Bug 2482022 (CVE-2026-45850)

Summary: CVE-2026-45850 kernel: ipvs: skip ipv6 extension headers for csum checks
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's IP Virtual Server (IPVS) component. A remote attacker could send specially crafted IPv6 packets with extension headers, causing the system to fail protocol checksum validation. This could lead to incorrect packet processing or a denial of service (DoS), impacting network service availability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-27 15:07:29 UTC
In the Linux kernel, the following vulnerability has been resolved:

ipvs: skip ipv6 extension headers for csum checks

Protocol checksum validation fails for IPv6 if there are extension
headers before the protocol header. iph->len already contains its
offset, so use it to fix the problem.