High8.8Vendor: CriticalRed Hat & Ubuntu Linux
clear skb2->cb[] in ip4ip6_err()
CVE-2026-43037 Published May 1, 2026
CVE-2026-43037
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
clear skb2->cb[] in ip4ip6_err(). Red Hat rates this critical (CVSS 8.8). Weakness: CWE-843. Affected package(s): kernel, rhcos, kernel-rt, kpatch-patch. Resolved in Red Hat advisory RHSA-2026:28741 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-0:4.18.0-305.194.1.el8_4
- kernel-0:4.18.0-477.145.1.el8_8
- rhcos-4.20.9.6.202606101223-0
- kernel-0:5.14.0-427.129.1.el9_4
- kernel-0:2.6.32-754.61.1.el6
- rhcos-414.92.202606231112-0
- kernel-rt-0:5.14.0-284.174.1.rt14.459.el9_2
- kernel-0:5.14.0-284.174.1.el9_2
- kernel-0:5.14.0-687.15.1.el9_8
- rhcos-418.94.202606051320-0
- kernel-0:6.12.0-55.77.1.el10_0
- kernel-0:6.12.0-212.10.el10nv
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Fixed versions
- RHSA-2026:28741
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:28741 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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