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CVE-2026-31583

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: fix use-after-free in em28xx_v4l2_open() em28xx_v4l2_open() reads dev->v4l2 without holding dev->lock, creating…

Published Apr 24, 2026CWE-416EPSS 0.18%

Overview

CVE-2026-31583 is a high-severity vulnerability. It was published on April 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

media: em28xx: fix use-after-free in em28xx_v4l2_open()

em28xx_v4l2_open() reads dev->v4l2 without holding dev->lock,

creating a race with em28xx_v4l2_init()'s error path and

em28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct

and set dev->v4l2 to NULL under dev->lock.

This race leads to two issues:

- use-after-free in v4l2_fh_init() when accessing vdev->ctrl_handler,

since the video_device is embedded in the freed em28xx_v4l2 struct.

- NULL pointer dereference in em28xx_resolution_set() when accessing

v4l2->norm, since dev->v4l2 has been set to NULL.

Fix this by moving the mutex_lock() before the dev->v4l2 read and

adding a NULL check for dev->v4l2 under 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/2cbf81f76842e46bdf25823c70e1db4044a65678Refgit.kernel.org/stable/c/38a327221f7f765e7d853b7bafe47e342441ec85Refgit.kernel.org/stable/c/3c0283a59e36e3707c4a81f4952e362d31f876b8Refgit.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324Refgit.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972Refgit.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0ddRefgit.kernel.org/stable/c/a66485a934c7187ae8e36517d40615fa2e961cffRefgit.kernel.org/stable/c/b5d141ea15f173f15b9f0a72965902f3428c0d92Refgit.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31583?

CVE-2026-31583 is a high-severity vulnerability. It was published on April 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-31583?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2026-31583?

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-2026-31583?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31583 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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