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

What is CVE-2024-43865?

CVE-2024-43865 is a medium-severity denial of service vulnerability in Linux kernel, published on 20 Aug 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2024-43865?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-43865?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-43865 being exploited?

There is no known exploitation of CVE-2024-43865 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-43865, DEBIAN-CVE-2024-43865, GHSA-453r-h2v5-6vmq, UBUNTU-CVE-2024-43865.