PT-2026-30132 · Linux · Linux Kernel

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-23437

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 The Linux kernel contained a flaw where late read accesses to the network device hierarchy were not properly protected. A missing liveness check during the conversion from a reference to a locked network device could lead to issues. The issue affects read operations under RCU. The vulnerability concerns the handling of network device references during Netlink operations.

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

Related Identifiers

CVE-2026-23437

Affected Products

Linux Kernel

References · 11

• https://git.kernel.org/stable/c/348758ba74e6a348299965b16a97cfb817545cc0 · Patch
• https://git.kernel.org/stable/c/581eee0890a8bde44f1fb78ad3e70502a897d583 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23437 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23437 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23437 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-23437 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23437 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23437 · Security Note
• https://git.kernel.org/stable/c/0f9ea7141f365b4f27226898e62220fb98ef8dc6 · Patch
• https://git.kernel.org/linus/0f9ea7141f365b4f27226898e62220fb98ef8dc6 · Note
• https://twitter.com/CVEnew/status/2040111895500517509 · Twitter Post