PT-2025-8493 · Linux+2 · Linux Kernel+2

Syzbot · Published 2022-05-17 · Updated 2025-04-14 · CVE-2022-49560

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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

Description A slab-out-of-bounds read issue was discovered in the exfat clear bitmap function, triggered by calling truncate with a size of 0. This caused a read of size 8 at an invalid address, resulting in a BUG: KASAN: slab-out-of-bounds error. The issue was reported by Syzbot and is related to the exfat file system. The problem occurs when the cluster number is not validated, leading to an out-of-bounds access.

Recommendations To resolve this issue, update the Linux kernel to a version that includes the fix, which involves moving the is valid cluster() helper to a common header and adding validation for the cluster number in the exfat clear bitmap() and exfat set bitmap() functions. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2025-10250

CVE-2022-49560

SUSE-SU-2025:1176-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 1308

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49560.json · Exploit
• https://git.kernel.org/stable/c/82f723b8a5adf497f9e34c702a30ca7298615654 · Patch
• https://ubuntu.com/security/CVE-2022-49560 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-10250 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-49560 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49560 · Vendor Advisory
• https://git.kernel.org/stable/c/7c58b14b6f9cde9f69e7fa053ab73f6e013a7131 · Patch
• https://git.kernel.org/stable/c/2193286402df2d9c53294f7a858d5e6fd7346e08 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49560 · Security Note
• https://git.kernel.org/stable/c/64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://git.kernel.org/stable/c/c504167adc3248095a905fa0700a9693897cb5ed · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49560 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49560 · Vendor Advisory