PT-2025-13325 · Linux+3 · Linux Kernel+3

Published 2023-01-17 · Updated 2025-05-28 · CVE-2023-52979

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:L/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been identified, specifically in the squashfs component. The issue arises when mounting a corrupted filesystem, causing a signed integer xattr ids to become less than zero. This leads to incorrect computations of len and indexes values, potentially resulting in null pointer dereferences in copy bio to actor() or out-of-bounds accesses in subsequent sanity checks within squashfs read xattr id table(). The vulnerability was discovered by the Linux Verification Center using Syzkaller.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

NULL Pointer Dereference

Weakness Enumeration

CWE-125

CWE-476

Related Identifiers

BDU:2025-06267

CVE-2023-52979

OPENSUSE-SU-2025_1195-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1195-1

SUSE-SU-2025:1241-1

SUSE-SU-2025:1293-1

SUSE-SU-2025_1195-1

SUSE-SU-2025_1241-1

SUSE-SU-2025_1293-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 1492

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cve_2022_0995_watch_queue.rb · Exploit
• 🔥 https://github.com/qazbnm456/awesome-cve-poc/blob/master/CVE-2017-5753.md · Exploit
• 🔥 https://github.com/Bonfee/CVE-2022-0995 · Exploit
• 🔥 https://github.com/TurtleARM/CVE-2023-0179-PoC · Exploit
• 🔥 https://github.com/H4K6/CVE-2023-0179-PoC · Exploit
• 🔥 https://github.com/EdwardOwusuAdjei/Spectre-PoC · Exploit
• https://git.kernel.org/stable/c/29e774dcb27116c06b9c57b1f1f14a1623738989 · Patch
• https://osv.dev/vulnerability/CVE-2023-52979 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1293-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-52979 · Security Note
• https://ubuntu.com/security/CVE-2023-52979 · Vendor Advisory
• https://git.kernel.org/stable/c/b7398efe24a965cf3937b716c0b1011c201c5d6e · Patch
• https://cve.org/CVERecord?id=CVE-2023-52979 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-52979 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory