Riskcovery

CVE-2025-21666

vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]

State
Published
Severity
5.5 Medium
Published
Jan 31, 2025
Updated
Oct 15, 2026
Reserved
Dec 29, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]

Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't.

Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning.

This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.

Scores

CVSSScoreVectorSource
3.15.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before daeac89cdb03d30028186f5ff7dc26ec8fa843e7Affected
  • c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853eAffected
  • c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before b52e50dd4fabd12944172bd486a4f4853b7f74ddAffected
  • c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before bc9c49341f9728c31fe248c5fbba32d2e81a092bAffected
  • c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before c23d1d4f8efefb72258e9cedce29de10d057f8caAffected
  • c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 91751e248256efc111e52e15115840c35d85abafAffected
LinuxLinux
  • 5.5Affected
  • before 5.5Not affected
  • 5.10.234 through 5.10.*Not affected
  • 5.15.177 through 5.15.*Not affected
  • 6.1.127 through 6.1.*Not affected
  • 6.6.74 through 6.6.*Not affected
  • 6.12.11 through 6.12.*Not affected
  • 6.13 and laterNot affected

References

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