What’s Vulnerable › Vulnerabilities

CVE-2026-80552: s390/vfio_ccw: Ensure index for read/write regions are within range

• 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: Ensure index for read/write regions are within range The introduction of the capability chain rightly clamped the region indexes to the range of the capabilities itself, but neglected to do so for the existing read/write regions which should also be enforced.

Affected products

• Linux kernel: 5.2 — 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/3acbedf5c0b8e0971f0de423c05cc02bbf6ddb99
• https://git.kernel.org/stable/c/649badf3a2fd8929e40198603a2cb21b74c21700
• https://git.kernel.org/stable/c/79ea5e0c4c8a9842ae85f45062d947b3297dfc07
• https://git.kernel.org/stable/c/988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf
• https://git.kernel.org/stable/c/9f5f9a78fedc45bc29d6a0a64e3a3472361afae5
• https://git.kernel.org/stable/c/d3b1e38404b22df5a1f93019f2bb656feaad5ae3
• https://git.kernel.org/stable/c/d597fa1273802941c7801202135976fecc29672b

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