CVE-2025-40231: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40231DEBIAN-CVE-2025-40231
Published 04-12-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2025-40231 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.1% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 42 · Related 41
DLA-4404-1OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0315-1SUSE-SU-2026:20207-1

Timeline

  1. 04-12-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: fix lock inversion in vsock_assign_transport() Syzbot reported a potential lock inversion deadlock between vsock_register_mutex and sk_lock-AF_VSOCK when vsock_linger() is called. The issue was introduced by commit 687aa0c5581b ("vsock: Fix transport_* TOCTOU") which added vsock_register_mutex locking in vsock_assign_transport() around the transport->release() call, that can call vsock_linger(). vsock_assign_transport() can be called with sk_lock held. vsock_linger() calls sk_wait_event() that temporarily releases and re-acquires sk_lock. During this window, if another thread hold vsock_register_mutex while trying to acquire sk_lock, a circular dependency is created. Fix this by releasing vsock_register_mutex before calling transport->release() and vsock_deassign_transport(). This is safe because we don't need to hold vsock_register_mutex while releasing the old transport, and we ensure the new transport won't disappear by obtaining a module reference first via try_module_get().

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu139 products
  • linux< 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1100.107 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb, < ce4f856c64f0bc30e29302a0ce41f4295ca391c5 | ≥ 36a439049b34cca0b3661276049b84a1f76cc21a, < 09bba278ccde25a14b6e5088a9e65a8717d0cccf | ≥ 9ce53e744f18e73059d3124070e960f3aa9902bf, < b44182c116778feaa05da52a426aeb9da1878dcf | ≥ 9d24bb6780282b0255b9929abe5e8f98007e2c6e, < 42ed0784d11adebf748711e503af0eb9f1e6d81d | ≥ ae2c712ba39c7007de63cb0c75b51ce1caaf1da5, < 251caee792a21eb0b781aab91362b422c945e162 | ≥ 687aa0c5581b8d4aa87fd92973e4ee576b550cdf, < a2a4346eea8b4cb75037dbcb20b98cb454324f80 | ≥ 687aa0c5581b8d4aa87fd92973e4ee576b550cdf, < f7c877e7535260cc7a21484c994e8ce7e8cb6780 | 7b73bddf54777fb62d4d8c7729d0affe6df04477 | ≥ 5.10.240, < 5.10.246 | ≥ 5.15.189, < 5.15.196 | ≥ 6.1.146, < 6.1.158 | ≥ 6.6.99, < 6.6.115 | ≥ 6.12.39, < 6.12.56 | ≥ 6.15.7, < 6.16 | 6.16

3 vendors · 141 products

References

40 links
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