{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "217ac77a3c2524d999730b2a80b61fcc2d0f734a"
            },
            {
              "fixed": "e85278afd4890dd190ba3c7a1b1a712b801c9fe1"
            },
            {
              "fixed": "81f9b09f0ea3ba9ab966dd17e9f32625a14555e9"
            },
            {
              "fixed": "831471718f6e19aed1a330b03b53190a90e06466"
            },
            {
              "fixed": "d8bea341b183190ce6c055ab0e64ab78eb9a7290"
            },
            {
              "fixed": "0b60b55652ba772b173dddc63f3851e1d2dd5927"
            },
            {
              "fixed": "a8139285c8925efe59af28a9169bb2fda91bff15"
            },
            {
              "fixed": "9b8cfbb58b85bfa7a78fac47fdc77396cd01f699"
            },
            {
              "fixed": "cf6f8b29befb92173659bcef6a441d274947bfae"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.10.0"
            },
            {
              "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-2026-74701.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/openvswitch: check Ethernet header length in key_extract()\n\nWhen a packet arrives on an ARPHRD_NONE device (e.g. TUN),\novs_flow_key_extract() trusts the user-provided skb-\u003eprotocol field: if\nit is ETH_P_TEB, the packet is classified as MAC_PROTO_ETHERNET and\nkey_extract() is called without ensuring the skb has ETH_HLEN (14) bytes\nof linear data. key_extract() unconditionally pulls 2 * ETH_ALEN bytes\nfor MAC addresses and parse_ethertype() pulls 2 more, either of which\ntriggers a kernel BUG in __skb_pull() when the linear area is too small.\n\n  kernel BUG at include/linux/skbuff.h:2848!\n  RIP: 0010:key_extract+0xa7e/0xd90 net/openvswitch/flow.c:933\n  ovs_flow_key_extract+0x419/0xa70\n  ovs_vport_receive+0x222/0x390\n  netdev_frame_hook+0x3e0/0x630\n  tun_get_user+0x2d0c/0x38e0\n\nFixed by calling check_header() in key_extract() before accessing the\nEthernet header.",
  "id": "CVE-2026-74701",
  "modified": "2026-08-24T11:35:43.477260106Z",
  "published": "2026-08-22T15:33:01.585Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b60b55652ba772b173dddc63f3851e1d2dd5927"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81f9b09f0ea3ba9ab966dd17e9f32625a14555e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/831471718f6e19aed1a330b03b53190a90e06466"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b8cfbb58b85bfa7a78fac47fdc77396cd01f699"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8139285c8925efe59af28a9169bb2fda91bff15"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf6f8b29befb92173659bcef6a441d274947bfae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8bea341b183190ce6c055ab0e64ab78eb9a7290"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e85278afd4890dd190ba3c7a1b1a712b801c9fe1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74701.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74701"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/openvswitch: check Ethernet header length in key_extract()"
}