Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2024-39482

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
05/07/2024
Last modified:
08/07/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bcache: fix variable length array abuse in btree_iter<br /> <br /> btree_iter is used in two ways: either allocated on the stack with a<br /> fixed size MAX_BSETS, or from a mempool with a dynamic size based on the<br /> specific cache set. Previously, the struct had a fixed-length array of<br /> size MAX_BSETS which was indexed out-of-bounds for the dynamically-sized<br /> iterators, which causes UBSAN to complain.<br /> <br /> This patch uses the same approach as in bcachefs&amp;#39;s sort_iter and splits<br /> the iterator into a btree_iter with a flexible array member and a<br /> btree_iter_stack which embeds a btree_iter as well as a fixed-length<br /> data array.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.10 (including) 5.10.221 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.15 (including) 5.15.162 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.1 (including) 6.1.94 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.6 (including) 6.6.34 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.9 (including) 6.9.5 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools