{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e490d1d85cf5e191791979e5f260d32eb4f703a8"
            },
            {
              "fixed": "44fe898df302e91c5ee5acbc71ffa74e78e6c183"
            },
            {
              "fixed": "0dadb0620ab65949a8bc2439dd28ea3c942fe87d"
            },
            {
              "fixed": "b6816536a2990c0db44a26130a03e40b441e829b"
            },
            {
              "fixed": "64e41736a26f37ab6215bc2e6df125df05aceb08"
            },
            {
              "fixed": "484134e1eb07d700a73b1e4bbf3fb503e299be60"
            },
            {
              "fixed": "4eb15c465337b18f44716c499cd6ad63eee0ad54"
            },
            {
              "fixed": "fbf40faa0414b753212494ad197542002e66ed9e"
            },
            {
              "fixed": "f803c086399da277b5d0ff36a107d0f162751800"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.22"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.152"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74597.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_tunnel: clear skb2-\u003ecb[] in ip6ip6_err()\n\nip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the\nquoted inner IPv6 packet, and then passes the clone to icmpv6_send().\nThe clone still carries the outer packet's inet6_skb_parm in skb-\u003ecb.\n\nIf the outer packet had a Home Address Option, IP6CB(skb2)-\u003edsthao\nremains non-zero after skb_pull(). icmpv6_send() later calls\nmip6_addr_swap(), which uses that stale dsthao offset against the quoted\ninner packet. A malformed inner destination-options header can then make\nthe HAO lookup and address swap run past the end of the quoted packet\nand corrupt skb_shared_info.\n\nClear skb2-\u003ecb[] before pulling the quoted inner IPv6 packet so the\nreply path does not reuse metadata left by the outer IPv6 stack.",
  "id": "CVE-2026-74597",
  "modified": "2026-08-27T11:30:26.912727642Z",
  "published": "2026-08-22T15:31:47.120Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74597.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74597"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ip6_tunnel: clear skb2-\u003ecb[] in ip6ip6_err()"
}