High7.4Vendor: MediumRed Hat Linux

High [CVE-2026-23066] Linux kernel: Denial of Service via unsafe requeue in rxrpc_recvmsg

This high-severity Red Hat Linux advisory covers CVE-2026-23066 affecting Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 1, kernel-rt.

CVE-2026-23066 Published Feb 4, 2026

CVE-2026-23066

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Linux kernel: Denial of Service via unsafe requeue in rxrpc_recvmsg. Red Hat rates this moderate (CVSS 7.4).

Weakness: CWE-416. Affected package(s): kernel, kernel-rt.

Resolved in Red Hat advisory RHSA-2026:9112 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.

Affected versions

kernel-0:5.14.0-570.108.1.el9_6
kernel-0:6.12.0-55.69.1.el10_0
kernel-0:5.14.0-427.121.1.el9_4
kernel-0:5.14.0-284.166.1.el9_2
kernel-rt-0:5.14.0-284.166.1.rt14.451.el9_2

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

Fixed versions

RHSA-2026:9112

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-2026:9112 (`sudo dnf update` / `yum update`).

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

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