{"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": "2026-07-25T08:50:03.896Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:50:03.896Z"}, "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-rc3", "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-rc3"}]}]}], "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"}}}}

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