CVE-2023-52979
Published: March 29, 2025Last modified: March 29, 2025
Description
In the Linux kernel, the following vulnerability has been resolved: squashfs: harden sanity check in squashfs_read_xattr_id_table While mounting a corrupted filesystem, a signed integer '*xattr_ids' can become less than zero. This leads to the incorrect computation of 'len' and 'indexes' values which can cause null-ptr-deref in copy_bio_to_actor() or out-of-bounds accesses in the next sanity checks inside squashfs_read_xattr_id_table(). Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/29e774dcb27116c06b9c57b1f1f14a1623738989
- https://git.kernel.org/stable/c/72e544b1b28325fe78a4687b980871a7e4101f76
- https://git.kernel.org/stable/c/b30a74f83265c24d1d0842c6c3928cd2e775a3fb
- https://git.kernel.org/stable/c/b7398efe24a965cf3937b716c0b1011c201c5d6e
- https://git.kernel.org/stable/c/cf5d6612092408157db6bb500c70bf6d67c40fbc
- https://git.kernel.org/stable/c/db76fc535fbdfbf29fd0b93e49627537ad794c8c
- https://git.kernel.org/stable/c/de2785aa3448d1ee7be3ab47fd4a873025f1b3d7