PT-2026-39115 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43454

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 An issue exists in the netfilter nf tables component where duplicate device registration can occur when handling NETDEV REGISTER notifications. This happens because a device might have already been added by the nft netdev hook alloc() function during hook creation.

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

Related Identifiers

CVE-2026-43454

Affected Products

Linux Kernel

References · 12

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43454 · Vendor Advisory
• https://git.kernel.org/stable/c/2041cdb078041611510fc189410bc70b29f688fb · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43454 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43454 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43454 · Security Note
• https://git.kernel.org/stable/c/b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b · Patch
• https://ubuntu.com/security/CVE-2026-43454 · Vendor Advisory
• https://git.kernel.org/stable/c/6d2a95c6890577cc3eab2b20018e16850d7fb094 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43454 · Security Note
• https://git.kernel.org/linus/b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b · Note
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://twitter.com/CVEnew/status/2052767611449164249 · Twitter Post