CVE-2024-47703 (GCVE-0-2024-47703)

Vulnerability from cvelistv5 – Published: 2024-10-21 11:53 – Updated: 2025-05-04 09:37
VLAI?
Title
bpf, lsm: Add check for BPF LSM return value
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, lsm: Add check for BPF LSM return value A bpf prog returning a positive number attached to file_alloc_security hook makes kernel panic. This happens because file system can not filter out the positive number returned by the LSM prog using IS_ERR, and misinterprets this positive number as a file pointer. Given that hook file_alloc_security never returned positive number before the introduction of BPF LSM, and other BPF LSM hooks may encounter similar issues, this patch adds LSM return value check in verifier, to ensure no unexpected value is returned.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29 , < 1050727d83e70449991c29dd1cf29fe936a63da3 (git)
Affected: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29 , < 27ca3e20fe80be85a92b10064dfeb56cb2564b1c (git)
Affected: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29 , < 5d99e198be279045e6ecefe220f5c52f8ce9bfd5 (git)
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    Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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