rust_binder: reschedule node refcount update on thread exit

Summary

CVECVE-2026-99075
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 13:17:31 UTC
Updated2026-10-23 13:17:31 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: rust_binder: reschedule node refcount update on thread exit When a thread exits via BINDER_THREAD_EXIT, its pending work items are cancelled. If a thread exits while holding a pending node refcount increment (e.g. pushed as deferred work to that thread), the refcount increment was previously dropped because Node::cancel() and NodeWrapper::cancel() were no-ops. Dropping the refcount update leaves the node's delivery state and count state desynchronized, and userspace will not receive the notification, which can cause the node to never be freed from the process's nodes tree when all external references are dropped. Fix this by implementing DeliverToRead::cancel() for Node and NodeWrapper to move the pending refcount update to the process's work queue on thread exit so another thread can deliver it to userspace.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected eafedbc7c050c44744fbdf80bdf3315e860b7513 71cbad138969edecef01b28dff87d91b56db538d git Not specified
CNA Linux Linux affected eafedbc7c050c44744fbdf80bdf3315e860b7513 fb0f8dfc5a030ed3d60a1d03acdc99c90ee99fc1 git Not specified
CNA Linux Linux affected eafedbc7c050c44744fbdf80bdf3315e860b7513 2a74ccd1bcc170e66525f34e9de8652b57e2cf3d git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.11 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fb0f8dfc5a030ed3d60a1d03acdc99c90ee99fc1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2a74ccd1bcc170e66525f34e9de8652b57e2cf3d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/71cbad138969edecef01b28dff87d91b56db538d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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