PT-2026-37403 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43093

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description Insufficient headroom validation in the xdp umem reg() function could result in inadequate space for receiving minimum-sized ethernet frames. This issue may lead to the corruption of skb shared info stored at the end of the XSK frame when multi-buffer settings are utilized.

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

Related Identifiers

CVE-2026-43093

Affected Products

Linux Kernel

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-43093 · Security Note
• https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1 · Note
• https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39 · Note
• https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f · Note
• https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931 · Note
• https://twitter.com/VulmonFeeds/status/2052048824516989010 · Twitter Post
• https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12 · Note