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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-50855

bpf: prevent leak of lsm program after failed attach

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Status
Published
Published
Updated
Assigning organization
Linux

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/

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e to < 82b39df5ddb298daaf6dc504032ff7eb027fa106affected
  • 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e to < 6a1504dd36cd9a0a69250d61da8bdb17b29f1fe8affected
  • 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e to < e89f3edffb860a0f54a9ed16deadb7a4a1fa3862affected

Linux Linux

Default version status: affected

  • 6.0affected
  • 0 to < 6.0unaffected
  • 6.0.16 to ≤ 6.0.*unaffected
  • 6.1.2 to ≤ 6.1.*unaffected
  • 6.2 to ≤ *unaffected

References