CVE-2026-64344

USB: idmouse: fix use-after-free on disconnect race

Published Jul 25, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Description

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")

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< 31e75fed8f90cfea9f8285e7ed135b0e452bf872
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< 8d53b14ad4ccbff6d306b3a39c812303f4a87d41
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< f62622e947f82a3854a8502d09492ffbdeb252b4
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< 60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< 54c2b7356b4aeea467f9fb13b85e9e036bc428cb
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< e88cff5fbaa629f3cab45c8b46f395d62c2eb515
`54d2bc068fd21bcb096660938bce7c7265613a24`	affected	< ff002c153f9722caece3983cc23dc4d9d4652cb4

Linux

affected

Version	Status	Constraints
`2.6.24`	affected	—
`0`	unaffected	< 2.6.24
`5.10.261`	unaffected	≤ 5.10.*
`5.15.212`	unaffected	≤ 5.15.*
`6.1.178`	unaffected	≤ 6.1.*
`6.6.145`	unaffected	≤ 6.6.*
`6.12.96`	unaffected	≤ 6.12.*
`6.18.39`	unaffected	≤ 6.18.*
`7.1.4`	unaffected	≤ 7.1.*
`7.2`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:-::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc2::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc3::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc4::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc5::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc6::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc7::::::
	cpe:2.3:o:linux:linux_kernel:2.6.24:rc8::::::
	cpe:2.3:o:linux:linux_kernel:7.2:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.2:rc2::::::

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[54d2bc068fd21bcb096660938bce7c7265613a24,31e75fed8f90cfea9f8285e7ed135b0e452bf872)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,8d53b14ad4ccbff6d306b3a39c812303f4a87d41)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,f62622e947f82a3854a8502d09492ffbdeb252b4)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,54c2b7356b4aeea467f9fb13b85e9e036bc428cb)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,e88cff5fbaa629f3cab45c8b46f395d62c2eb515)`	affected	code_commit	—
`[54d2bc068fd21bcb096660938bce7c7265613a24,ff002c153f9722caece3983cc23dc4d9d4652cb4)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`2.6.24`	affected	semver	—
`[0,2.6.24)`	unaffected	generic	—
`[5.10.261,5.11.0)`	unaffected	semver	—
`[5.15.212,5.16.0)`	unaffected	semver	—
`[6.1.178,6.2.0)`	unaffected	semver	—
`[6.6.145,6.7.0)`	unaffected	semver	—
`[6.12.96,6.13.0)`	unaffected	semver	—
`[6.18.39,6.19.0)`	unaffected	semver	—
`[7.1.4,7.2.0)`	unaffected	semver	—
`[7.2-rc3,*)`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4717-1	linux security update
Debian DLA	DLA-4720-1	linux security update
Debian DLA	DLA-4723-1	linux-6.1 security update
Debian DLA	DLA-4724-1	linux-6.12 new package
Ubuntu USN	USN-8726-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8727-1	Linux kernel (OEM) vulnerabilities
Ubuntu USN	USN-8728-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8760-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8726-2	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8726-3	Linux kernel (IBM) vulnerabilities
Ubuntu USN	USN-8800-1	Linux kernel (NVIDIA BaseOS) vulnerabilities
Ubuntu USN	USN-8760-2	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8726-4	Linux kernel vulnerabilities
Ubuntu USN	USN-8728-2	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8728-3	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-8876-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8875-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8877-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8878-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8879-1	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-8875-2	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8917-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8918-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9002-1	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-9024-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9025-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9026-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-9040-1	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-9066-1	Linux kernel (HWE) vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.126% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/31e75fed8f90cfea9f8285e7ed135b0e452bf872
https://git.kernel.org/stable/c/54c2b7356b4aeea467f9fb13b85e9e036bc428cb
https://git.kernel.org/stable/c/60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09
https://git.kernel.org/stable/c/8d53b14ad4ccbff6d306b3a39c812303f4a87d41
https://git.kernel.org/stable/c/d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4
https://git.kernel.org/stable/c/e88cff5fbaa629f3cab45c8b46f395d62c2eb515
https://git.kernel.org/stable/c/f62622e947f82a3854a8502d09492ffbdeb252b4
https://git.kernel.org/stable/c/ff002c153f9722caece3983cc23dc4d9d4652cb4
https://lore.kernel.org/linux-cve-announce/2026072516-CVE-2026-64344-3b7c@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-64344
https://www.cve.org/CVERecord?id=CVE-2026-64344

History

Nov 7, 2026 7:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 3, 2026 4:15 PM Weaknesses updated. Affected versions updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-416
CPEs		cpe:2.3:o:linux:linux_kernel:2.6.24:-:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc2:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc3:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc4:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc5:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc6:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc7:::::: cpe:2.3:o:linux:linux_kernel:2.6.24:rc8:::::: cpe:2.3:o:linux:linux_kernel:7.2:rc1:::::: cpe:2.3:o:linux:linux_kernel:7.2:rc2::::::
Metrics	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`	cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Aug 1, 2026 2:30 AM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses	CWE-416

Jul 30, 2026 12:15 AM Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-364
References		https://lore.kernel.org/linux-cve-announce/2026072516-CVE-2026-64344-3b7c@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-64344 https://www.cve.org/CVERecord?id=CVE-2026-64344
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Jul 26, 2026 2:30 AM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-416

Jul 25, 2026 9:30 AM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
Description		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")
Title		USB: idmouse: fix use-after-free on disconnect race
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/31e75fed8f90cfea9f8285e7ed135b0e452bf872 https://git.kernel.org/stable/c/54c2b7356b4aeea467f9fb13b85e9e036bc428cb https://git.kernel.org/stable/c/60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09 https://git.kernel.org/stable/c/8d53b14ad4ccbff6d306b3a39c812303f4a87d41 https://git.kernel.org/stable/c/d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4 https://git.kernel.org/stable/c/e88cff5fbaa629f3cab45c8b46f395d62c2eb515 https://git.kernel.org/stable/c/f62622e947f82a3854a8502d09492ffbdeb252b4 https://git.kernel.org/stable/c/ff002c153f9722caece3983cc23dc4d9d4652cb4