Description
In the Linux kernel, the following vulnerability has been resolved:
af_unix: Set gc_in_progress to true in unix_gc().
Igor Ushakov reported that unix_gc() could run with gc_in_progress being false if the work is scheduled while running:
Thread 1 Thread 2 Thread 3 -------- -------- -------- unix_schedule_gc() unix_schedule_gc() `- if (!gc_in_progress) `- if (!gc_in_progress) |- gc_in_progress = true | `- queue_work() | unix_gc() <----------------/ | | |- gc_in_progress = true ... `- queue_work() | | `- gc_in_progress = false | | unix_gc() <---------------------------------------------' | ... /* gc_in_progress == false */ | `- gc_in_progress = false
unix_peek_fpl() relies on gc_in_progress not to confuse GC by MSG_PEEK.
Let's set gc_in_progress to true in unix_gc().
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= ceb8bd6c69c1680fd9b45e7f16d7170c9c7513a5, < 20aa894d475bd8086b25c1113ec4ca70f70c7a98; >= 328840c93bd6a4871dd10908d01b41eab83eb8e2, < 82c17e13d404f686e164590483fd6c1abaa675d0; >= 8b90a9f819dc2a06baae4ec1a64d875e53b824ec, < 591f1ac217428a6d2b32a8ac14aac0fab44f155a; >= 8b90a9f819dc2a06baae4ec1a64d875e53b824ec, < 0cfa78c050662784fc8e3ab26dbfd1dc632b2082; >= 8b90a9f819dc2a06baae4ec1a64d875e53b824ec, < d82ba05263c69fa2437fe93e4e561cc40f4c03af; >= 6.1.141, < 6.1.183; >= 6.6.93, < 6.6.144 |
| Linux | Linux | 6.9 |
References
- https://git.kernel.org/stable/c/0cfa78c050662784fc8e3ab26dbfd1dc632b2082Patch
- https://git.kernel.org/stable/c/20aa894d475bd8086b25c1113ec4ca70f70c7a98
- https://git.kernel.org/stable/c/591f1ac217428a6d2b32a8ac14aac0fab44f155aPatch
- https://git.kernel.org/stable/c/82c17e13d404f686e164590483fd6c1abaa675d0Patch
- https://git.kernel.org/stable/c/d82ba05263c69fa2437fe93e4e561cc40f4c03afPatch
Timeline
- Published
- Jul 4, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified