HighCVE-2026-46189

Linux Kernel: Double Free (CVE-2026-46189)

Published 28.05.2026Last modified 06.11.2026Sources: SUSE, Debian LTS, BSI, Ubuntu, Red Hat, CVE.org, Msrc Update Guide, EUVD

What is affected, what to do

In the Linux kernel, the following vulnerability has been resolved: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path Sashiko points out that pvrdma_uar_free() is already called within pvrdma_dealloc_ucontext(), so calling it before triggers a double free.

Update Linux Kernel to version 5.10.258, Linux Kernel to version 5.15.209, Linux Kernel to version 6.1.175.

Affected: Linux Kernel lt 4.10..5.10.258
Linux Kernel lt 5.11..5.15.209
Linux Kernel lt 5.16..6.1.175
Linux Kernel lt 6.2..6.6.140
Linux Kernel lt 6.7..6.12.88
Linux Kernel lt 6.13..6.18.30
Linux Kernel lt 6.19..7.0.7
Fixed in: Linux Kernel 5.10.258
Linux Kernel 5.15.209
Linux Kernel 6.1.175
Linux Kernel 6.6.140
Linux Kernel 6.12.88
Linux Kernel 6.18.30
Linux Kernel 7.0.7
Linux Kernel 7.1

Not sure whether and how you are affected? Ask a question about this vulnerability

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: SUSE, Debian LTS, BSI, Ubuntu, Red Hat, CVE.org, Msrc Update Guide, EUVD

0.1 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 3.7

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: 56.73 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: 0.1 %; 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: 3.7; 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: 28.05.2026
CISA assessment (SSVC): Exploitation: none known · not automatable · Technical impact: partial; Source: CISA Vulnrichment, as of 6 November 2026

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

Source: suse_csaf, Debian LTS Advisories, BSI WID Portal, BSI CSAF, Ubuntu Security Notices, redhat_csaf, cvelistv5, NVD (NIST), Microsoft Security Update Guide, ENISA EUVD, CVE.org (MITRE)

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
Linux	Linux	`5.16 – < 6.1.175` `6.7 – < 6.12.88` `6.2 – < 6.6.140` `4.10 – < 5.10.258` `6.19 – < 7.0.7` `5.11 – < 5.15.209` `—` `6.13 – < 6.18.30`	`6.1.175` `6.12.88` `6.6.140` `5.10.258` `7.0.7` `5.15.209` `7.1` `6.18.30`
IBM	QRadar SIEM	`<7.5.0 UP15 IF06`	—

Vendors and products

Affected operating systems

Affected operating systems

Linux	debian	linux	`bookworm`
Linux	debian	linux	`bullseye`
Linux	debian	linux-6.1	`bullseye`
Linux	ubuntu	linux-oracle-7.0	`noble`
Linux	linux	linux_kernel	`7.1`
Linux	linux	linux_kernel	—

References & sources

git.kernel.orgstable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0euvd, Patch
git.kernel.orgstable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0euvd, Patch
git.kernel.orgstable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59euvd, Patch
git.kernel.orgstable/c/935ee27d0904aa944cbcc979094c20e5ef62eeadeuvd, Patch
git.kernel.orgstable/c/e38e86995df27f1f854063dab1f0c6a513db3fafeuvd, Patch
git.kernel.orgstable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4Patch
git.kernel.orgstable/c/1df5711121cdc11e76b889408fdbe459feba1d39Patch
git.kernel.orgstable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483Patch
access.redhat.comsecurity/cve/CVE-2026-46189Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2482588Issue tracking, x_refsource_REDHAT
security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-46189.jsonx_sadp-csaf-vex
access.redhat.comerrata/RHSA-2026:33685Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:36073Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:36767Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:38902Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:30848Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:33743Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:47633Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:40068Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:40760Vendor 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).

06.11.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: none known, automatable: no

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	added	—	{"id":"CVE-2026-46189","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-11-06T16:11:36.846828Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

09.09.2026Record modifiedLinux

New references:

and 4 more references

Show 24 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://git.kernel.org/stable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59
Reference	added	—	https://git.kernel.org/stable/c/1df5711121cdc11e76b889408fdbe459feba1d39
Reference	added	—	https://git.kernel.org/stable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4
Reference	added	—	https://git.kernel.org/stable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483
Reference	added	—	https://git.kernel.org/stable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0
Reference	added	—	https://git.kernel.org/stable/c/935ee27d0904aa944cbcc979094c20e5ef62eead
Reference	added	—	https://git.kernel.org/stable/c/e38e86995df27f1f854063dab1f0c6a513db3faf
Reference	added	—	https://git.kernel.org/stable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0
Reference	removed	https://git.kernel.org/stable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59	—
Reference	removed	https://git.kernel.org/stable/c/1df5711121cdc11e76b889408fdbe459feba1d39	—
Reference	removed	https://git.kernel.org/stable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4	—
Reference	removed	https://git.kernel.org/stable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483	—
Reference	removed	https://git.kernel.org/stable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0	—
Reference	removed	https://git.kernel.org/stable/c/935ee27d0904aa944cbcc979094c20e5ef62eead	—
Reference	removed	https://git.kernel.org/stable/c/e38e86995df27f1f854063dab1f0c6a513db3faf	—
Reference	removed	https://git.kernel.org/stable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0	—
Reference type	removed	https://git.kernel.org/stable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/1df5711121cdc11e76b889408fdbe459feba1d39 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/935ee27d0904aa944cbcc979094c20e5ef62eead Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/e38e86995df27f1f854063dab1f0c6a513db3faf Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0 Types: Patch	—

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

09.09.2026Record modifiedRed Hat ADP

Weakness type: CWE-763

New references:

and 8 more references

Show 30 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Weakness type (CWE)	added	—	CWE-763
Weakness type (CWE)	removed	CWE-1341	—
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:30848
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:33685
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:33743
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:35904
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36049
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36073
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36767
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:38902
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:40068
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:40760
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:47633
Reference	added	—	https://access.redhat.com/security/cve/CVE-2026-46189
Reference	added	—	https://bugzilla.redhat.com/show_bug.cgi?id=2482588
Reference	added	—	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46189.json
Reference	removed	https://access.redhat.com/errata/RHSA-2026:30848	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:33685	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:33743	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:35904	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36049	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36073	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36767	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:38902	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:40068	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:40760	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:47633	—
Reference	removed	https://access.redhat.com/security/cve/CVE-2026-46189	—
Reference	removed	https://bugzilla.redhat.com/show_bug.cgi?id=2482588	—
Reference	removed	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46189.json	—

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

30.07.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:47633

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-2026:47633
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+13)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+15)

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

09.07.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:36767

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-2026:36767
Affected versions (publisher)	changed	Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream (v. 9) (+18)	Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream E4S (v.9.4) (+22)

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

Show one older change

11.06.2026Initial analysis by NVDNVD

Newly listed as affected:

Linux Kernel (6.13 – before 6.18.30; 5.16 – before 6.1.175; 5.11 – before 5.15.209; 6.19 – before 7.0.7; 6.7 – before 6.12.88; 6.2 – before 6.6.140; 4.10 – before 5.10.258; 2 individual versions)

CVSS V3.1: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type: CWE-415

New references:

and 4 more references

Show 11 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
CVSS	added	—	AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)	added	—	CWE-415
Product configuration	added	—	OR cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::* cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.13 up to (excluding) 6.18.30 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.16 up to (excluding) 6.1.175 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.11 up to (excluding) 5.15.209 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.19 up to (excluding) 7.0.7 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.7 up to (excluding) 6.12.88 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.2 up to (excluding) 6.6.140 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 4.10 up to (excluding) 5.10.258
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59 Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/1df5711121cdc11e76b889408fdbe459feba1d39 Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4 Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483 Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0 Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/935ee27d0904aa944cbcc979094c20e5ef62eead Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/e38e86995df27f1f854063dab1f0c6a513db3faf Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0 Types: Patch

Source identifier: nvd@nist.gov

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<a href="https://intel.neosec.eu/en/cve/CVE-2026-46189"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-46189.svg?lang=en" alt="CVE-2026-46189 – NEOSEC Intel" height="20"></a>