{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1431fb31ecbaba1b5718006128f0f2ed0b94e1c3"
            },
            {
              "fixed": "9c4e432132a97b82edf28fa172c39f743e6bfb26"
            },
            {
              "fixed": "718747afa5463d9cc5fd9a09f03b2a492edd9b78"
            },
            {
              "fixed": "a0ad0473c09d2e947aecac5c82e637ec85924b12"
            },
            {
              "fixed": "b2da5ed3d8c75e1b729a21b6d3beaed415e263f6"
            },
            {
              "fixed": "6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b"
            },
            {
              "fixed": "cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962"
            },
            {
              "fixed": "d7f474226809471dc7877435e9c492cc914df0bf"
            },
            {
              "fixed": "3b4e0b0c008a8c1b474730248cd5b873026c74bd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98573.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()\n\nskb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max\nargument and passes the result to __pskb_pull_tail() as a signed int.  The\nfunction does not ensure that max is at least skb_headlen(skb).\n\nThis can happen while parsing IPv6 extension headers when an skb already\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data\nbeyond the linear area, max - skb_headlen(skb) wraps and is converted to a\nnegative delta.  __pskb_pull_tail() then passes that negative length to\nskb_copy_bits(), where it can become a very large copy length.\n\nPass the requested length itself as the pull bound at the three\nextension-header call sites, so the delta can no longer go negative.",
  "id": "CVE-2026-98573",
  "modified": "2026-10-19T02:30:20.051733533Z",
  "published": "2026-10-18T15:18:38.914Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98573.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98573"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()"
}