What’s Vulnerable › Vulnerabilities

CVE-2026-53117: s390/cio: use generic driver_override infrastructure

• Severity: high (CVSS 7.8 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: 2026-06-24 · updated 2026-07-23
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: s390/cio: use generic driver_override infrastructure When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF. Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally. Note that calling match() from __driver_attach() without the device lock held is intentional. [1]

Affected products

• Linux kernel: from 5.3 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10 — fixed in 6.12.91, 6.18.33, 6.6.141, 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 6.12.91, 6.18.33, 6.6.141, 7.0.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/106d594711e97762788046c5bbb94f580abc4bf4
• https://git.kernel.org/stable/c/2081957d8c323ffb58a10bc64837717ac5a042a1
• https://git.kernel.org/stable/c/ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4
• https://git.kernel.org/stable/c/b660ba045b2b22cf3b4be72773de00cb48f47be5
• https://git.kernel.org/stable/c/c4295487124f461405e1ef64dfa8c4ab0cb7ebcf

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