{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64340","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T15:36:31.781Z","datePublished":"2026-07-25T08:50:03.896Z","dateUpdated":"2026-08-17T04:53:43.875Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T04:53:43.875Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: legousbtower: fix use-after-free on disconnect race\n\nmutex_unlock() may access the mutex structure after releasing the lock\nand therefore cannot be used to manage lifetime of objects directly\n(unlike spinlocks and refcounts). [1][2]\n\nUse a kref to release the driver data to avoid use-after-free in\nmutex_unlock() when release() races with disconnect().\n\n[1] a51749ab34d9 (\"locking/mutex: Document that mutex_unlock() is\n                   non-atomic\")\n[2] 2b9d9e0a9ba0 (\"locking/mutex: Clarify that mutex_unlock(), and most\n                   other sleeping locks, can still use the lock object\n                   after it's unlocked\")"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/legousbtower.c"],"versions":[{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"11d069f85851997b4ea0adf242ed9672dc749b8f","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"b4222c05066b252b451f9c8c4730b5b60824ea66","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"ab2bfd7bec4f134b377ec42f513e90c35db94160","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"766738ecf2b819e54d38763c8d1c8ae6cff14b39","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"9ba62966461a8e3cc593b62c56ec62eb2d80436d","status":"affected","versionType":"git"},{"version":"18bcbcfe9ca2308ebffb40068b51803da9315d97","lessThan":"62fc8eb1b1481051f7bab4aa93d79809053dd09f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/legousbtower.c"],"versions":[{"version":"2.6.25","status":"affected"},{"version":"0","lessThan":"2.6.25","status":"unaffected","versionType":"semver"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/11d069f85851997b4ea0adf242ed9672dc749b8f"},{"url":"https://git.kernel.org/stable/c/b4222c05066b252b451f9c8c4730b5b60824ea66"},{"url":"https://git.kernel.org/stable/c/6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee"},{"url":"https://git.kernel.org/stable/c/0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e"},{"url":"https://git.kernel.org/stable/c/ab2bfd7bec4f134b377ec42f513e90c35db94160"},{"url":"https://git.kernel.org/stable/c/766738ecf2b819e54d38763c8d1c8ae6cff14b39"},{"url":"https://git.kernel.org/stable/c/9ba62966461a8e3cc593b62c56ec62eb2d80436d"},{"url":"https://git.kernel.org/stable/c/62fc8eb1b1481051f7bab4aa93d79809053dd09f"}],"title":"USB: legousbtower: fix use-after-free on disconnect race","x_generator":{"engine":"bippy-1.2.0"}}}}