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CVE-2026-23434

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: serialize lock/unlock against other NAND operations nand_lock() and nand_unlock() call into chip->ops.lock_area/u…

Published Apr 3, 2026EPSS 0.13%

Overview

CVE-2026-23434 is a high-severity vulnerability. It was published on April 3, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. 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:

mtd: rawnand: serialize lock/unlock against other NAND operations

nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area

without holding the NAND device lock. On controllers that implement

SET_FEATURES via multiple low-level PIO commands, these can race with

concurrent UBI/UBIFS background erase/write operations that hold the

device lock, resulting in cmd_pending conflicts on the NAND controller.

Add nand_get_device()/nand_release_device() around the lock/unlock

operations to serialize them against all other NAND controller access.

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/28ea836cc44cb8b89c1c174707ead0c1133c60e9Refgit.kernel.org/stable/c/5fd5c078af23cb353507aa522e09d557d7eaef04Refgit.kernel.org/stable/c/a80291e577b44593a724d6cd64c14337c78f194dRefgit.kernel.org/stable/c/bab2bc6e850a697a23b9e5f0e21bb8c187615e95Refgit.kernel.org/stable/c/ce5229e78078e437704157eb542f43a6f83b429bRefgit.kernel.org/stable/c/f25446e2c28939753d3b62d34dfda49952b2557dRefgit.kernel.org/stable/c/f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2Refgit.kernel.org/stable/c/fe4a73c3dd48308149d57a10c2761e1d36ced7baRefcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23434?

CVE-2026-23434 is a high-severity vulnerability. It was published on April 3, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-23434?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23434?

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-2026-23434?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23434 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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