CVE-2021-46917 dmaengine: idxd: fix wq cleanup of WQCFG registers

What is CVE-2021-46917?

CVE-2021-46917 is a medium-severity vulnerability in Linux kernel, published on 27 Feb 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:

dmaengine: idxd: fix wq cleanup of WQCFG registers

A pre-release silicon erratum workaround where wq reset does not clear WQCFG registers was leaked into upstream code. Use wq reset command instead of blasting the MMIO region. This also address an issue where we clobber registers in future devices.

Weakness: CWE-668

Which versions are affected by CVE-2021-46917?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-46917?

Apply the vendor's patch.

Is CVE-2021-46917 being exploited?

There is no known exploitation of CVE-2021-46917 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 DEBIAN-CVE-2021-46917, GHSA-79cc-r4hf-5pv4, UBUNTU-CVE-2021-46917.