{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80901","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.800Z","datePublished":"2026-09-04T17:11:15.780Z","dateUpdated":"2026-09-04T17:11:15.780Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-04T17:11:15.780Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix the checksum validations\n\nip_vs_in_icmp_v6() is missing checksum validation for ICMPv6\npackets from clients. In fact, as for TCP/UDP we should\nvalidate the checksum for ICMP packets only when we\nmangle the packets on MASQ or on reply for tunnel.\n\nAlso, Sashiko points out that handle_response_icmp() being\ncommon for IPv4 and IPv6 is missing the pseudo-header\ncalculation while validating ICMPv6 messages from real\nservers which is a problem if checksum is not validated\nby the hardware.\n\nFix the problems by creating ip_vs_checksum_common_check()\nhelper and use it for TCP/UDP/ICMP both for IPv4 and IPv6.\nRely on the nf_checksum() for validating the ICMP messages\nbut use it also for TCP and UDP.\n\nUse correct IP offset for IP_VS_DBG_RL_PKT for TCP/UDP/SCTP.\n\nIPVS packets (TCP/UDP/SCTP/ICMP) do not need checksum\nvalidation on LOCAL_OUT (local clients or local real\nservers) and on FORWARD (traffic from servers on LAN).\nDo it only on LOCAL_IN, in case nf_checksum() is not\ncalled on PRE_ROUTING.\n\nAlso, ip_vs_checksum_complete() can be marked static."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/ip_vs.h","net/netfilter/ipvs/ip_vs_core.c","net/netfilter/ipvs/ip_vs_proto_sctp.c","net/netfilter/ipvs/ip_vs_proto_tcp.c","net/netfilter/ipvs/ip_vs_proto_udp.c"],"versions":[{"version":"2a3b791e6e1169f374224d164738e9f7be703d77","lessThan":"d418d73acf8be62744dc47359dfdde8c2148845d","status":"affected","versionType":"git"},{"version":"2a3b791e6e1169f374224d164738e9f7be703d77","lessThan":"b3869d9b54e76dff64118dee4c8fd9302fcd5171","status":"affected","versionType":"git"},{"version":"2a3b791e6e1169f374224d164738e9f7be703d77","lessThan":"9cbe2c0fdb71904ee929b1851cdc1c73341a03c0","status":"affected","versionType":"git"},{"version":"2a3b791e6e1169f374224d164738e9f7be703d77","lessThan":"00eb23829fd08df1b5e057cb6b625996a70e7e65","status":"affected","versionType":"git"},{"version":"2a3b791e6e1169f374224d164738e9f7be703d77","lessThan":"5558a85add073215b298f3e044ff9a6d86d714ae","status":"affected","versionType":"git"},{"version":"2a3b791e6e1169f374224d164738e9f7be703d77","lessThan":"e876b75b9020a97bbdc79721e7fc749024891c65","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/ip_vs.h","net/netfilter/ipvs/ip_vs_core.c","net/netfilter/ipvs/ip_vs_proto_sctp.c","net/netfilter/ipvs/ip_vs_proto_tcp.c","net/netfilter/ipvs/ip_vs_proto_udp.c"],"versions":[{"version":"2.6.28","status":"affected"},{"version":"0","lessThan":"2.6.28","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d418d73acf8be62744dc47359dfdde8c2148845d"},{"url":"https://git.kernel.org/stable/c/b3869d9b54e76dff64118dee4c8fd9302fcd5171"},{"url":"https://git.kernel.org/stable/c/9cbe2c0fdb71904ee929b1851cdc1c73341a03c0"},{"url":"https://git.kernel.org/stable/c/00eb23829fd08df1b5e057cb6b625996a70e7e65"},{"url":"https://git.kernel.org/stable/c/5558a85add073215b298f3e044ff9a6d86d714ae"},{"url":"https://git.kernel.org/stable/c/e876b75b9020a97bbdc79721e7fc749024891c65"}],"title":"ipvs: fix the checksum validations","x_generator":{"engine":"bippy-1.2.0"}}}}