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CVE-2026-43124

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: pstore: ram_core: fix incorrect success return when vmap() fails In persistent_ram_vmap(), vmap() may return NULL on failure.

Published May 6, 2026CWE-476EPSS 0.16%

Overview

CVE-2026-43124 is a medium-severity vulnerability. It was published on May 6, 2026 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:

pstore: ram_core: fix incorrect success return when vmap() fails

In persistent_ram_vmap(), vmap() may return NULL on failure.

If offset is non-zero, adding offset_in_page(start) causes the function

to return a non-NULL pointer even though the mapping failed.

persistent_ram_buffer_map() therefore incorrectly returns success.

Subsequent access to prz->buffer may dereference an invalid address

and cause crashes.

Add proper NULL checking for vmap() failures.

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/05363abc7625cf18c96e67f50673cd07f11da5e9Refgit.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003Refgit.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70ebRefgit.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77cRefgit.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75Refgit.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9Refgit.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441Refgit.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43124?

CVE-2026-43124 is a medium-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43124?

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-2026-43124?

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-2026-43124?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43124 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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