7.1

CVE-2026-53361: af_unix: Set gc_in_progress to true in unix_gc().

Modified
AliasesUBUNTU-CVE-2026-53361DEBIAN-CVE-2026-53361CGA-56fc-565h-53x5
Published 04-07-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-53361 is a high (CVSS 7.1) vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · -0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 16
MGASA-2026-0312RHSA-2026:62609RHSA-2026:67471USN-8726-1USN-8726-2USN-8726-3

Timeline

  1. 04-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.23% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu142 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard2 products
  • linux-gcp-6.18< 6.18.39-r0
  • linux-gcp-6.18-bootc< 6.18.39-r0
Linux2 products
  • linux≥ ceb8bd6c69c1680fd9b45e7f16d7170c9c7513a5, < 20aa894d475bd8086b25c1113ec4ca70f70c7a98 | ≥ 328840c93bd6a4871dd10908d01b41eab83eb8e2, < 82c17e13d404f686e164590483fd6c1abaa675d0 | ≥ 8b90a9f819dc2a06baae4ec1a64d875e53b824ec, < 591f1ac217428a6d2b32a8ac14aac0fab44f155a | ≥ 8b90a9f819dc2a06baae4ec1a64d875e53b824ec, < 0cfa78c050662784fc8e3ab26dbfd1dc632b2082 | ≥ 8b90a9f819dc2a06baae4ec1a64d875e53b824ec, < d82ba05263c69fa2437fe93e4e561cc40f4c03af | ≥ 6.1.141, < 6.1.183 | ≥ 6.6.93, < 6.6.144 | 6.9
  • linux_kernel≥ 6.1.141, < 6.2 | ≥ 6.6.93, < 6.6.144 | ≥ 6.9, < 6.12.95 | ≥ 6.13, < 6.18.38 | ≥ 6.19, < 7.1 | 7.1:rc1 | 7.1:rc2
Debian1 product
  • linux< 6.1.187-1 | < 6.12.95-1 | < 7.1.3-1

4 vendors · 147 products

References

27 links
Show all 27 references