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Vulnerabilities

Vulnerability · CVE-2025-40231

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 betwee

Published Dec 4, 2025 · catalog updated May 23, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-40231. EPSS is 0.21%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb <ce4f856c64f0bc30e29302a0ce41f4295ca391c5

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 r

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb <ce4f856c64f0bc30e29302a0ce41f4295ca391c58667e8d0eb46bc54fdae30ba2f4786407d3d88eb <ce4f856c64f0bc30e29302a0ce41f4295ca391c5

How to fix CVE-2025-40231

  • Upgrade

    CVE-2025-40231 lists a fix boundary at ce4f856c64f0bc30e29302a0ce41f4295ca391c5. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb <ce4f856c64f0bc30e29302a0ce41f4295ca391c5

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-40231. EPSS is 0.21%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb <ce4f856c64f0bc30e29302a0ce41f4295ca391c5 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb <ce4f856c64f0bc30e29302a0ce41f4295ca391c5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 4, 2025 · EUVD

    Detected

    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_transp

  2. May 23, 2026 · EUVD

    Updated

    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_transp

Sources

  • CVE.orgVulnerability recordCVE-2025-40231

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-40231

    30-day exploitation probability 0.21%

    first.org
  • EUVDVulnerability recordEUVD-2025-201228

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026