PT-2026-39061 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43400

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the drm/amdgpu component where the amdgpu userq signal ioctl function lacks proper upper bound checks on user inputs. Providing excessively large input values can lead to an Out-Of-Memory (OOM) condition, which is a state where the system exhausts its available memory, potentially resulting in a Denial of Service (DoS).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-43400

Affected Products

Linux Kernel

References · 13

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43400 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43400 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43400 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43400 · Vendor Advisory
• https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43400 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43400 · Vendor Advisory
• https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f · Patch
• https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962 · Patch
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://git.kernel.org/linus/ea78f8c68f4f6211c557df49174c54d167821962 · Note
• https://twitter.com/CVEnew/status/2052767681275941197 · Twitter Post
• https://twitter.com/windowsforum/status/2053771187923136866 · Twitter Post