PT-2025-8185 · Linux+3 · Linux Kernel+3

Published 2022-03-21 · Updated 2025-09-29 · CVE-2022-49257

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 NULL dereference issue in the watch queue set size() function can occur when the error cleanup code attempts to free buffer pages that were not allocated. This can lead to a null pointer dereference, resulting in a BUG: KASAN: null-ptr-deref error. The issue arises because the free page() function cannot handle a NULL pointer.

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

ALSA-2025_16880

BDU:2026-04312

CVE-2022-49257

RHSA-2023:6583

RHSA-2023_6583

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 · 1337

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49257.json · Exploit
• https://git.kernel.org/stable/c/b6f5ad3e45d19f9c4ee3e8a2aff829f28d68591d · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49257 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://git.kernel.org/stable/c/112a2f9b0a8457794095a0450598f150724ec456 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-49257 · Vendor Advisory
• https://git.kernel.org/stable/c/695c47cea02b9101e2fc2e7d36d552128592b347 · Patch
• https://bdu.fstec.ru/vul/2026-04312 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://git.kernel.org/stable/c/5ae75b4ed30322b42abaa75ef1b784addfdb7dc9 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49257 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49257 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49257 · Vendor Advisory