CVE-2024-56774: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: btrfs: add a sanity check for btrfs root in btrfs_search_slot() Syzbot reports a null-ptr-deref in btrfs_search_slot(). The reproducer is using rescue=ibadroots, and the extent tree root is corrupted thus the extent tree is NULL. When scrub tries to search the extent tree to gather the needed extent info, btrfs_search_slot() doesn't check if the target root is NULL or not, resulting the null-ptr-deref. Add sanity check for btrfs root before using it in btrfs_search_slot().

Affected products

• Linux Linux Kernel: from 5.11, before 5.15.174 (fixed in 5.15.174); from 5.16, before 6.1.120 (fixed in 6.1.120); from 6.2, before 6.6.64 (fixed in 6.6.64); from 6.7, before 6.12.4 (fixed in 6.12.4); version 6.13 only

Published 2025-01-08. Last modified 2026-06-17.