{"api_version":"1","generated_at":"2026-09-17T23:31:11+00:00","cve":"CVE-2026-93086","urls":{"html":"https://cve.report/CVE-2026-93086","api":"https://cve.report/api/cve/CVE-2026-93086.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93086","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93086"},"summary":{"title":"firmware: arm_scmi: Avoid IDR updates while cleaning channels","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:18:02","updated_at":"2026-09-17 17:18:02"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088","name":"https://git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd","name":"https://git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2","name":"https://git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da","name":"https://git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477","name":"https://git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93086","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93086","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 aed24a3c63920539e9de7fbfe7929a2e7c888cd2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 431c6b872ba7fedcc5a3afb0ec3517db4d95d088 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 54e5a4f7d83db4552d963d0785be32d9df680dcd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 bab26acebe55e8ad3ab545abda72faa7ca28c477 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 c38b1e19485aaa820e52cfe162525a8af67563da git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* 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/firmware/arm_scmi/driver.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"aed24a3c63920539e9de7fbfe7929a2e7c888cd2","status":"affected","version":"05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1","versionType":"git"},{"lessThan":"431c6b872ba7fedcc5a3afb0ec3517db4d95d088","status":"affected","version":"05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1","versionType":"git"},{"lessThan":"54e5a4f7d83db4552d963d0785be32d9df680dcd","status":"affected","version":"05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1","versionType":"git"},{"lessThan":"bab26acebe55e8ad3ab545abda72faa7ca28c477","status":"affected","version":"05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1","versionType":"git"},{"lessThan":"c38b1e19485aaa820e52cfe162525a8af67563da","status":"affected","version":"05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/firmware/arm_scmi/driver.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","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":"6.6.157","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:11:05.025Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2"},{"url":"https://git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088"},{"url":"https://git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd"},{"url":"https://git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477"},{"url":"https://git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da"}],"title":"firmware: arm_scmi: Avoid IDR updates while cleaning channels","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93086","datePublished":"2026-09-17T16:11:05.025Z","dateReserved":"2026-09-17T15:57:05.662Z","dateUpdated":"2026-09-17T16:11:05.025Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:18:02","lastModifiedDate":"2026-09-17 17:18:02","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93086","Ordinal":"1","Title":"firmware: arm_scmi: Avoid IDR updates while cleaning channels","CVE":"CVE-2026-93086","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93086","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"firmware: arm_scmi: Avoid IDR updates while cleaning channels"}]}}}