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.
History

Fri, 11 Jul 2025 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-07-11T17:19:50.338Z

Reserved: 2024-06-25T14:23:23.746Z

Link: CVE-2024-39482

cve-icon Vulnrichment

Updated: 2024-08-02T04:26:15.917Z

cve-icon NVD

Status : Modified

Published: 2024-07-05T07:15:10.710

Modified: 2024-11-21T09:27:47.023

Link: CVE-2024-39482

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-07-05T00:00:00Z

Links: CVE-2024-39482 - Bugzilla

cve-icon OpenCVE Enrichment

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