CVE-2021-46920: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read.

Is your site exposed to CVE-2021-46920?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.6.0 — 5.10.32
linux	linux_kernel	5.11.0 — 5.11.16

References

Advisories & Patches

https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8 https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8 https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f

Frequently Asked Questions

What is CVE-2021-46920? +

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-46920? +

CVE-2021-46920 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2021-46920? +

CVE-2021-46920 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-46920? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-9588 10.0

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Iron Mountain Archiving Services Inc. …

CVE-2025-57870 10.0

A SQL Injection vulnerability exists in Esri ArcGIS Server versions 11.3, 11.4 and 11.5 on Windows, Linux and Kubernetes. This …

CVE-2026-48286 10.0

Adobe Campaign Classic (ACC) versions 7.4.3 build 9396 and earlier are affected by an Incorrect Authorization vulnerability that could result …

CVE-2026-13782 10.0

Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer …

CVE-2026-48449 10.0

Adobe Campaign Classic (ACC) is affected by an Incorrect Authorization vulnerability that could result in arbitrary code execution in the …

CVE-2026-48303 10.0

Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by an Incorrect Authorization vulnerability that could result …

CVE-2021-46920