CVE-2024-47703 (GCVE-0-2024-47703)
Vulnerability from cvelistv5
Published
2024-10-21 11:53
Modified
2025-05-04 09:37
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29
Version: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29
Version: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29
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