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CVE-2022-49955

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: Fix RTAS MSR[HV] handling for Cell The semi-recent changes to MSR handling when entering RTAS (firmware) cause cr…

Published Jun 18, 2025CWE-476EPSS 0.20%

Overview

CVE-2022-49955 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

powerpc/rtas: Fix RTAS MSR[HV] handling for Cell

The semi-recent changes to MSR handling when entering RTAS (firmware)

cause crashes on IBM Cell machines. An example trace:

kernel tried to execute user page (2fff01a8) - exploit attempt? (uid: 0)

BUG: Unable to handle kernel instruction fetch

Faulting instruction address: 0x2fff01a8

Oops: Kernel access of bad area, sig: 11 [#1]

BE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=4 NUMA Cell

Modules linked in:

CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.0.0-rc2-00433-gede0a8d3307a #207

NIP: 000000002fff01a8 LR: 0000000000032608 CTR: 0000000000000000

REGS: c0000000015236b0 TRAP: 0400 Tainted: G W (6.0.0-rc2-00433-gede0a8d3307a)

MSR: 0000000008001002 <ME,RI> CR: 00000000 XER: 20000000

...

NIP 0x2fff01a8

LR 0x32608

Call Trace:

0xc00000000143c5f8 (unreliable)

.rtas_call+0x224/0x320

.rtas_get_boot_time+0x70

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/8b08d4f97233d8e58fff2fd9d5f86397a49733c5Refgit.kernel.org/stable/c/91926d8b7e71aaf5f84f0cf208fc5a8b7a761050

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49955?

CVE-2022-49955 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49955?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49955?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49955?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49955 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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