High 7.8Published Jul 25, 2026

CVE-2026-64340USB: legousbtower: fix use-after-free on disconnect race

Updated under an hour ago (Oct 26, 2026, 2:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: USB: legousbtower: 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")

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	18bcbcfe9ca2308ebffb40068b51803da9315d97 builds before 11d069f85851997b4ea0adf242ed9672dc749b8f; from 18bcbcfe9ca2308ebffb40068b51803da9315d97 before b4222c05066b252b451f9c8c4730b5b60824ea66; from 18bcbcfe9ca2308ebffb40068b51803da9315d97 before 6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee; 18bcbcfe9ca2308ebffb40068b51803da9315d97 builds before 0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e; from 18bcbcfe9ca2308ebffb40068b51803da9315d97 before ab2bfd7bec4f134b377ec42f513e90c35db94160; from 18bcbcfe9ca2308ebffb40068b51803da9315d97 before 766738ecf2b819e54d38763c8d1c8ae6cff14b39; 18bcbcfe9ca2308ebffb40068b51803da9315d97 builds before 9ba62966461a8e3cc593b62c56ec62eb2d80436d; from 18bcbcfe9ca2308ebffb40068b51803da9315d97 before 62fc8eb1b1481051f7bab4aa93d79809053dd09f	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.25 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 7.2; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/11d069f85851997b4ea0adf242ed9672dc749b8f	patch
https://git.kernel.org/stable/c/b4222c05066b252b451f9c8c4730b5b60824ea66	patch
https://git.kernel.org/stable/c/6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee	patch
https://git.kernel.org/stable/c/0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e	patch
https://git.kernel.org/stable/c/ab2bfd7bec4f134b377ec42f513e90c35db94160	patch
https://git.kernel.org/stable/c/766738ecf2b819e54d38763c8d1c8ae6cff14b39	patch
https://git.kernel.org/stable/c/9ba62966461a8e3cc593b62c56ec62eb2d80436d	patch
https://git.kernel.org/stable/c/62fc8eb1b1481051f7bab4aa93d79809053dd09f	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.