PT-2026-34935 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-26 · CVE-2026-31583

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free issue exists in the em28xx driver. The function em28xx v4l2 open() reads the dev->v4l2 variable without holding the dev->lock, which creates a race condition with the error path of em28xx v4l2 init() and the em28xx v4l2 fini() function. Both of these functions free the em28xx v4l2 structure and set dev->v4l2 to NULL while holding the lock. This race condition can lead to a use-after-free in v4l2 fh init() when accessing vdev->ctrl handler or a NULL pointer dereference in em28xx resolution set() when accessing v4l2->norm.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-31583

ECHO-AE8B-4007-F974

OPENSUSE-SU-2026:10703-1

Affected Products

Linux Kernel

References · 81

• https://nvd.nist.gov/vuln/detail/CVE-2026-31583 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10703-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31583 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-31583 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31583 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31583 · Vendor Advisory
• https://git.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0dd · Patch
• https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f · Patch
• https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31583 · Vendor Advisory
• https://git.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31583 · Security Note
• https://git.kernel.org/stable/c/a66485a934c7187ae8e36517d40615fa2e961cff · Patch
• https://ubuntu.com/security/CVE-2026-31583 · Vendor Advisory
• https://git.kernel.org/stable/c/b5d141ea15f173f15b9f0a72965902f3428c0d92 · Patch