vulnerability

Alma Linux: CVE-2024-50262: Moderate: kernel security update (ALSA-2024-11486)

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Nov 9, 2024
Added
Jan 14, 2025
Modified
Aug 11, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix out-of-bounds write in trie_get_next_key()

trie_get_next_key() allocates a node stack with size trie->max_prefixlen,
while it writes (trie->max_prefixlen + 1) nodes to the stack when it has
full paths from the root to leaves. For example, consider a trie with
max_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ...
0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with
.prefixlen = 8 make 9 nodes be written on the node stack with size 8.

Solutions

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