{"id":"CVE-2026-93200","state":"PUBLISHED","title":"i3c: master: Fix use-after-free of master->this","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix use-after-free of master->this\n\nsysfs attribute callbacks for the master controller device dereference\nmaster->this.  However, master->this is freed in\ni3c_master_detach_free_devs() before the master device itself is\nreleased.\n\nAs a result, sysfs accesses can dereference a freed master->this\npointer, leading to a use-after-free.\n\nKeep master->this alive until i3c_masterdev_release(), which is called\nafter the master device and its sysfs state are being torn down. Do not\nfree master->this as part of the normal device detach path.\n\nOn the error path in i3c_master_set_info(), reset master->this and\nbus.cur_master to NULL before freeing the allocated device.","publishedAt":"2026-09-17T16:12:21.751Z","updatedAt":"2026-10-30T12:36:22.707Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"a9b9cae0bd887ef0d438887f20b0a417491e45f0","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"94af669037d129914828a851d8b2a79b4537b73f","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"e766605a0490723df7b61e6abd0c392889732dd7","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"027679d613ea73b8a00831369ec34eea804ce1bd","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"23a1c4288a60e253a05a882bd8928ed61beb4a48","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"4f3145db05fede36b35f8249b8acde5bd5d54864","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"50034d8d0f797c3a7a599f750a7d3e792e80dea5","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"feb0ed76601f3c2f91f08688c5a7d8b9d382f720","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i3c/master.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i3c/master.c"]}],"references":["https://git.kernel.org/stable/c/a9b9cae0bd887ef0d438887f20b0a417491e45f0","https://git.kernel.org/stable/c/94af669037d129914828a851d8b2a79b4537b73f","https://git.kernel.org/stable/c/e766605a0490723df7b61e6abd0c392889732dd7","https://git.kernel.org/stable/c/027679d613ea73b8a00831369ec34eea804ce1bd","https://git.kernel.org/stable/c/23a1c4288a60e253a05a882bd8928ed61beb4a48","https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864","https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5","https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720"],"weaknesses":[],"ingestedAt":"2026-10-30T12:56:04.490Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93200.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93200","state":"PUBLISHED","datePublished":"2026-09-17T16:12:21.751Z","dateUpdated":"2026-10-30T12:36:22.707Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-17T16:02:15.092Z"},"containers":{"cna":{"title":"i3c: master: Fix use-after-free of master->this","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix use-after-free of master->this\n\nsysfs attribute callbacks for the master controller device dereference\nmaster->this.  However, master->this is freed in\ni3c_master_detach_free_devs() before the master device itself is\nreleased.\n\nAs a result, sysfs accesses can dereference a freed master->this\npointer, leading to a use-after-free.\n\nKeep master->this alive until i3c_masterdev_release(), which is called\nafter the master device and its sysfs state are being torn down. Do not\nfree master->this as part of the normal device detach path.\n\nOn the error path in i3c_master_set_info(), reset master->this and\nbus.cur_master to NULL before freeing the allocated device."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"a9b9cae0bd887ef0d438887f20b0a417491e45f0","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"94af669037d129914828a851d8b2a79b4537b73f","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"e766605a0490723df7b61e6abd0c392889732dd7","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"027679d613ea73b8a00831369ec34eea804ce1bd","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"23a1c4288a60e253a05a882bd8928ed61beb4a48","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"4f3145db05fede36b35f8249b8acde5bd5d54864","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"50034d8d0f797c3a7a599f750a7d3e792e80dea5","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","status":"affected","lessThan":"feb0ed76601f3c2f91f08688c5a7d8b9d382f720","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i3c/master.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i3c/master.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a9b9cae0bd887ef0d438887f20b0a417491e45f0"},{"url":"https://git.kernel.org/stable/c/94af669037d129914828a851d8b2a79b4537b73f"},{"url":"https://git.kernel.org/stable/c/e766605a0490723df7b61e6abd0c392889732dd7"},{"url":"https://git.kernel.org/stable/c/027679d613ea73b8a00831369ec34eea804ce1bd"},{"url":"https://git.kernel.org/stable/c/23a1c4288a60e253a05a882bd8928ed61beb4a48"},{"url":"https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864"},{"url":"https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5"},{"url":"https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:36:22.707Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}