High7.8Red Hat Linux

High [CVE-2026-43284] "Dirty Frag" ESP XFRM variant is a new universal Local Privilege Escalation (LPE) vulnerability in the Linux kernel

This high-severity Red Hat Linux advisory covers CVE-2026-43284 affecting NVIDIA for RHEL 10, Red Hat OpenShift Container Platform 4.12, Red Hat OpenShift Container Platform 4.13.

CVE-2026-43284 Published May 7, 2026

CVE-2026-43284

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

"Dirty Frag" ESP XFRM variant is a new universal Local Privilege Escalation (LPE) vulnerability in the Linux kernel. Red Hat rates this important (CVSS 7.8).

Weakness: CWE-123. Affected package(s): rhcos, kernel, kernel-rt, kpatch-patch.

Resolved in Red Hat advisory RHSA-2026:26542 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: NVIDIA for RHEL 10; Red Hat OpenShift Container Platform 4.12; Red Hat OpenShift Container Platform 4.13; Red Hat OpenShift Container Platform 4.14; and 63 more.

Affected versions

rhcos-412.86.202605111404-0
rhcos-412.86.202605271418-0
rhcos-416.94.202605101426-0
kernel-0:4.18.0-372.192.1.el8_6
kernel-0:5.14.0-687.10.1.el9_8
kernel-rt-0:5.14.0-70.179.1.rt21.251.el9_0
kernel-0:5.14.0-611.55.1.el9_7
kernel-0:4.18.0-477.140.1.el8_8
kernel-0:6.12.0-55.73.1.el10_0
rhcos-414.92.202605111427-0
kernel-0:6.12.0-211.7.3.el10_2
kernel-0:6.12.0-211.7.el10nv

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

Fixed versions

RHSA-2026:26542

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-2026:26542 (`sudo dnf update` / `yum update`).

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

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