{"id":"CVE-2026-64343","state":"PUBLISHED","title":"USB: ldusb: fix use-after-free on disconnect race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: ldusb: 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\")","publishedAt":"2026-07-25T08:50:05.828Z","updatedAt":"2026-08-17T04:53:47.172Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"fc55923a972e715f9a27187b47d4920709e23d85","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"af59829e67e11ba2511a9f8e4b9111afc7d1f550","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"d8f69404e1d671326f86d378b9f5bfbd56490e9d","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"a3e794136ab5e3ad1e7019175a4b837aec86db4b","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"19bdfc7b3c179331eafa423d87e1336f43bbfeb8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/ldusb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.26","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/ldusb.c"]}],"references":["https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85","https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69","https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550","https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4","https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d","https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915","https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b","https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64343.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64343","state":"PUBLISHED","datePublished":"2026-07-25T08:50:05.828Z","dateUpdated":"2026-08-17T04:53:47.172Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.781Z"},"containers":{"cna":{"title":"USB: ldusb: fix use-after-free on disconnect race","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: ldusb: 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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"fc55923a972e715f9a27187b47d4920709e23d85","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"af59829e67e11ba2511a9f8e4b9111afc7d1f550","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"d8f69404e1d671326f86d378b9f5bfbd56490e9d","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"a3e794136ab5e3ad1e7019175a4b837aec86db4b","versionType":"git"},{"version":"ce0d7d3f575fc1ba6a89c3c651e710355590daff","status":"affected","lessThan":"19bdfc7b3c179331eafa423d87e1336f43bbfeb8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/ldusb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.26","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/ldusb.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85"},{"url":"https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69"},{"url":"https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550"},{"url":"https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4"},{"url":"https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d"},{"url":"https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915"},{"url":"https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b"},{"url":"https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:53:47.172Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}