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().
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 42437a6386ffeaaf200731e73d723ea491f3fe7d, < c71d114ef68c95da5a82ec85a721ab31f5bd905b; >= 42437a6386ffeaaf200731e73d723ea491f3fe7d, < db66fb87c21e8ae724886e6a464dcbac562a64c6; >= 42437a6386ffeaaf200731e73d723ea491f3fe7d, < 757171d1369b3b47f36932d40a05a0715496dcab; >= 42437a6386ffeaaf200731e73d723ea491f3fe7d, < 93992c3d9629b02dccf6849238559d5c24f2dece; >= 42437a6386ffeaaf200731e73d723ea491f3fe7d, < 3ed51857a50f530ac7a1482e069dfbd1298558d4 |
| Linux | Linux | 5.11 |
References
- https://git.kernel.org/stable/c/3ed51857a50f530ac7a1482e069dfbd1298558d4Patch
- https://git.kernel.org/stable/c/757171d1369b3b47f36932d40a05a0715496dcabPatch
- https://git.kernel.org/stable/c/93992c3d9629b02dccf6849238559d5c24f2decePatch
- https://git.kernel.org/stable/c/c71d114ef68c95da5a82ec85a721ab31f5bd905bPatch
- https://git.kernel.org/stable/c/db66fb87c21e8ae724886e6a464dcbac562a64c6Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Timeline
- Published
- Jan 8, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Modified