Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: memstick: ms_block: destroy io_queue workqueue on removal msb_init_disk() creates the per-card ordered workqueue msb->io_queue with alloc_ordered_workqueue(). It is torn down with destroy_workqueue() only on the init error path; msb_remove() never destroys it. msb_stop() merely flushes the queue, and neither msb_data_clear() nor put_disk() free it. As a result every card insert/remove cycle leaks the workqueue and its kworker, exhausting kernel memory over repeated cycles. Destroy the workqueue in msb_remove() after the disk has been removed and the queue drained.

[ 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-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/0ff795163f37109a134b5a421558530f8d091544
• git.kernel.org/stable/c/19c3da6621a253f1f8b937ed91bc22330a930d9c
• git.kernel.org/stable/c/6611f78ec3fd4b33a00bfda20725b254a22979f6
• git.kernel.org/stable/c/90af7fde083e1b22c349c3a8b1626728e44e474c
• git.kernel.org/stable/c/9a2e7cdc0880e735aff0968ee402f2c92a992b9b
• git.kernel.org/stable/c/f222bb8c30cf5699c560b29179ff2bddcac1f950