{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b"
            },
            {
              "fixed": "ca96b38730e31357ef4a9d76af1336958ac670d7"
            },
            {
              "fixed": "531255de8971c06d5d5986f85fdc2525d707ba71"
            },
            {
              "fixed": "543354c6efb27eae3372a3a9674aeaa2a86e2b2c"
            },
            {
              "fixed": "dc92cb972e86790b8078337ec41015b748b8f8e5"
            },
            {
              "fixed": "1c70275ca87e769e1a52abc644d61372d8c016cb"
            },
            {
              "fixed": "1d42828565889632068fbc2983c34d57c66af4e0"
            },
            {
              "fixed": "4254d5878c320c19961dd0b8e1d0aca4800d8b7d"
            },
            {
              "fixed": "ee319bd3a0e976af5087cbe59ebc50a66f31d202"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.8.0"
            },
            {
              "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-2026-98532.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: do not let ipv6_find_hdr() return an offset past the packet end\n\nipv6_find_hdr() walks the extension header chain, skipping each header by\nthe length that header itself declares.  ipv6_optlen() returns up to 2048,\nand the skip is never checked against skb-\u003elen, so the offset stored in\n*offset can point past the end of the packet.\n\nopenvswitch installs that offset as the transport header, and\nupdate_ipv6_checksum() then reads and writes the transport checksum field\nout of bounds:\n\n  BUG: KASAN: slab-use-after-free in inet_proto_csum_replace16+0x445/0x470\n  Read of size 2 at addr ffff88810b754b06 by task ovs_ipv6_oob/629\n  CPU: 4 UID: 1000 PID: 629 Comm: ovs_ipv6_oob Tainted: G N 7.3.0-rc3+ #348\n  Call Trace:\n   inet_proto_csum_replace16+0x445/0x470\n   set_ipv6_addr+0x3dd/0x460\n   do_execute_actions+0x6a3d/0x7c40\n   ovs_execute_actions+0xfd/0x480\n   ovs_packet_cmd_execute+0xc38/0xf20\n   genl_rcv_msg+0x59e/0x870\n   netlink_rcv_skb+0x18b/0x450\n   genl_rcv+0x2d/0x40\n   netlink_unicast+0x6bc/0xa20\n\n  The buggy address belongs to the object at ffff88810b754980\n   which belongs to the cache skbuff_small_head of size 704\n  The buggy address is located 390 bytes inside of\n   freed 704-byte region [ffff88810b754980, ffff88810b754c40)\n\nOther callers use that offset too, so bound it here rather than in one\ncaller.\n\nReject a header whose declared length does not fit in the packet.\nipv6_find_hdr() already fails with -EBADMSG on a malformed chain, so this\nadds no new failure mode.",
  "id": "CVE-2026-98532",
  "modified": "2026-10-20T02:30:21.420436508Z",
  "published": "2026-10-18T15:17:50.490Z",
  "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/1c70275ca87e769e1a52abc644d61372d8c016cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98532.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98532"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ipv6: do not let ipv6_find_hdr() return an offset past the packet end"
}