PT-2026-37424 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43114

Positive Technologies (AI Summary)

CVSS v3.1

9.4

Critical

Base vector

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

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

Description A flaw exists in the netfilter component, specifically within the nft set pipapo avx2 function. When AVX2 matching functions are used, the system may incorrectly return a non-matching entry upon expiry. This occurs because of an early return in the AVX2 match functions during the processing of the last field; the system fails to consume the entire input size, which can lead to incorrect masking. Consequently, the skip-step may identify a matching element based only on the first field, returning an entry even if the last field differs.

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

Related Identifiers

CVE-2026-43114

Affected Products

Linux Kernel

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-43114 · Security Note
• https://t.me/CVEtracker/52837 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2051992508872216715 · Twitter Post
• https://git.kernel.org/stable/c/0abbc43f71d99baadeeba6fa3fe1c80b676f57ed · Note
• https://git.kernel.org/stable/c/fa4f1f52528c73989d820f32bfca06bec5afeece · Note
• https://git.kernel.org/stable/c/3d53f9aafd469ae1ea27051e00f5b96ca1b55d52 · Note
• https://git.kernel.org/stable/c/d3c0037ffe1273fa1961e779ff6906234d6cf53c · Note
• https://git.kernel.org/stable/c/07de44424bb7f17ef9357e8535df96d9e97c40cb · Note