What’s Vulnerable › Vulnerabilities

CVE-2026-80553: s390/vfio_ccw: Cancel existing workqueues

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Cancel existing workqueues The initialization of the io_work and crw_work workqueues begs the question of whether they should be un-initialized. Add the corresponding cleanup tags in _release_dev to ensure work isn't dispatched after the private struct is free'd.

Affected products

• Linux kernel: 4.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/7492ca2d0c5d59add01e267be9f5a6eeb8076fd7
• https://git.kernel.org/stable/c/77f5e888d2e607a0b3141fb95091ad6ef1cca9a2
• https://git.kernel.org/stable/c/79c60b2c61105368dcc8444eb45847e21734f7c4
• https://git.kernel.org/stable/c/87d569cb35a541b31a184faf982540694d4c9a89
• https://git.kernel.org/stable/c/b7ae0f7993867d009a4b554fc1d6d451c10580a0
• https://git.kernel.org/stable/c/b94b28c1f0fae53b2f2d6180ae6442c9a1558f67
• https://git.kernel.org/stable/c/dc47a98abe6714577a25224534dbd356051097a3
• https://git.kernel.org/stable/c/e868ea8be0bc88c6982f48ecf3259d98afd884ae

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