{"api_version":"1","generated_at":"2026-09-18T03:29:25+00:00","cve":"CVE-2026-93200","urls":{"html":"https://cve.report/CVE-2026-93200","api":"https://cve.report/api/cve/CVE-2026-93200.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93200","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93200"},"summary":{"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:18:16","updated_at":"2026-09-17 17:18:16"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5","name":"https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720","name":"https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864","name":"https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93200","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93200","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 4f3145db05fede36b35f8249b8acde5bd5d54864 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 50034d8d0f797c3a7a599f750a7d3e792e80dea5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 feb0ed76601f3c2f91f08688c5a7d8b9d382f720 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/i3c/master.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4f3145db05fede36b35f8249b8acde5bd5d54864","status":"affected","version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","versionType":"git"},{"lessThan":"50034d8d0f797c3a7a599f750a7d3e792e80dea5","status":"affected","version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","versionType":"git"},{"lessThan":"feb0ed76601f3c2f91f08688c5a7d8b9d382f720","status":"affected","version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/i3c/master.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.0"},{"lessThan":"5.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:12:21.751Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864"},{"url":"https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5"},{"url":"https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720"}],"title":"i3c: master: Fix use-after-free of master->this","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93200","datePublished":"2026-09-17T16:12:21.751Z","dateReserved":"2026-09-17T16:02:15.092Z","dateUpdated":"2026-09-17T16:12:21.751Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:18:16","lastModifiedDate":"2026-09-17 17:18:16","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93200","Ordinal":"1","Title":"i3c: master: Fix use-after-free of master->this","CVE":"CVE-2026-93200","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93200","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"i3c: master: Fix use-after-free of master->this"}]}}}