CVE-2024-56774
Medium
Description
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().
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedJan 8, 2025
First seenJan 8, 2025
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel5.15.174, 6.1.120, 6.6.64, 6.12.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.11 ≤ v < 5.15.174, 5.16 ≤ v < 6.1.120, 6.2 ≤ v < 6.6.64, 6.7 ≤ v < 6.12.4, 6.13 | 5.15.174, 6.1.120, 6.6.64, 6.12.4 |
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