{"id":"CVE-2026-93200","title":"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","summary":"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…","severity":"high","vendor":"Linux","product":"Linux","affected":["Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 < 23a1c4288a60e253a05a882bd8928ed61beb4a48","Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 < 4f3145db05fede36b35f8249b8acde5bd5d54864","Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 < 50034d8d0f797c3a7a599f750a7d3e792e80dea5","Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 < feb0ed76601f3c2f91f08688c5a7d8b9d382f720","Linux 5.0"],"published":"2026-09-17","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:46.447","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93200","references":[{"url":"https://git.kernel.org/stable/c/23a1c4288a60e253a05a882bd8928ed61beb4a48","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93200.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93200"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536714"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93200"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93200"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93200.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-93200"},{"url":"https://git.kernel.org/stable/c/027679d613ea73b8a00831369ec34eea804ce1bd"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00157,"epssPercentile":0.04781,"ingestedAt":"2026-09-17T16:21:47.721Z","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-825","CWE-416"],"slug":"CVE-2026-93200","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93200.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220115,"id":"CVE-2026-93200","ts":1791978560724,"field":"cvss","old":null,"new":"7"},{"seq":220114,"id":"CVE-2026-93200","ts":1791978560724,"field":"severity","old":"none","new":"high"}]}