High7.0Red Hat & Ubuntu Linux
Linux kernel: Use-after-free in teql queueing discipline can lead to privilege escalation
CVE-2026-23074 Published Feb 4, 2026
CVE-2026-23074
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Linux kernel: Use-after-free in teql queueing discipline can lead to privilege escalation. Red Hat rates this important (CVSS 7). Weakness: CWE-825. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:3634 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-0:3.10.0-1160.147.1.el7
- kernel-0:4.18.0-477.130.1.el8_8
- kernel-0:4.18.0-553.107.1.el8_10
- kernel-0:4.18.0-193.187.1.el8_2
- kernel-0:4.18.0-372.181.1.el8_6
- kernel-rt-0:3.10.0-1160.147.1.rt56.1299.el7
- kernel-rt-0:4.18.0-553.107.1.rt7.448.el8_10
- kernel-0:4.18.0-305.186.1.el8_4
- kernel-0:2.6.32-754.59.1.el6
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
Fixed versions
- RHSA-2026:3634
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:3634 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
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