CVE-2022-49055: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Check for potential null return of kmalloc_array() As the kmalloc_array() may return null, the 'event_waiters[i].wait' would lead to null-pointer dereference. Therefore, it is better to check the return value of kmalloc_array() to avoid this confusion.

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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-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.9.311
linux	linux_kernel	4.10 — 4.14.276
linux	linux_kernel	4.15 — 4.19.239
linux	linux_kernel	4.20 — 5.4.190
linux	linux_kernel	5.5 — 5.10.112
linux	linux_kernel	5.11 — 5.15.35
linux	linux_kernel	5.16 — 5.17.4
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0a692c625e373fef692ffbc7fc41f8a025f01cb7 https://git.kernel.org/stable/c/1d7a5aae884ca727d41c7ed15d4c82fdb67c040c https://git.kernel.org/stable/c/32cf90a521dcc0f136db7ee5ba32bfe5f79e460e https://git.kernel.org/stable/c/40bf32dbfef866c83a3e74800b81d79e52b6d20b https://git.kernel.org/stable/c/94869bb0de69a812f70231b0eb480bb2f7ae73a6 https://git.kernel.org/stable/c/c7a268b33882d5feaafd29c1734456f41ba41396 https://git.kernel.org/stable/c/ebbb7bb9e80305820dc2328a371c1b35679f2667 https://git.kernel.org/stable/c/f2658d5966bcee8c3eb487875f459756d4f7cdfc

Frequently Asked Questions

What is CVE-2022-49055? +

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Check for potential null return of kmalloc_array() As the kmalloc_array() may return null, the 'event_waiters[i].wait' would lead to null-pointer dereference. Therefore, it is better to check the return value of kmalloc_array() to avoid this confusion. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49055? +

CVE-2022-49055 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-2022-49055? +

CVE-2022-49055 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-2022-49055? +

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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CVE-2022-49055