CVE-2026-72011: s390/diag: Add missing array_index_nospec() call to memtop_get_page_count()

Severity: unknown
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: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: s390/diag: Add missing array_index_nospec() call to memtop_get_page_count() 'level' is user space controlled and used to read from an array. Add the missing array_index_nospec() call to prevent speculative execution.

Affected products

Linux kernel: 6.14 — 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/83fe36f81200b7a85f8efe0a68a4e58be84d5f64
https://git.kernel.org/stable/c/b7577fe4c47a31ca7c99714c53244a44af03cdfe
https://git.kernel.org/stable/c/c6b4d454865a81ceea1422243aaaedc363b6f713

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