CVE-2026-64340

Summary

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")

Affected Software

VendorProductVersion RangeStatus
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < 11d069f85851997b4ea0adf242ed9672dc749b8faffected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < b4222c05066b252b451f9c8c4730b5b60824ea66affected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < 6462de75d2e370c7e74dcfb7b4ae79eb5a6a55eeaffected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < 0b57e5ddbd89df3bc367463de3d2ca66f99a1a5eaffected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < ab2bfd7bec4f134b377ec42f513e90c35db94160affected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < 766738ecf2b819e54d38763c8d1c8ae6cff14b39affected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < 9ba62966461a8e3cc593b62c56ec62eb2d80436daffected
LinuxLinux18bcbcfe9ca2308ebffb40068b51803da9315d97 < 62fc8eb1b1481051f7bab4aa93d79809053dd09faffected
LinuxLinux2.6.25affected
LinuxLinux0 < 2.6.25unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc3 <= *unaffected

Weaknesses

References