{"id":"CVE-2026-93086","summary":"firmware: arm_scmi: Avoid IDR updates while cleaning channels","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Avoid IDR updates while cleaning channels\n\nscmi_cleanup_channels() walks the TX/RX channel IDRs with\nidr_for_each() to free transport resources and destroy the dedicated\ntransport devices before calling idr_destroy().\n\nThe destroy callback removed each entry from the same IDR being walked.\nThat is not needed for this cleanup path, and it is unsafe because\nidr_for_each() has not advanced its radix-tree iterator while the\ncallback is running. Removing the current entry from the callback can\ninvalidate the iterator state. The callback also cannot be protected by\nrcu_read_lock(), because scmi_device_destroy() may sleep.\n\nLeave IDR teardown to the following idr_destroy() call and keep the\ncallback limited to device destruction.","modified":"2026-09-19T03:47:27.882146231Z","published":"2026-09-17T16:11:05.025Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93086.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088"},{"type":"WEB","url":"https://git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93086.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93086"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1"},{"fixed":"aed24a3c63920539e9de7fbfe7929a2e7c888cd2"},{"fixed":"431c6b872ba7fedcc5a3afb0ec3517db4d95d088"},{"fixed":"54e5a4f7d83db4552d963d0785be32d9df680dcd"},{"fixed":"bab26acebe55e8ad3ab545abda72faa7ca28c477"},{"fixed":"c38b1e19485aaa820e52cfe162525a8af67563da"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93086.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93086.json"}}],"schema_version":"1.9.0"}