In the Linux kernel, the following vulnerability has been resolved: ipvs: fix more places with wrong ipv6 transport offsets Sashiko reports for more… (CVE-2026-68477)
A vulnerability in the Linux kernel's IP Virtual Server (ipvs) subsystem involved incorrect handling of IPv6 transport offsets, causing the TCP app code to incorrectly assume IPv4 headers. This issue affected checksum calculations for ICMPv6 packets with extension headers. The vulnerability has been resolved by correcting the offset calculations.
AI Analysis
Technical Summary
The Linux kernel ipvs subsystem had multiple incorrect IPv6 transport offset calculations. Specifically, the TCP application code assumed IPv4 network headers even when IPv6 was used, potentially causing issues with applications over IPv6. Additionally, the ICMPv6 header offset was incorrect in ip_vs_out_icmp_v6(), affecting checksum verification when IPv6 packets contained extension headers. The vulnerability was reported by Sashiko and has been fixed to correctly handle IPv6 transport offsets.
Potential Impact
The incorrect IPv6 transport offsets could cause problems with applications using IPv6 over ipvs, potentially leading to incorrect packet processing or checksum failures. However, for the only official kernel app (FTP), the problem was harmless due to Netfilter handling port mangling and no TCP sequence number adjustments. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix has been applied to the Linux kernel ipvs subsystem to correct IPv6 transport offset handling. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the vendor advisory or Linux kernel mailing lists for the official patch and update guidance.
In the Linux kernel, the following vulnerability has been resolved: ipvs: fix more places with wrong ipv6 transport offsets Sashiko reports for more… (CVE-2026-68477)
Description
A vulnerability in the Linux kernel's IP Virtual Server (ipvs) subsystem involved incorrect handling of IPv6 transport offsets, causing the TCP app code to incorrectly assume IPv4 headers. This issue affected checksum calculations for ICMPv6 packets with extension headers. The vulnerability has been resolved by correcting the offset calculations.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel ipvs subsystem had multiple incorrect IPv6 transport offset calculations. Specifically, the TCP application code assumed IPv4 network headers even when IPv6 was used, potentially causing issues with applications over IPv6. Additionally, the ICMPv6 header offset was incorrect in ip_vs_out_icmp_v6(), affecting checksum verification when IPv6 packets contained extension headers. The vulnerability was reported by Sashiko and has been fixed to correctly handle IPv6 transport offsets.
Potential Impact
The incorrect IPv6 transport offsets could cause problems with applications using IPv6 over ipvs, potentially leading to incorrect packet processing or checksum failures. However, for the only official kernel app (FTP), the problem was harmless due to Netfilter handling port mangling and no TCP sequence number adjustments. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix has been applied to the Linux kernel ipvs subsystem to correct IPv6 transport offset handling. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the vendor advisory or Linux kernel mailing lists for the official patch and update guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-g55r-28w7-4fjw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-68477"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a808b79bf8831d539502816
Added to database: 08/15/2026, 15:53:29 UTC
Last enriched: 08/15/2026, 17:11:25 UTC
Last updated: 08/16/2026, 00:41:15 UTC
Views: 4
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