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Vulnerability record · CVE-2026-53361 · published 4 July 2026

CVE-2026-53361: Linux kernel vulnerability

Linux · Linux Kernel

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().

7.1 CVSS 3.1 High EPSS 0.23% · top 87.4%
7.1CVSS 3.1 base score
0.23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
19 Aug 2026Last modified by NVD

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().

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0cfa78c050662784fc8e3ab26dbfd1dc632b2082 Patch
https://git.kernel.org/stable/c/20aa894d475bd8086b25c1113ec4ca70f70c7a98
https://git.kernel.org/stable/c/591f1ac217428a6d2b32a8ac14aac0fab44f155a Patch
https://git.kernel.org/stable/c/82c17e13d404f686e164590483fd6c1abaa675d0 Patch
https://git.kernel.org/stable/c/d82ba05263c69fa2437fe93e4e561cc40f4c03af Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53361), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.