firmware: arm_scmi: Avoid IDR updates while cleaning channels

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93086
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:02 UTC
Updated2026-09-17 17:18:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Avoid IDR updates while cleaning channels scmi_cleanup_channels() walks the TX/RX channel IDRs with idr_for_each() to free transport resources and destroy the dedicated transport devices before calling idr_destroy(). The destroy callback removed each entry from the same IDR being walked. That is not needed for this cleanup path, and it is unsafe because idr_for_each() has not advanced its radix-tree iterator while the callback is running. Removing the current entry from the callback can invalidate the iterator state. The callback also cannot be protected by rcu_read_lock(), because scmi_device_destroy() may sleep. Leave IDR teardown to the following idr_destroy() call and keep the callback limited to device destruction.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 aed24a3c63920539e9de7fbfe7929a2e7c888cd2 git Not specified
CNA Linux Linux affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 431c6b872ba7fedcc5a3afb0ec3517db4d95d088 git Not specified
CNA Linux Linux affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 54e5a4f7d83db4552d963d0785be32d9df680dcd git Not specified
CNA Linux Linux affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 bab26acebe55e8ad3ab545abda72faa7ca28c477 git Not specified
CNA Linux Linux affected 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 c38b1e19485aaa820e52cfe162525a8af67563da git Not specified
CNA Linux Linux affected 6.3 Not specified
CNA Linux Linux unaffected 6.3 semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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