CVE-2026-98227

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.

Is your site exposed to CVE-2026-98227?

Run a free security scan — no signup, results in seconds.

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

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

Frequently Asked Questions

What is CVE-2026-98227? +

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.

How do I check if I'm vulnerable to CVE-2026-98227? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.