Riskcovery

CVE-2022-50855

bpf: prevent leak of lsm program after failed attach

State
Published
Severity
Not scored
Published
Dec 30, 2025
Updated
May 11, 2026
Reserved
Dec 30, 2025

Read the record on cve.org

Description

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

bpf: prevent leak of lsm program after failed attach

In [0], we added the ability to bpf_prog_attach LSM programs to cgroups, but in our validation to make sure the prog is meant to be attached to BPF_LSM_CGROUP, we return too early if the check fails. This results in lack of decrementing prog's refcnt (through bpf_prog_put) leaving the LSM program alive past the point of the expected lifecycle. This fix allows for the decrement to take place.

[0] https://lore.kernel.org/all/20220628174314.1216643-4-sdf@google.com/

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e to before 82b39df5ddb298daaf6dc504032ff7eb027fa106Affected
  • 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e to before 6a1504dd36cd9a0a69250d61da8bdb17b29f1fe8Affected
  • 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e to before e89f3edffb860a0f54a9ed16deadb7a4a1fa3862Affected
LinuxLinux
  • 6.0Affected
  • before 6.0Not affected
  • 6.0.16 through 6.0.*Not affected
  • 6.1.2 through 6.1.*Not affected
  • 6.2 and laterNot affected

References

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