Overview
About vulnerability
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().
Details
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Debian 13 | Planned | — |