CVE-2023-54214

Bluetooth: L2CAP: Fix potential user-after-free

State: Published
Severity: 8.8 High
Published: Dec 30, 2025
Updated: Oct 15, 2026
Reserved: Dec 30, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: L2CAP: Fix potential user-after-free

This fixes all instances of which requires to allocate a buffer calling alloc_skb which may release the chan lock and reacquire later which makes it possible that the chan is disconnected in the meantime.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before b2fde8cb2a25125111f2144604e0e7c0ebcc4bbaAffected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49Affected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 60aaccf16d1e099c16bebfb96428ae762cb528f7Affected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before b8ed41cc04fb74005aa51d17865ca3d022760335Affected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 31a288a4df7f6a28e65da22a4ab2add4a963738eAffected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 64e28ecf44e46de9f01915a4146706a21c3469d2Affected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 994e3e18908f5c4a12d07b44018e6aa85f071048Affected a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before df5703348813235874d851934e957c3723d71644Affected
LinuxLinux	3.5Affected before 3.5Not affected 4.14.308 through 4.14.Not affected 4.19.276 through 4.19.Not affected 5.4.235 through 5.4.Not affected 5.10.173 through 5.10.Not affected 5.15.99 through 5.15.Not affected 6.1.16 through 6.1.Not affected 6.2.3 through 6.2.*Not affected 6.3 and laterNot affected

Product

Versions

LinuxLinux

a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before b2fde8cb2a25125111f2144604e0e7c0ebcc4bbaAffected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49Affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 60aaccf16d1e099c16bebfb96428ae762cb528f7Affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before b8ed41cc04fb74005aa51d17865ca3d022760335Affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 31a288a4df7f6a28e65da22a4ab2add4a963738eAffected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 64e28ecf44e46de9f01915a4146706a21c3469d2Affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before 994e3e18908f5c4a12d07b44018e6aa85f071048Affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 to before df5703348813235874d851934e957c3723d71644Affected

LinuxLinux

3.5Affected
before 3.5Not affected
4.14.308 through 4.14.*Not affected
4.19.276 through 4.19.*Not affected
5.4.235 through 5.4.*Not affected
5.10.173 through 5.10.*Not affected
5.15.99 through 5.15.*Not affected
6.1.16 through 6.1.*Not affected
6.2.3 through 6.2.*Not affected
6.3 and laterNot affected

References

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