High7.0Vendor: MediumRed Hat & Ubuntu Linux

Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

CVE-2026-23270 Published Mar 18, 2026

CVE-2026-23270

Affected products & platforms

Red Hat & Ubuntu LinuxUnclassified

Summary

Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation. Red Hat rates this moderate (CVSS 7). Weakness: CWE-416. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:19569 — update the affected packages (`sudo dnf update`).

Affected versions

kernel-0:4.18.0-553.126.1.el8_10
kernel-0:5.14.0-427.127.1.el9_4
kernel-0:6.12.0-211.16.1.el10_2
kernel-rt-0:5.14.0-284.174.1.rt14.459.el9_2
kernel-rt-0:4.18.0-553.126.1.rt7.467.el8_10
kernel-0:4.18.0-477.150.1.el8_8
kernel-0:5.14.0-611.54.1.el9_7
kernel-0:6.12.0-124.55.1.el10_1
kernel-0:5.14.0-687.10.1.el9_8
kernel-0:5.14.0-284.174.1.el9_2
kernel-0:5.14.0-570.119.1.el9_6
kernel-0:6.12.0-55.77.1.el10_0

Official advisory · high-confidence parse· fetched 5 hours ago·verify at source

Fixed versions

RHSA-2026:19569

Official advisory · high-confidence parse· fetched 5 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:19569 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 5 hours ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation

CVE-2026-23270 Published Mar 18, 2026

CVE-2026-23270

Affected products & platforms

Red Hat & Ubuntu LinuxUnclassified

Summary

Affected versions

kernel-0:4.18.0-553.126.1.el8_10
kernel-0:5.14.0-427.127.1.el9_4
kernel-0:6.12.0-211.16.1.el10_2
kernel-rt-0:5.14.0-284.174.1.rt14.459.el9_2
kernel-rt-0:4.18.0-553.126.1.rt7.467.el8_10
kernel-0:4.18.0-477.150.1.el8_8
kernel-0:5.14.0-611.54.1.el9_7
kernel-0:6.12.0-124.55.1.el10_1
kernel-0:5.14.0-687.10.1.el9_8
kernel-0:5.14.0-284.174.1.el9_2
kernel-0:5.14.0-570.119.1.el9_6
kernel-0:6.12.0-55.77.1.el10_0

Official advisory · high-confidence parse· fetched 5 hours ago·verify at source

Fixed versions

RHSA-2026:19569

Official advisory · high-confidence parse· fetched 5 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:19569 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 5 hours ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.