High8.8Vendor: CriticalRed Hat Linux

High [CVE-2026-43037] clear skb2->cb[] in ip4ip6_err()

This high-severity Red Hat Linux advisory covers CVE-2026-43037 affecting NVIDIA for RHEL 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION.

CVE-2026-43037 Published May 1, 2026

CVE-2026-43037

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

clear skb2->cb[] in ip4ip6_err(). Red Hat rates this critical (CVSS 8.8).

Weakness: CWE-843. Affected package(s): kernel, rhcos, kernel-rt, kpatch-patch.

Resolved in Red Hat advisory RHSA-2026:28741 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: NVIDIA for RHEL 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION; Red Hat Enterprise Linux 7 Extended Lifecycle Support; and 20 more.

Affected versions

kernel-0:4.18.0-305.194.1.el8_4
kernel-0:4.18.0-477.145.1.el8_8
rhcos-4.20.9.6.202606101223-0
kernel-0:5.14.0-427.129.1.el9_4
kernel-0:2.6.32-754.61.1.el6
rhcos-414.92.202606231112-0
kernel-rt-0:5.14.0-284.174.1.rt14.459.el9_2
kernel-0:5.14.0-284.174.1.el9_2
kernel-0:5.14.0-687.15.1.el9_8
rhcos-418.94.202606051320-0
kernel-0:6.12.0-55.77.1.el10_0
kernel-0:6.12.0-212.10.el10nv

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:28741

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:28741 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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