Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: binder: fix leaked fd fixups on TF_UPDATE_TXN supersede When a TF_UPDATE_TXN transaction supersedes a pending async transaction in a frozen process, the outdated transaction is freed with kfree() directly. This skips binder_free_txn_fixups(), leaking all binder_txn_fd_fixup entries and their fget()'d struct file references. The leaked file refcounts never reach zero, so the struct file objects are permanently pinned in memory. They survive process exit and accumulate across invocations until file-max exhaustion. Every other transaction cleanup path (binder_free_transaction(), binder_transaction() error paths, binder_release_work()) correctly calls binder_free_txn_fixups(). Add the missing call before kfree() in the t_outdated cleanup block.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund18 Oct 2026WID-SEC-2026-4019

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-98866CVE-2026-98624CVE-2026-98745+326 more CVEs

[ References ]References

• git.kernel.org/stable/c/1299cb3fb061598496086fc87ff291057831148e
• git.kernel.org/stable/c/6673f4f21e2fddfed0abe1eb9045cc958e6db130
• git.kernel.org/stable/c/7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55
• git.kernel.org/stable/c/a7329ea53d04f0c6135d02905810cd6f42acdf45
• git.kernel.org/stable/c/c4c02084d6687d5cd5edccaf52cc45e5160f1184