CVE-2026-31443 dmaengine: idxd: Fix crash when the event log is disabled

What is CVE-2026-31443?

CVE-2026-31443 is a medium-severity vulnerability in Linux kernel, published on 22 Apr 2026. 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:

dmaengine: idxd: Fix crash when the event log is disabled

If reporting errors to the event log is not supported by the hardware, and an error that causes Function Level Reset (FLR) is received, the driver will try to restore the event log even if it was not allocated.

Also, only try to free the event log if it was properly allocated.

Which versions are affected by CVE-2026-31443?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-31443?

Apply the vendor's patch.

Is CVE-2026-31443 being exploited?

There is no known exploitation of CVE-2026-31443 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-2026-31443, DEBIAN-CVE-2026-31443, GHSA-9f4r-8qhp-55cq, UBUNTU-CVE-2026-31443.