PT-2025-8374 · Linux+3 · Linux Kernel+3

Published 2022-01-01 · Updated 2026-03-14 · CVE-2022-49440

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 versions prior to the version where the MSR[RI] issue is fixed

Description The issue arises from the Linux kernel's handling of the MSR[RI] bit when calling RTAS. RTAS is expected to be called with MSR[RI] set as specified in the PAPR+ section "7.2.1 Machine State". However, the kernel unsets MSR[RI] when entering RTAS without a valid reason. This can lead to a panic when hitting the watchdog interrupt while running in RTAS, resulting in an unrecoverable system reset. The estimated number of potentially affected devices is not provided.

Recommendations As a temporary workaround, consider reviewing and adjusting the MSR computation before calling RTAS to ensure MSR[RI] is set correctly. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Uncontrolled Recursion

Weakness Enumeration

CWE-674

Related Identifiers

BDU:2026-02614

CVE-2022-49440

RHSA-2022:8267

RHSA-2023:0512

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

Debian

Linux Kernel

Suse

References · 1334

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49440.json · Exploit
• https://git.kernel.org/stable/c/5f4367448f6817c8a0e94dc9736ed84fa8eee4a3 · Patch
• https://osv.dev/vulnerability/CVE-2022-49440 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://git.kernel.org/stable/c/c9c41f0273826a13ac93124e66a4ff45df281ba0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49440 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49440 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49440 · Vendor Advisory
• https://git.kernel.org/stable/c/5ca40fcf0da0ce2b5bc44e7d8b036535955f2e3d · Patch
• https://cve.org/CVERecord?id=CVE-2022-49440 · Security Note
• https://ubuntu.com/security/CVE-2022-49440 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02614 · Security Note
• https://git.kernel.org/stable/c/b6b1c3ce06ca438eb24e0f45bf0e63ecad0369f5 · Patch
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2022-49440 · Vendor Advisory