PT-2026-55699 · Linux · Linux

Igor Ushakov

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Published

2026-07-04

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Updated

2026-07-04

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CVE-2026-53361

None

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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().
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Related Identifiers

CVE-2026-53361

Affected Products

Linux