PT-2026-35002 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-28 · CVE-2026-31650

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 mmc vub300 driver. The driver maintains an explicit reference count for the controller and its driver data, but the last reference could be dropped after the driver was unbound. This occurs because the controller allocation was device managed. Additionally, the lifetime was incorrectly tied to the parent USB device instead of the interface, which could lead to memory leaks if the driver was unbound without the device being physically disconnected, such as during probe deferral.

Recommendations Revert to non-managed allocation of the controller.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-31650

Affected Products

Linux Kernel

References · 13

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31650 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31650 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31650 · Vendor Advisory
• https://git.kernel.org/stable/c/ef0448c569b37ceabdd038e9faa311e5179127b0 · Patch
• https://ubuntu.com/security/CVE-2026-31650 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31650 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31650 · Vendor Advisory
• https://git.kernel.org/stable/c/ea7468f61be033f4e18b95f2912010ed1d175d75 · Patch
• https://git.kernel.org/stable/c/8f4d20a710225ec7a565f6a0459862d3b1f32330 · Patch
• https://twitter.com/CVEnew/status/2047731930469122499 · Twitter Post
• https://git.kernel.org/linus/8f4d20a710225ec7a565f6a0459862d3b1f32330 · Note
• https://twitter.com/vuldb/status/2047909274794541523 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2047777421672186339 · Twitter Post