CVE-2021-46917: linux kernel Resource Exposure — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-668 CWE-668

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.8.0 — 5.10.32
linux	linux_kernel	5.11.0 — 5.11.16

References

Advisories & Patches

https://git.kernel.org/stable/c/e5eb9757fe4c2392e069246ae78badc573af1833 https://git.kernel.org/stable/c/ea9aadc06a9f10ad20a90edc0a484f1147d88a7a https://git.kernel.org/stable/c/f7dc8f5619165e1fa3383d0c2519f502d9e2a1a9 https://git.kernel.org/stable/c/e5eb9757fe4c2392e069246ae78badc573af1833 https://git.kernel.org/stable/c/ea9aadc06a9f10ad20a90edc0a484f1147d88a7a https://git.kernel.org/stable/c/f7dc8f5619165e1fa3383d0c2519f502d9e2a1a9

Frequently Asked Questions

What is CVE-2021-46917? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-46917? +

CVE-2021-46917 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-2021-46917? +

CVE-2021-46917 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-2021-46917? +

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.

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