CVE-2023-52979: squashfs: harden sanity check in squashfs_read_xattr_id_table
First published: Thu Mar 27 2025(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=4.4.258<4.5 | |
| Linux Kernel | >=4.9.258<4.10 | |
| Linux Kernel | >=4.14.222<4.14.306 | |
| Linux Kernel | >=4.19.176<4.19.273 | |
| Linux Kernel | >=5.4.98<5.4.232 | |
| Linux Kernel | >=5.10.16<5.10.168 | |
| Linux Kernel | >=5.11<5.15.93 | |
| Linux Kernel | >=5.16<6.1.11 | |
| Linux Kernel | =6.2-rc1 | |
| Linux Kernel | =6.2-rc2 | |
| Linux Kernel | =6.2-rc3 | |
| Linux Kernel | =6.2-rc4 | |
| Linux Kernel | =6.2-rc5 | |
| Linux Kernel | =6.2-rc6 |
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Reference Links
- https://git.kernel.org/stable/c/cf5d6612092408157db6bb500c70bf6d67c40fbc
- https://git.kernel.org/stable/c/b30a74f83265c24d1d0842c6c3928cd2e775a3fb
- https://git.kernel.org/stable/c/db76fc535fbdfbf29fd0b93e49627537ad794c8c
- https://git.kernel.org/stable/c/de2785aa3448d1ee7be3ab47fd4a873025f1b3d7
- https://git.kernel.org/stable/c/b7398efe24a965cf3937b716c0b1011c201c5d6e
- https://git.kernel.org/stable/c/29e774dcb27116c06b9c57b1f1f14a1623738989
- https://git.kernel.org/stable/c/72e544b1b28325fe78a4687b980871a7e4101f76
Frequently Asked Questions
What is the severity of CVE-2023-52979?
CVE-2023-52979 is considered a medium severity vulnerability affecting the Linux kernel.
How do I fix CVE-2023-52979?
To fix CVE-2023-52979, you should upgrade to the latest version of the Linux kernel that includes the patch addressing this vulnerability.
What type of systems are affected by CVE-2023-52979?
CVE-2023-52979 affects systems running the Linux kernel, specifically those utilizing squashfs filesystems.
What is the impact of CVE-2023-52979?
The impact of CVE-2023-52979 can lead to incorrect processing of extended attributes when handling corrupted squashfs files.
Is CVE-2023-52979 a remote code execution vulnerability?
No, CVE-2023-52979 is not classified as a remote code execution vulnerability, but it can lead to potential data corruption.
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