PT-2026-39111 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43450

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description An out-of-bounds read exists in the nfnl cthelper dump table() function within the netfilter nfnetlink cthelper component. The issue occurs when a helper saved in cb->args[1] is deleted between dump rounds, causing the goto restart block to jump back into the loop body while bypassing the bounds check. This results in an 8-byte out-of-bounds read on nf ct helper hash[nf ct helper hsize].

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-43450

Affected Products

Linux Kernel

References · 19

• https://git.kernel.org/stable/c/3cc328ffc32ddb389cba7b78b6aa95d995c2876e · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43450 · Vendor Advisory
• https://git.kernel.org/stable/c/894c5780ddadd5fde0e16f66587918e6be1504c4 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43450 · Vendor Advisory
• https://git.kernel.org/stable/c/92441f6d9405a0c18d03f278b395e782f79a4a30 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43450 · Vendor Advisory
• https://git.kernel.org/stable/c/05018cd9370f77bb18fbf6e15ff33c7a06f10b3c · Patch
• https://cve.org/CVERecord?id=CVE-2026-43450 · Security Note
• https://git.kernel.org/stable/c/0605e1985a95d4334a67869aee45a47e82301abf · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43450 · Security Note
• https://git.kernel.org/stable/c/4a1f6ee69267a5f524102c028981410eeacfa3da · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43450 · Vendor Advisory
• https://git.kernel.org/stable/c/6dcee8496d53165b2d8a5909b3050b62ae71fe89 · Patch
• https://git.kernel.org/stable/c/61b3a1f8621df1a5928118313f133996f6a786db · Patch
• https://ubuntu.com/security/CVE-2026-43450 · Vendor Advisory