{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2a3b791e6e1169f374224d164738e9f7be703d77"
            },
            {
              "fixed": "d418d73acf8be62744dc47359dfdde8c2148845d"
            },
            {
              "fixed": "b3869d9b54e76dff64118dee4c8fd9302fcd5171"
            },
            {
              "fixed": "9cbe2c0fdb71904ee929b1851cdc1c73341a03c0"
            },
            {
              "fixed": "00eb23829fd08df1b5e057cb6b625996a70e7e65"
            },
            {
              "fixed": "5558a85add073215b298f3e044ff9a6d86d714ae"
            },
            {
              "fixed": "e876b75b9020a97bbdc79721e7fc749024891c65"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.28"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.151"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80901.json"
  },
  "details": "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.",
  "id": "CVE-2026-80901",
  "modified": "2026-09-06T03:30:49.190034586Z",
  "published": "2026-09-04T17:11:15.780Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00eb23829fd08df1b5e057cb6b625996a70e7e65"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5558a85add073215b298f3e044ff9a6d86d714ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cbe2c0fdb71904ee929b1851cdc1c73341a03c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3869d9b54e76dff64118dee4c8fd9302fcd5171"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d418d73acf8be62744dc47359dfdde8c2148845d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e876b75b9020a97bbdc79721e7fc749024891c65"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80901.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80901"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ipvs: fix the checksum validations"
}