PT-2025-26017 · Linux+3 · Linux Kernel+3

Published 2022-05-10 · Updated 2025-07-16 · CVE-2022-50091

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

AV:L/AC:H/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 resolved. The issue is related to the csdlock debug kernel-boot parameter, which is parsed by the early param() function csdlock debug(). If set, csdlock debug() invokes static branch enable() to enable the csd lock wait feature. However, this triggers a panic on arm64 for kernels built with CONFIG SPARSEMEM=y and CONFIG SPARSEMEM VMEMMAP=n due to a NULL dereference. The problem also affects powerpc because early param() functions are invoked earlier than jump label init(), resulting in static key enable() failures.

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

Exploit

Improper Initialization

NULL Pointer Dereference

Weakness Enumeration

CWE-665

CWE-476

Related Identifiers

BDU:2026-02804

CVE-2022-50091

RHSA-2023:6583

RHSA-2023_6583

SUSE-SU-2025:02308-1

SUSE-SU-2025:02320-1

SUSE-SU-2025:02334-1

SUSE-SU-2025_02308-1

SUSE-SU-2025_02334-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Suse

References · 448

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50091.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2022-50091 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02308-1 · Vendor Advisory
• https://git.kernel.org/stable/c/05de9e2e33b1625c71aee69e353fe906dd2be88a · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50091 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02334-1 · Vendor Advisory
• https://git.kernel.org/stable/c/b480d1e9a8c11ecc1c99dc01814b28e3103bd0a0 · Patch
• https://git.kernel.org/stable/c/9c9b26b0df270d4f9246e483a44686fca951a29c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-50091 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50091 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-50091 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02320-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-50091 · Vendor Advisory
• https://git.kernel.org/stable/c/d2cbdbe22b5f190055d2d0ae92e7454479343a30 · Patch
• https://bdu.fstec.ru/vul/2026-02804 · Security Note