CVE-2022-50482: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Clean up si_domain in the init_dmars() error path A splat from kmem_cache_destroy() was seen with a kernel prior to commit ee2653bbe89d ("iommu/vt-d: Remove domain and devinfo mempool") when there was a failure in init_dmars(), because the iommu_domain cache still had objects. While the mempool code is now gone, there still is a leak of the si_domain memory if init_dmars() fails. So clean up si_domain in the init_dmars() error path.

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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:N/I:N/A:H

Weakness Type (CWE)

CWE-908 CWE-908

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.2 — 4.14.298
linux	linux_kernel	4.15 — 4.19.264
linux	linux_kernel	4.20 — 5.4.221
linux	linux_kernel	5.5 — 5.10.152
linux	linux_kernel	5.11 — 5.15.76
linux	linux_kernel	5.16 — 6.0.6
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0365d6af75f9f2696e94a0fef24a2c8464c037c8 https://git.kernel.org/stable/c/5cecfe151874b835331efe086bbdcaeaf64f6b90 https://git.kernel.org/stable/c/620bf9f981365c18cc2766c53d92bf8131c63f32 https://git.kernel.org/stable/c/724483b585a1b1e063d42ac5aa835707ff2ec165 https://git.kernel.org/stable/c/749bea542b67513e99240dc58bbfc099e842d508 https://git.kernel.org/stable/c/c4ad3ae4c6be9d8b0701761c839771116bca6ea3 https://git.kernel.org/stable/c/d74196bb278b8f8af88e16bd595997dfa3d6fdb0

Frequently Asked Questions

What is CVE-2022-50482? +

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Clean up si_domain in the init_dmars() error path A splat from kmem_cache_destroy() was seen with a kernel prior to commit ee2653bbe89d ("iommu/vt-d: Remove domain and devinfo mempool") when there was a failure in init_dmars(), because the iommu_domain cache still had objects. While the mempool code is now gone, there still is a leak of the si_domain memory if init_dmars() fails. So clean up si_domain in the init_dmars() error path. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50482? +

CVE-2022-50482 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-2022-50482? +

CVE-2022-50482 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-2022-50482? +

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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