7 Extended Lifecycle Support lt *..0:1.20.4-35.el7_9
Red Hat Enterprise Linux 7 Extended Lifecycle Support lt *..0:1.8.0-36.el7_9.5
Red Hat Enterprise Linux 8 lt *..0:21.1.3-20.el8_10.2
Red Hat Enterprise Linux 8 lt *..0:1.20.11-28.el8_10.2
Red Hat Enterprise Linux 8 lt *..0:1.15.0-10.el8_10
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support lt *..0:1.20.10-5.el8_4
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support lt *..0:1.11.0-8.el8_4.16
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On lt *..0:1.20.10-5.el8_4
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On lt *..0:1.11.0-8.el8_4.16
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support lt *..0:1.20.11-8.el8_6
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support lt *..0:21.1.3-2.el8_6.7
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support lt *..0:1.12.0-6.el8_6.18
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On lt *..0:1.20.11-8.el8_6
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On lt *..0:21.1.3-2.el8_6.7
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On lt *..0:1.12.0-6.el8_6.18
Red Hat Enterprise Linux 8.8 Telecommunications Update Service lt *..0:1.20.11-19.el8_8
Red Hat Enterprise Linux 8.8 Telecommunications Update Service lt *..0:21.1.3-13.el8_8.1
Red Hat Enterprise Linux 8.8 Telecommunications Update Service lt *..0:1.12.0-15.el8_8.18
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions lt *..0:1.20.11-19.el8_8
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions lt *..0:21.1.3-13.el8_8.1
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions lt *..0:1.12.0-15.el8_8.18
Red Hat Enterprise Linux 9 lt *..0:24.1.9-4.el9_8.2
Red Hat Enterprise Linux 9 lt *..0:1.20.11-34.el9_8.2
Red Hat Enterprise Linux 9 lt *..0:1.15.0-7.el9_8.2
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions lt *..0:1.20.11-21.el9_2
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions lt *..0:21.1.3-10.el9_2.1
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions lt *..0:1.12.0-14.el9_2.15
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions lt *..0:1.20.11-29.el9_4
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions lt *..0:22.1.9-8.el9_4.1
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions lt *..0:1.13.1-8.el9_4.10
Red Hat Enterprise Linux 9.6 Extended Update Support lt *..0:1.20.11-34.el9_6
Red Hat Enterprise Linux 9.6 Extended Update Support lt *..0:23.2.7-6.el9_6.1
Red Hat Enterprise Linux 9.6 Extended Update Support lt *..0:1.14.1-11.el9_6
Fixed in: Red Hat Enterprise Linux 10 0:24.1.9-4.el10_2.2
Red Hat Enterprise Linux 10.0 Extended Update Support 0:24.1.5-6.el10_0.1
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION 0:1.1.0-25.el6_10.18
Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.20.4-35.el7_9
Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.8.0-36.el7_9.5
Red Hat Enterprise Linux 8 0:21.1.3-20.el8_10.2
Red Hat Enterprise Linux 8 0:1.20.11-28.el8_10.2
Red Hat Enterprise Linux 8 0:1.15.0-10.el8_10
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.20.10-5.el8_4
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.11.0-8.el8_4.16
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.20.10-5.el8_4
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.11.0-8.el8_4.16
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.20.11-8.el8_6
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:21.1.3-2.el8_6.7
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.12.0-6.el8_6.18
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.20.11-8.el8_6
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:21.1.3-2.el8_6.7
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.12.0-6.el8_6.18
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.20.11-19.el8_8
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:21.1.3-13.el8_8.1
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.12.0-15.el8_8.18
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.20.11-19.el8_8
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:21.1.3-13.el8_8.1
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.12.0-15.el8_8.18
Red Hat Enterprise Linux 9 0:24.1.9-4.el9_8.2
Red Hat Enterprise Linux 9 0:1.20.11-34.el9_8.2
Red Hat Enterprise Linux 9 0:1.15.0-7.el9_8.2
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.20.11-21.el9_2
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:21.1.3-10.el9_2.1
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.12.0-14.el9_2.15
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.20.11-29.el9_4
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:22.1.9-8.el9_4.1
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.13.1-8.el9_4.10
Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.20.11-34.el9_6
Red Hat Enterprise Linux 9.6 Extended Update Support 0:23.2.7-6.el9_6.1
Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.14.1-11.el9_6

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Metrics

7.8

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

7.8

CVSS v3

Severity High on the scale from 0 to 10.

Source: Debian LTS, BSI, Debian, Msrc Update Guide, CVE.org

0.2 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 4.9

Show all metrics

Severity: High
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 57.55 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 7.8 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 7.8
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 0.2 %; Low — model estimates < 1% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 4.9; Low — this CVE sits in the lower 10% of all CVEs scored today.
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 05.06.2026
CISA assessment (SSVC): Exploitation: none known · not automatable · Technical impact: total; Source: CISA Vulnrichment, as of 10 June 2026
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-121

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 byte stack buffer but libXfont2's alias target name length is 1024 bytes. A font alias name between 257 and 1023 bytes causes the X server to copy that name into the undersized stack buffer without further checks. This may be used to crash the server, or for privilege escalation if the X server runs as root.

Source: Debian LTS Advisories, BSI WID Portal, BSI CSAF, Debian Security Advisories, Microsoft Security Update Guide, NVD (NIST), CVE.org (MITRE), cvelistv5

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Red Hat	Red Hat Enterprise Linux 10	`< 0:24.1.9-4.el10_2.2`	`0:24.1.9-4.el10_2.2`
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	`< 0:24.1.5-6.el10_0.1`	`0:24.1.5-6.el10_0.1`
Red Hat	Red Hat Enterprise Linux 6	`—`	—
Red Hat	Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION	`< 0:1.1.0-25.el6_10.18`	`0:1.1.0-25.el6_10.18`
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	`< 0:1.20.4-35.el7_9` `< 0:1.8.0-36.el7_9.5`	`0:1.20.4-35.el7_9` `0:1.8.0-36.el7_9.5`
Red Hat	Red Hat Enterprise Linux 8	`< 0:1.20.11-28.el8_10.2` `< 0:21.1.3-20.el8_10.2` `< 0:1.15.0-10.el8_10`	`0:1.20.11-28.el8_10.2` `0:21.1.3-20.el8_10.2` `0:1.15.0-10.el8_10`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	`< 0:1.11.0-8.el8_4.16` `< 0:1.20.10-5.el8_4`	`0:1.11.0-8.el8_4.16` `0:1.20.10-5.el8_4`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	`< 0:1.20.10-5.el8_4` `< 0:1.11.0-8.el8_4.16`	`0:1.20.10-5.el8_4` `0:1.11.0-8.el8_4.16`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	`< 0:1.12.0-6.el8_6.18` `< 0:21.1.3-2.el8_6.7` `< 0:1.20.11-8.el8_6`	`0:1.12.0-6.el8_6.18` `0:21.1.3-2.el8_6.7` `0:1.20.11-8.el8_6`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	`< 0:1.20.11-8.el8_6` `< 0:21.1.3-2.el8_6.7` `< 0:1.12.0-6.el8_6.18`	`0:1.20.11-8.el8_6` `0:21.1.3-2.el8_6.7` `0:1.12.0-6.el8_6.18`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	`< 0:1.12.0-15.el8_8.18` `< 0:1.20.11-19.el8_8` `< 0:21.1.3-13.el8_8.1`	`0:1.12.0-15.el8_8.18` `0:1.20.11-19.el8_8` `0:21.1.3-13.el8_8.1`
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	`< 0:1.20.11-19.el8_8` `< 0:1.12.0-15.el8_8.18` `< 0:21.1.3-13.el8_8.1`	`0:1.20.11-19.el8_8` `0:1.12.0-15.el8_8.18` `0:21.1.3-13.el8_8.1`
Red Hat	Red Hat Enterprise Linux 9	`< 0:1.20.11-34.el9_8.2` `< 0:1.15.0-7.el9_8.2` `< 0:24.1.9-4.el9_8.2`	`0:1.20.11-34.el9_8.2` `0:1.15.0-7.el9_8.2` `0:24.1.9-4.el9_8.2`
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	`< 0:1.12.0-14.el9_2.15` `< 0:21.1.3-10.el9_2.1` `< 0:1.20.11-21.el9_2`	`0:1.12.0-14.el9_2.15` `0:21.1.3-10.el9_2.1` `0:1.20.11-21.el9_2`
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	`< 0:22.1.9-8.el9_4.1` `< 0:1.13.1-8.el9_4.10` `< 0:1.20.11-29.el9_4`	`0:22.1.9-8.el9_4.1` `0:1.13.1-8.el9_4.10` `0:1.20.11-29.el9_4`
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	`< 0:1.14.1-11.el9_6` `< 0:1.20.11-34.el9_6` `< 0:23.2.7-6.el9_6.1`	`0:1.14.1-11.el9_6` `0:1.20.11-34.el9_6` `0:23.2.7-6.el9_6.1`
x.org	x_server	`< 21.1.23`	`21.1.23`
x.org	xwayland	`< 24.1.12`	`24.1.12`
Oracle	Solaris	`<11.3 ESU 36.36` `<11.4 SRU 94`	— —

Vendors and products

Affected operating systems

Affected operating systems

Linux	redhat	enterprise_linux	`10.0`
Linux	redhat	enterprise_linux	`7.0`
Linux	redhat	enterprise_linux	`8.0`
Linux	redhat	enterprise_linux	`9.0`
Linux	debian	xorg-server	`bookworm`
Linux	debian	xorg-server	`bullseye`
Linux	debian	xorg-server	`trixie`

Weakness classes (CWE)

CWE-121Stack-based Buffer Overflow
Variant
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
Entry at MITRE CWE-121

References & sources

access.redhat.comsecurity/cve/CVE-2026-50256Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2485380Issue tracking, x_refsource_REDHAT
gitlab.freedesktop.orgxorg/xserver/-/commit/bb5158f962dc935e58ef8b4b5fcb31be201a6e07
lists.x.orgarchives/xorg-announce/2026-June/003702.html
redhat.atlassian.netbrowse/PSIRTSUPT-16950
access.redhat.comRHSA-2026:26562Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:26566Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:26590Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:26610Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:26709Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:28923Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:29844Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36083Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36085Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36086Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36087Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36632Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36633Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36634Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:36768Vendor advisory, x_refsource_REDHAT

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

05.08.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:49519

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:49519
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support (+25)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION (+34)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

05.08.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:49519

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:49519
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support (+34)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION (+34)

Source identifier: secalert@redhat.com

27.07.2026Record modifiedRed Hat ADP

New references:

and 3 more references

Show 7 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46377
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46382
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46385
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46392
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46456
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46460
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46473

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

27.07.2026Record modifiedRed Hat

New references:

Show 4 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46385
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46392
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46473
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support (+31)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support (+34)

Source identifier: secalert@redhat.com

27.07.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:46460

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46460
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support (+29)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support (+31)

Source identifier: secalert@redhat.com

Show 6 older changes

09.07.2026Record modifiedRed Hat ADP

New references:

Show 5 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36768
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36791
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36792
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36798
Affected versions (publisher)	changed	Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS), Red Hat Enterprise Linux AppStream (v. 10) (+11)	Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS), Red Hat Enterprise Linux AppStream EUS (v. 10.0) (+19)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

08.07.2026Record modifiedRed Hat

New references:

Show 4 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36632
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36633
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36634
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8 (+11)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8 (+14)

Source identifier: secalert@redhat.com

07.07.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:36086

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36086
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+8)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+9)

Source identifier: secalert@redhat.com

24.06.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:28923

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:28923
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+8)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+8)

Source identifier: secalert@redhat.com

17.06.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:26590

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:26590
Affected versions (publisher)	changed	Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 (+8)	Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10 (+8)

Source identifier: secalert@redhat.com

08.06.2026Initial analysis by NVDNVD

Newly listed as affected:

Red Hat Redhat Enterprise Linux (7.0, 8.0, 9.0, 10.0)
X.org X server (before 21.1.23)
X.Org Xwayland (before 24.1.12)

New references:

and 1 more reference

Show 6 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Product configuration	added	—	OR cpe:2.3:o:redhat:enterprise_linux:7.0::::::: cpe:2.3:o:redhat:enterprise_linux:8.0::::::: cpe:2.3:o:redhat:enterprise_linux:9.0::::::: cpe:2.3:o:redhat:enterprise_linux:10.0::::::: cpe:2.3:a:x.org:x_server::::::::* versions up to (excluding) 21.1.23 cpe:2.3:a:x.org:xwayland::::::::* versions up to (excluding) 24.1.12
Reference type	added	—	Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-50256 Types: Vendor Advisory
Reference type	added	—	Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2485380 Types: Issue Tracking, Vendor Advisory
Reference type	added	—	Red Hat, Inc.: https://gitlab.freedesktop.org/xorg/xserver/-/commit/bb5158f962dc935e58ef8b4b5fcb31be201a6e07 Types: Patch
Reference type	added	—	Red Hat, Inc.: https://lists.x.org/archives/xorg-announce/2026-June/003702.html Types: Mailing List, Third Party Advisory
Reference type	added	—	Red Hat, Inc.: https://redhat.atlassian.net/browse/PSIRTSUPT-16950 Types: Permissions Required

Source identifier: nvd@nist.gov

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<a href="https://intel.neosec.eu/en/cve/CVE-2026-50256"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-50256.svg?lang=en" alt="CVE-2026-50256 – NEOSEC Intel" height="20"></a>