CVE-2026-64344: USB: idmouse: fix use-after-free on disconnect race

High 7.8 EPSS 0.1% Linux kernel

In the Linux kernel, the following vulnerability has been resolved: USB: idmouse: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")

CVE-2026-64344CVE identifier
7.8CVSS 3.1 base score (high)
0.1%EPSS: chance of exploitation in the next 30 days (higher than 2% of CVEs)
2026-07-25published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run Linux kernel and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
Reboot into the new kernel (uname -r to confirm); live patching (kpatch, Ubuntu Livepatch, SUSE kGraft/klp) can defer the reboot for some CVEs

Affected and fixed versions

Affected:

Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before 31e75fed8f90cfea9f8285e7ed135b0e452bf872
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before 8d53b14ad4ccbff6d306b3a39c812303f4a87d41
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before f62622e947f82a3854a8502d09492ffbdeb252b4
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before 60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before 54c2b7356b4aeea467f9fb13b85e9e036bc428cb
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before e88cff5fbaa629f3cab45c8b46f395d62c2eb515
Linux Linux 54d2bc068fd21bcb096660938bce7c7265613a24 to before ff002c153f9722caece3983cc23dc4d9d4652cb4
Linux Linux 2.6.24

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Debian

sudo apt update
sudo apt install --only-upgrade linux-image-amd64

Ubuntu

sudo apt update
sudo apt install --only-upgrade linux-image-generic (or the installed flavour: linux-image-aws, -azure, -gcp, -virtual)

RHEL, AlmaLinux, Rocky, Oracle

sudo dnf upgrade --refresh kernel

Fedora

sudo dnf upgrade --refresh kernel

SUSE / openSUSE

sudo zypper refresh
sudo zypper update kernel-default

Amazon Linux

sudo dnf upgrade --releasever=latest kernel kernel6.12

Arch Linux

sudo pacman -Syu

Alpine

apk update && apk upgrade linux-lts linux-virt

FreeBSD

not Linux

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

Fix status in Linux distributions

Release	Package	Status	Fixed version / advisory
Debian 12	`linux`	fixed	`6.1.180-1`
Debian 13	`linux`	fixed	`6.12.96-1`
Debian testing	`linux`	fixed	`7.1.4-1`
Debian 12	`linux-6.12`	fixed	`6.12.100-1~deb12u1`
Red Hat Enterprise Linux 9	`kernel`	fix deferred
Red Hat Enterprise Linux 9	`kernel-rt`	fix deferred
Red Hat Enterprise Linux 8	`kernel`	fix deferred
Red Hat Enterprise Linux 8	`kernel-rt`	fix deferred
Red Hat Enterprise Linux 7	`kernel`	fix deferred
Red Hat Enterprise Linux 7	`kernel-rt`	fix deferred
Red Hat Enterprise Linux 6	`kernel`	out of support scope
Red Hat Enterprise Linux 10	`kernel`	fix deferred

From the Debian security tracker, Ubuntu CVE tracker and Red Hat Security Data API, refreshed every few hours.

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC. Always confirm with your vendor's advisory.