CVE-2024-41013 (GCVE-0-2024-41013)

Vulnerability from cvelistv5 – Published: 2024-07-29 06:36 – Updated: 2026-01-05 10:37
VLAI?
Title
xfs: don't walk off the end of a directory data block
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: don't walk off the end of a directory data block This adds sanity checks for xfs_dir2_data_unused and xfs_dir2_data_entry to make sure don't stray beyond valid memory region. Before patching, the loop simply checks that the start offset of the dup and dep is within the range. So in a crafted image, if last entry is xfs_dir2_data_unused, we can change dup->length to dup->length-1 and leave 1 byte of space. In the next traversal, this space will be considered as dup or dep. We may encounter an out of bound read when accessing the fixed members. In the patch, we make sure that the remaining bytes large enough to hold an unused entry before accessing xfs_dir2_data_unused and xfs_dir2_data_unused is XFS_DIR2_DATA_ALIGN byte aligned. We also make sure that the remaining bytes large enough to hold a dirent with a single-byte name before accessing xfs_dir2_data_entry.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 82025d7f79148fe66a1594a0ebe4ab38152cf9e6 , < b0932e4f9da85349d1c8f2a77d2a7a7163b8511d (git)
Affected: 82025d7f79148fe66a1594a0ebe4ab38152cf9e6 , < ca96d83c93071f95cf962ce92406621a472df31b (git)
Affected: 82025d7f79148fe66a1594a0ebe4ab38152cf9e6 , < 0c7fcdb6d06cdf8b19b57c17605215b06afa864a (git)
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    Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.68 , ≤ 6.6.* (semver)
Unaffected: 6.11 , ≤ * (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.
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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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