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CVE-2026-23357

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock in error path of mcp251x_open The mcp251x_open() function call free_irq() in its error path with the…

Published Mar 25, 2026CWE-667EPSS 0.10%

Overview

CVE-2026-23357 is a medium-severity vulnerability. It was published on March 25, 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:

can: mcp251x: fix deadlock in error path of mcp251x_open

The mcp251x_open() function call free_irq() in its error path with the

mpc_lock mutex held. But if an interrupt already occurred the

interrupt handler will be waiting for the mpc_lock and free_irq() will

deadlock waiting for the handler to finish.

This issue is similar to the one fixed in commit 7dd9c26bd6cf ("can:

mcp251x: fix deadlock if an interrupt occurs during mcp251x_open") but

for the error path.

To solve this issue move the call to free_irq() after the lock is

released. Setting `priv->force_quit = 1` beforehand ensure that the IRQ

handler will exit right away once it acquired the lock.

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/256f0cff6e946c570392bda1d01a65e789a7afd0Refgit.kernel.org/stable/c/38063cc435b69d56e76f947c10d336fcb2953508Refgit.kernel.org/stable/c/416c18ecddafab0ed09be1e7b9d2f448f3d4db16Refgit.kernel.org/stable/c/739454057572cb0948658d1142f3fa2c6966465cRefgit.kernel.org/stable/c/ab3f894de216f4a62adc3b57e9191888cbf26885Refgit.kernel.org/stable/c/b73832292cd914e87a55e863ba4413a907e7db6bRefgit.kernel.org/stable/c/d27f12c3f5e85efc479896af4a69eccb37f75e8eRefgit.kernel.org/stable/c/e728f444c913a91d290d1824b4770780bbd6378e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23357?

CVE-2026-23357 is a medium-severity vulnerability. It was published on March 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23357?

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-2026-23357?

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-2026-23357?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23357 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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