CVE-2026-99075 is a vulnerability in Linux Kernel
Published on October 23, 2026
rust_binder: reschedule node refcount update on thread exit
In 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.
Products Associated with CVE-2026-99075
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Affected Versions
Linux:- Version eafedbc7c050c44744fbdf80bdf3315e860b7513 and below 71cbad138969edecef01b28dff87d91b56db538d is affected.
- Version eafedbc7c050c44744fbdf80bdf3315e860b7513 and below fb0f8dfc5a030ed3d60a1d03acdc99c90ee99fc1 is affected.
- Version eafedbc7c050c44744fbdf80bdf3315e860b7513 and below 2a74ccd1bcc170e66525f34e9de8652b57e2cf3d is affected.
- Version 6.18 is affected.
- Before 6.18 is unaffected.
- Version 6.18.57, <= 6.18.* is unaffected.
- Version 7.2.11, <= 7.2.* is unaffected.
- Version 7.3, <= * is unaffected.