Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-43484

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mmc: core: Avoid bitfield RMW for claim/retune flags Move claimed and retune control flags out of the bitfield word to avoid un…

Published May 13, 2026EPSS 0.16%

Overview

CVE-2026-43484 is a medium-severity vulnerability. It was published on May 13, 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:

mmc: core: Avoid bitfield RMW for claim/retune flags

Move claimed and retune control flags out of the bitfield word to

avoid unrelated RMW side effects in asynchronous contexts.

The host->claimed bit shared a word with retune flags. Writes to claimed

in __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite

other bits when concurrent updates happen in other contexts, triggering

spurious WARN_ON(!host->claimed). Convert claimed, can_retune,

retune_now and retune_paused to bool to remove shared-word coupling.

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/0e06cc511c61cff1591e5435a207759adcc76b6dRefgit.kernel.org/stable/c/270277c2ab631044867adb1bd2f2433d3892de6eRefgit.kernel.org/stable/c/41dce4dae583a8ce06a7ebf4ce704c46a142957cRefgit.kernel.org/stable/c/45038e03f15e992c48603fff8c6b1c9be5397ac9Refgit.kernel.org/stable/c/901084c51a0a8fb42a3f37d2e9c62083c495f824Refgit.kernel.org/stable/c/bb7fc2498c3bb25fa6a91f22f4760005325cfbd5Refgit.kernel.org/stable/c/d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43484?

CVE-2026-43484 is a medium-severity vulnerability. It was published on May 13, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43484?

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-2026-43484?

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-2026-43484?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43484 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