{"api_version":"1","generated_at":"2026-09-11T16:03:00+00:00","cve":"CVE-2026-80901","urls":{"html":"https://cve.report/CVE-2026-80901","api":"https://cve.report/api/cve/CVE-2026-80901.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80901","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80901"},"summary":{"title":"ipvs: fix the checksum validations","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 18:17:58","updated_at":"2026-09-04 18:17:58"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/00eb23829fd08df1b5e057cb6b625996a70e7e65","name":"https://git.kernel.org/stable/c/00eb23829fd08df1b5e057cb6b625996a70e7e65","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5558a85add073215b298f3e044ff9a6d86d714ae","name":"https://git.kernel.org/stable/c/5558a85add073215b298f3e044ff9a6d86d714ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9cbe2c0fdb71904ee929b1851cdc1c73341a03c0","name":"https://git.kernel.org/stable/c/9cbe2c0fdb71904ee929b1851cdc1c73341a03c0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d418d73acf8be62744dc47359dfdde8c2148845d","name":"https://git.kernel.org/stable/c/d418d73acf8be62744dc47359dfdde8c2148845d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e876b75b9020a97bbdc79721e7fc749024891c65","name":"https://git.kernel.org/stable/c/e876b75b9020a97bbdc79721e7fc749024891c65","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b3869d9b54e76dff64118dee4c8fd9302fcd5171","name":"https://git.kernel.org/stable/c/b3869d9b54e76dff64118dee4c8fd9302fcd5171","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80901","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80901","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a3b791e6e1169f374224d164738e9f7be703d77 d418d73acf8be62744dc47359dfdde8c2148845d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a3b791e6e1169f374224d164738e9f7be703d77 b3869d9b54e76dff64118dee4c8fd9302fcd5171 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a3b791e6e1169f374224d164738e9f7be703d77 9cbe2c0fdb71904ee929b1851cdc1c73341a03c0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a3b791e6e1169f374224d164738e9f7be703d77 00eb23829fd08df1b5e057cb6b625996a70e7e65 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a3b791e6e1169f374224d164738e9f7be703d77 5558a85add073215b298f3e044ff9a6d86d714ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a3b791e6e1169f374224d164738e9f7be703d77 e876b75b9020a97bbdc79721e7fc749024891c65 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.28","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.28 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80901","cve":"CVE-2026-80901","epss":"0.001610000","percentile":"0.055690000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:26"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","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"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d418d73acf8be62744dc47359dfdde8c2148845d","status":"affected","version":"2a3b791e6e1169f374224d164738e9f7be703d77","versionType":"git"},{"lessThan":"b3869d9b54e76dff64118dee4c8fd9302fcd5171","status":"affected","version":"2a3b791e6e1169f374224d164738e9f7be703d77","versionType":"git"},{"lessThan":"9cbe2c0fdb71904ee929b1851cdc1c73341a03c0","status":"affected","version":"2a3b791e6e1169f374224d164738e9f7be703d77","versionType":"git"},{"lessThan":"00eb23829fd08df1b5e057cb6b625996a70e7e65","status":"affected","version":"2a3b791e6e1169f374224d164738e9f7be703d77","versionType":"git"},{"lessThan":"5558a85add073215b298f3e044ff9a6d86d714ae","status":"affected","version":"2a3b791e6e1169f374224d164738e9f7be703d77","versionType":"git"},{"lessThan":"e876b75b9020a97bbdc79721e7fc749024891c65","status":"affected","version":"2a3b791e6e1169f374224d164738e9f7be703d77","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","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"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.28"},{"lessThan":"2.6.28","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"2.6.28","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.28","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-04T17:11:15.780Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80901","datePublished":"2026-09-04T17:11:15.780Z","dateReserved":"2026-08-26T14:34:25.800Z","dateUpdated":"2026-09-04T17:11:15.780Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 18:17:58","lastModifiedDate":"2026-09-04 18:17:58","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80901","Ordinal":"1","Title":"ipvs: fix the checksum validations","CVE":"CVE-2026-80901","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80901","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ipvs: fix the checksum validations"}]}}}