NVD / CVE Program· CNA Linux

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

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 31e75fed8f90cfea9f8285e7ed135b0e452bf872, 54c2b7356b4aeea467f9fb13b85e9e036bc428cb, 60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09.

Low priority for now. Upgrade to Linux Linux 31e75fed8f90cfea9f8285e7ed135b0e452bf872, 54c2b7356b4aeea467f9fb13b85e9e036bc428cb, 60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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")

Memory safety

Published: Jul 25, 2026
Updated: Nov 6, 2026
EPSS: 0.1% · 2th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 2.6.24affected
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before 31e75fed8f90cfea9f8285e7ed135b0e452bf872affected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before 8d53b14ad4ccbff6d306b3a39c812303f4a87d41affected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before f62622e947f82a3854a8502d09492ffbdeb252b4affected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before 60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09affected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4affected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before 54c2b7356b4aeea467f9fb13b85e9e036bc428cbaffected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before e88cff5fbaa629f3cab45c8b46f395d62c2eb515affected · git
- 54d2bc068fd21bcb096660938bce7c7265613a24 and later · before ff002c153f9722caece3983cc23dc4d9d4652cb4affected · git
- before 2.6.24not affected · semver

Affected versions · NVD (9)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel2.6.24.1 and later · before 5.10.261
linux linux kernel5.11 and later · before 5.15.212
linux linux kernel5.16 and later · before 6.1.178
linux linux kernel6.2 and later · before 6.6.145
linux linux kernel6.7 and later · before 6.12.96
linux linux kernel6.13 and later · before 6.18.39
linux linux kernel6.19 and later · before 7.1.4
linux linux kernel2.6.24
linux linux kernel7.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.180-1	6.1.180-1
Debian:12	linux-6.12	before 6.12.100-1~deb12u1	6.12.100-1~deb12u1
Debian:13	linux	before 6.12.96-1	6.12.96-1
Debian:14	linux	before 7.1.4-1	7.1.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-64342Jul 25, 2026 · USB: iowarrior: fix use-after-free on disconnect
31Monitor
← EarlierCVE-2026-64343Jul 25, 2026 · USB: ldusb: fix use-after-free on disconnect race
31Monitor
Later →CVE-2026-64345Jul 25, 2026 · usb: gadget: f_printer: take kref only for successful open
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	31e75fed8f90cfea9f8285e7ed135b0e452bf872	Vendor (CNA)
Linux Linux	54c2b7356b4aeea467f9fb13b85e9e036bc428cb	Vendor (CNA)
Linux Linux	60fc5ef4ecea3e3d1fe556cecf53ddd13096ef09	Vendor (CNA)
Linux Linux	8d53b14ad4ccbff6d306b3a39c812303f4a87d41	Vendor (CNA)
Linux Linux	d0f61acb51a8c8f3fd41c303ddb7770cd83e7ed4	Vendor (CNA)
Linux Linux	e88cff5fbaa629f3cab45c8b46f395d62c2eb515	Vendor (CNA)
Linux Linux	f62622e947f82a3854a8502d09492ffbdeb252b4	Vendor (CNA)
Linux Linux	ff002c153f9722caece3983cc23dc4d9d4652cb4	Vendor (CNA)
debian:linux	6.1.180-1 · Debian:12	Package registry (OSV)
debian:linux-6.12	6.12.100-1~deb12u1 · Debian:12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (2)

SSVC exploitation— → noneNov 6, 2026, 6:07 PM UTC
Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/31e75fed8f90cfea9f8285e7ed135b0e452bf872

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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