Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-43171

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: EFI/CPER: don't dump the entire memory region The current logic at cper_print_fw_err() doesn't check if the error record length…

Published May 6, 2026CWE-191EPSS 0.16%

Overview

CVE-2026-43171 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:

EFI/CPER: don't dump the entire memory region

The current logic at cper_print_fw_err() doesn't check if the

error record length is big enough to handle offset. On a bad firmware,

if the ofset is above the actual record, length -= offset will

underflow, making it dump the entire memory.

The end result can be:

- the logic taking a lot of time dumping large regions of memory;

- data disclosure due to the memory dumps;

- an OOPS, if it tries to dump an unmapped memory region.

Fix it by checking if the section length is too small before doing

a hex dump.

[ rjw: Subject tweaks ]

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/02de64ab54b4bb0f1b21bb324aeff3b08612be33Refgit.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809dRefgit.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6Refgit.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ecRefgit.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334Refgit.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cffRefgit.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3Refgit.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43171?

CVE-2026-43171 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-2026-43171?

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-2026-43171?

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-2026-43171?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43171 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.

Related MEDIUM CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999