High7.3Red Hat & Ubuntu Linux
clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()
CVE-2026-43038 Published May 1, 2026
CVE-2026-43038
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
clear skb2->cb[] in ip6_err_gen_icmpv6_unreach(). Red Hat rates this important (CVSS 7.3). Weakness: CWE-843. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:25120 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-0:4.18.0-305.194.1.el8_4
- kernel-rt-0:4.18.0-553.132.1.rt7.473.el8_10
- kernel-0:4.18.0-477.145.1.el8_8
- kernel-0:5.14.0-427.129.1.el9_4
- kernel-0:4.18.0-372.195.1.el8_6
- kernel-rt-0:5.14.0-284.174.1.rt14.459.el9_2
- kernel-0:4.18.0-553.132.1.el8_10
- kernel-0:5.14.0-687.19.1.el9_8
- kernel-0:5.14.0-284.174.1.el9_2
- kernel-0:6.12.0-211.28.1.el10_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 4 hours ago·verify at source
Fixed versions
- RHSA-2026:25120
Official advisory · high-confidence parse· fetched 4 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:25120 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 4 hours ago·verify at source
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