HighCVE-2026-53071

Linux Kernel: security vulnerability (CVE-2026-53071)

Published 24.06.2026Last modified 19.10.2026Sources: SUSE, Debian LTS, BSI, Ubuntu, Red Hat, CVE.org, Msrc Update Guide

What is affected, what to do

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 5.7..5.10.258
Linux Kernel lt 5.11..5.15.209
Linux Kernel lt 5.16..6.1.175
Linux Kernel lt 6.2..6.6.141
Linux Kernel lt 6.7..6.12.91
Linux Kernel lt 6.13..6.18.33
Linux Kernel lt 6.19..7.0.10
Fixed in: Linux Kernel 5.10.258
Linux Kernel 5.15.209
Linux Kernel 6.1.175
Linux Kernel 6.6.141
Linux Kernel 6.12.91
Linux Kernel 6.18.33
Linux Kernel 7.0.10
Linux Kernel 7.1

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

Metrics

8.8

Priority

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

Source: NVD, CVSS v3

8.8

CVSS v3

Severity High on the scale from 0 to 10.

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

0.4 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 37.4

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: 74.14 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: 8.8 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: 8.8
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: 0.4 %; 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: 37.4; High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
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: 24.06.2026
CISA assessment (SSVC): Exploitation: none known · not automatable · Technical impact: total; Source: CISA Vulnrichment, as of 16 October 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-416

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 flaw was found in the Linux kernel's Bluetooth Logical Link Control and Adaptation Protocol (L2CAP) implementation. A remote Bluetooth Low Energy (BLE) device can exploit this by sending a specially crafted L2CAP ECRED reconfiguration response. This can lead to the corruption of the channel list, potentially causing a Denial of Service (DoS) by making the system unstable or unresponsive. The vulnerability is due to a missing channel lock when a channel is deleted.

Source: suse_csaf, Debian LTS Advisories, BSI WID Portal, BSI CSAF, Ubuntu Security Notices, redhat_csaf, cvelistv5, NVD (NIST), Microsoft Security Update Guide, 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` `5.7 – < 5.10.258` `5.11 – < 5.15.209` `6.7 – < 6.12.91` `—` `6.13 – < 6.18.33` `6.2 – < 6.6.141` `6.19 – < 7.0.10`	`6.1.175` `5.10.258` `5.15.209` `6.12.91` `7.1` `6.18.33` `6.6.141` `7.0.10`
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	linux	linux_kernel	—

Weakness classes (CWE)

CWE-416Use After Free
Variant
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Entry at MITRE CWE-416

References & sources

git.kernel.orgstable/c/96dca51715d86559ed6ed8028e5445cecb80f3aePatch
git.kernel.orgstable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64cPatch
git.kernel.orgstable/c/0ccd75c51f620374086f359e906917676e699a1cPatch
git.kernel.orgstable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917Patch
git.kernel.orgstable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14Patch
git.kernel.orgstable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0cPatch
git.kernel.orgstable/c/5501d055a1ce3c747141e3955ba8cf034d193f3ePatch
git.kernel.orgstable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eabPatch
access.redhat.comsecurity/cve/CVE-2026-53071Vulnerability database, x_refsource_REDHAT, Third-party advisory
bugzilla.redhat.comRHBZ#2492458Issue tracking, x_refsource_REDHAT, Third-party advisory
security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-53071.jsonx_sadp-csaf-vex, Third-party advisory
access.redhat.comerrata/RHSA-2026:42919Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:43307Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42552Vendor advisory, x_refsource_REDHAT, Third-party advisory
access.redhat.comerrata/RHSA-2026:42550Vendor advisory, x_refsource_REDHAT, Third-party advisory
access.redhat.comerrata/RHSA-2026:65710Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:65711Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:67723Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:67721Vendor 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).

19.10.2026Record modifiedCISA ADP
Weakness type: CWE-416
Show the original change
Individual changes of this event as published by NVD
Type Action Before After
Weakness type (CWE) added
—
CWE-416
Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Individual changes of this event as published by NVD
Type	Action	Before	After
Weakness type (CWE)	added	—	CWE-416

16.10.2026Record 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-2026-53071","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:25:10.366557Z"}

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

16.09.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/53xxx/CVE-2026-53071.json">CVE-2026-53071</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67721
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67723

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

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/0ccd75c51f620374086f359e906917676e699a1c
Reference	added	—	https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c
Reference	added	—	https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab
Reference	added	—	https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e
Reference	added	—	https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917
Reference	added	—	https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae
Reference	added	—	https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c
Reference	added	—	https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14
Reference	removed	https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c	—
Reference	removed	https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c	—
Reference	removed	https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab	—
Reference	removed	https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e	—
Reference	removed	https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917	—
Reference	removed	https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae	—
Reference	removed	https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c	—
Reference	removed	https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14	—
Reference type	removed	https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 Types: Patch	—

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

09.09.2026Record modifiedRed Hat ADP

New references:

and 5 more references

Show 21 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42550
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42552
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42919
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:43307
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65710
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65711
Reference	added	—	https://access.redhat.com/security/cve/CVE-2026-53071
Reference	added	—	https://bugzilla.redhat.com/show_bug.cgi?id=2492458
Reference	added	—	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json
Reference	removed	https://access.redhat.com/errata/RHSA-2026:42550	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:42552	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:42919	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:43307	—
Reference	removed	https://access.redhat.com/security/cve/CVE-2026-53071	—
Reference	removed	https://bugzilla.redhat.com/show_bug.cgi?id=2492458	—
Reference	removed	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json	—
Reference type	removed	https://access.redhat.com/errata/RHSA-2026:42550 Types: Third Party Advisory	—
Reference type	removed	https://access.redhat.com/errata/RHSA-2026:42552 Types: Third Party Advisory	—
Reference type	removed	https://access.redhat.com/security/cve/CVE-2026-53071 Types: Third Party Advisory	—
Reference type	removed	https://bugzilla.redhat.com/show_bug.cgi?id=2492458 Types: Third Party Advisory	—
Reference type	removed	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json Types: Third Party Advisory	—

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

Show 5 older changes

23.07.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:43307

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-2026:43307
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+5)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+5)

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

22.07.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:42919

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-2026:42919
Affected versions (publisher)	changed	Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 10 (+5)	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+5)

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

21.07.2026Initial analysis by NVDNVD

Newly listed as affected:

Linux Kernel (6.2 – before 6.6.141; 6.7 – before 6.12.91; 6.13 – before 6.18.33; 6.19 – before 7.0.10; 5.16 – before 6.1.175; 5.11 – before 5.15.209; 5.7 – before 5.10.258)

Weakness type: CWE-667

New references:

and 8 more references

Show 15 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Weakness type (CWE)	added	—	CWE-667
Product configuration	added	—	OR cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.2 up to (excluding) 6.6.141 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.7 up to (excluding) 6.12.91 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.13 up to (excluding) 6.18.33 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.19 up to (excluding) 7.0.10 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) 5.7 up to (excluding) 5.10.258
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917 Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c Types: Patch
Reference type	added	—	kernel.org: https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 Types: Patch
Reference type	added	—	redhat-SADP: https://access.redhat.com/errata/RHSA-2026:42550 Types: Third Party Advisory
Reference type	added	—	redhat-SADP: https://access.redhat.com/errata/RHSA-2026:42552 Types: Third Party Advisory
Reference type	added	—	redhat-SADP: https://access.redhat.com/security/cve/CVE-2026-53071 Types: Third Party Advisory
Reference type	added	—	redhat-SADP: https://bugzilla.redhat.com/show_bug.cgi?id=2492458 Types: Third Party Advisory
Reference type	added	—	redhat-SADP: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json Types: Third Party Advisory

Source identifier: nvd@nist.gov

21.07.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42550
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42552
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 (+5)	Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 10 (+5)

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

24.06.2026ReceivedLinux

Description added or changed

New references:

and 4 more references

Show 10 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Linux, Linux
Description	added	—	In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it. Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().
Reference	added	—	https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c
Reference	added	—	https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c
Reference	added	—	https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab
Reference	added	—	https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e
Reference	added	—	https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917
Reference	added	—	https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae
Reference	added	—	https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c
Reference	added	—	https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14

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

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<a href="https://intel.neosec.eu/en/cve/CVE-2026-53071"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-53071.svg?lang=en" alt="CVE-2026-53071 – NEOSEC Intel" height="20"></a>