PT-2025-8621 · Linux+3 · Linux Kernel+3

Marc Dionne · Published 2022-06-21 · Updated 2025-04-14 · CVE-2022-49688

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A issue in the Linux kernel has been resolved, related to the dynamic root getattr in the afs module. The problem occurred when the afs getattr function consulted the server without accounting for pseudo-inodes employed by the dynamic root-type afs superblock, which do not have a volume or server to access. This resulted in a kernel NULL pointer dereference when a directory in /afs was stat'd. The error manifested as an oops with a BUG message indicating a kernel NULL pointer dereference.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-03999

CVE-2022-49688

RHSA-2023:2458

RHSA-2023_2458

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Suse

References · 1339

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49688.json · Exploit
• https://osv.dev/vulnerability/CVE-2022-49688 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03999 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://git.kernel.org/stable/c/65c24caf1b9f5b08397c6e805ec24ebc390c6e4d · Patch
• https://git.kernel.org/stable/c/7844ceada44eca740d31beb3d97b8511b1ca0a9b · Patch
• https://git.kernel.org/stable/c/7b564e3254b7db5fbfbf11a824627a6c31b932b4 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-49688 · Vendor Advisory
• https://git.kernel.org/stable/c/2b2bba96526f25f2eba74ecadb031de2e05a83ce · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://git.kernel.org/stable/c/e3a232e5767051483ffad4cef7d0a89d292a192b · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49688 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49688 · Security Note