CVEvulnerability
CVE-2026-98778
- Status
- Received
- Published
- 2026-10-18
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
binder: fix is_failure flag for superseded transaction cleanup
When a TF_UPDATE_TXN transaction supersedes a pending async transaction,
binder_release_entire_buffer() is called with is_failure=false. Since the
superseded transaction was never delivered, binder_apply_fd_fixups() was
never called and no fds were installed in the target process.
With is_failure=false, the BINDER_TYPE_FDA cleanup handler interprets
stale buffer contents as installed fd numbers and passes them to
binder_deferred_fd_close(), closing unrelated file descriptors.
Pass is_failure=true since the transaction was never delivered to the
target, matching the semantics of all other undelivered-transaction
cleanup paths.
References
- https://git.kernel.org/stable/c/1ab671b50714ad8e359cf37eb041d8044319ccdc git.kernel.org
- https://git.kernel.org/stable/c/22c135635fdd9816c0ef140d6de7b2e4fdf73e89 git.kernel.org
- https://git.kernel.org/stable/c/60a9f7323ae7318a7cce0d387c318da24f1e8726 git.kernel.org
- https://git.kernel.org/stable/c/86cdcc87d4ba60aebf94ba3346b3c900c5cd79ff git.kernel.org
- https://git.kernel.org/stable/c/e9b364e46d594c2ec663c9c49f10c1ca541ecc0f git.kernel.org