fkie_cve-2022-50855
Vulnerability from fkie_nvd
Published
2025-12-30 13:16
Modified
2025-12-30 13:16
Severity ?
Summary
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/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a1504dd36cd9a0a69250d61da8bdb17b29f1fe8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82b39df5ddb298daaf6dc504032ff7eb027fa106
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e89f3edffb860a0f54a9ed16deadb7a4a1fa3862
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: prevent leak of lsm program after failed attach\n\nIn [0], we added the ability to bpf_prog_attach LSM programs to cgroups,\nbut in our validation to make sure the prog is meant to be attached to\nBPF_LSM_CGROUP, we return too early if the check fails. This results in\nlack of decrementing prog\u0027s refcnt (through bpf_prog_put)\nleaving the LSM program alive past the point of the expected lifecycle.\nThis fix allows for the decrement to take place.\n\n[0] https://lore.kernel.org/all/20220628174314.1216643-4-sdf@google.com/"
    }
  ],
  "id": "CVE-2022-50855",
  "lastModified": "2025-12-30T13:16:00.223",
  "metrics": {},
  "published": "2025-12-30T13:16:00.223",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6a1504dd36cd9a0a69250d61da8bdb17b29f1fe8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/82b39df5ddb298daaf6dc504032ff7eb027fa106"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e89f3edffb860a0f54a9ed16deadb7a4a1fa3862"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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