CVE-2024-39482 (GCVE-0-2024-39482)

Vulnerability from cvelistv5 – Published: 2024-07-05 06:55 – Updated: 2025-07-11 17:19
VLAI?
Title
bcache: fix variable length array abuse in btree_iter
Summary
In the Linux kernel, the following vulnerability has been resolved: bcache: fix variable length array abuse in btree_iter btree_iter is used in two ways: either allocated on the stack with a fixed size MAX_BSETS, or from a mempool with a dynamic size based on the specific cache set. Previously, the struct had a fixed-length array of size MAX_BSETS which was indexed out-of-bounds for the dynamically-sized iterators, which causes UBSAN to complain. This patch uses the same approach as in bcachefs's sort_iter and splits the iterator into a btree_iter with a flexible array member and a btree_iter_stack which embeds a btree_iter as well as a fixed-length data array.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 2c3d7b03b658dc8bfa6112b194b67b92a87e081b (git)
Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 5a1922adc5798b7ec894cd3f197afb6f9591b023 (git)
Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 934e1e4331859183a861f396d7dfaf33cb5afb02 (git)
Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 6479b9f41583b013041943c4602e1ad61cec8148 (git)
Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 0c31344e22dd8d6b1394c6e4c41d639015bdc671 (git)
Affected: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 , < 3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31 (git)
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    Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.10.221 , ≤ 5.10.* (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.94 , ≤ 6.1.* (semver)
Unaffected: 6.6.34 , ≤ 6.6.* (semver)
Unaffected: 6.9.5 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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  • 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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