CVE-2023-53077: linux kernel Memory Corruption — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes [WHY] When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dml_log2 returns an unexpected negative value: shift exponent 4294966273 is too large for 32-bit type 'int' [HOW] In the case PTEBufferSizeInRequests is zero, skip the dml_log2() and assign the result directly.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.9 — 5.10.176
linux	linux_kernel	5.11 — 5.15.104
linux	linux_kernel	5.16 — 6.1.21
linux	linux_kernel	6.2 — 6.2.8

References

Advisories & Patches

https://git.kernel.org/stable/c/031f196d1b1b6d5dfcb0533b431e3ab1750e6189 https://git.kernel.org/stable/c/7257070be70e19a9138f39009c1a26c83a8a7cfa https://git.kernel.org/stable/c/a16394b5d661afec9a264fecac3abd87aea439ea https://git.kernel.org/stable/c/bec1bea2fa974e63f6059c33edde669c7894d0bc https://git.kernel.org/stable/c/e12b95680821b9880cd9992c0f3555389363604f

Frequently Asked Questions

What is CVE-2023-53077? +

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes [WHY] When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dml_log2 returns an unexpected negative value: shift exponent 4294966273 is too large for 32-bit type 'int' [HOW] In the case PTEBufferSizeInRequests is zero, skip the dml_log2() and assign the result directly. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53077? +

CVE-2023-53077 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-53077? +

CVE-2023-53077 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-2023-53077? +

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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