CVE-2024-43865: s390/fpu: Re-add exception handling in load_fpu_state()

Severity: medium (CVSS 5.5 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: 2024-08-21 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: s390/fpu: Re-add exception handling in load_fpu_state() With the recent rewrite of the fpu code exception handling for the lfpc instruction within load_fpu_state() was erroneously removed. Add it again to prevent that loading invalid floating point register values cause an unhandled specification exception.

Affected products

Linux kernel: from 6.9 before 6.10.4; 6.11-rc1 — fixed in 6.10.4

How to fix

Upgrade to a fixed version: Linux kernel 6.10.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/4734406c39238cbeafe66f0060084caa3247ff53
https://git.kernel.org/stable/c/494b14138201f07343e5488db6360c828fcc8cf6

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