PT-2026-38990 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-26 · CVE-2026-43339

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 A Use-after-Free (UaF) issue exists in the Linux kernel within the addrconf permanent addr() function. This occurs because a warning message regarding an exceptional condition is delivered too late, resulting in an attempt to access the ipv6 structure after it may have been deleted.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-43339

Affected Products

Linux Kernel

References · 19

• https://cve.org/CVERecord?id=CVE-2026-43339 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43339 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43339 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43339 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43339 · Vendor Advisory
• https://git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a · Patch
• https://git.kernel.org/stable/c/25357b670afb5b517096da783abaa5cc4bf8359e · Patch
• https://git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e · Patch
• https://git.kernel.org/stable/c/3cd4efb5df72843dfac892d0b3c7a4a8bd926b65 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43339 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-43339 · Vendor Advisory
• https://git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43339 · Vendor Advisory
• https://git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8 · Patch
• https://git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1 · Patch