{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "76c8764ef36a5d37ea2e551bda28ac7f028383ba"
            },
            {
              "fixed": "dcb8f6a79c3360a440c399d85df465a6e59351f1"
            },
            {
              "fixed": "4b8ce1686dea1a10805a0807bf492409b0300ee1"
            },
            {
              "fixed": "2cee3603ec1d9b5ec7f2121ea3efe9488e906f46"
            },
            {
              "fixed": "0f17d2e3dd9cda3ee6d94033d5e5489af168920d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.10.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98849.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npfcp: fix socket lifetime on netdevice registration failure\n\npfcp_newlink() creates the UDP socket before register_netdevice().\nIf registration fails after pfcp_dev_init() succeeds, the core calls\npfcp_dev_uninit(), which releases the socket and clears pfcp-\u003esk.\nThe newlink error path then releases it again, causing a NULL pointer\ndereference. This was observed with failslab fault injection:\n\n  FAULT_INJECTION: forcing a failure.\n  kobject: kobject_add_internal failed for pfcp0 (error: -12 parent: net)\n  BUG: KASAN: null-ptr-deref in udp_tunnel_sock_release+0x1c/0x50\n  Read of size 8 at addr 0000000000000120 by task ip/1037\n  Call trace:\n   show_stack+0x18/0x24 (C)\n   dump_stack_lvl+0x78/0x90\n   print_report+0x468/0x5cc\n   kasan_report+0xa4/0xf0\n   __asan_load8+0x7c/0xd0\n   udp_tunnel_sock_release+0x1c/0x50\n   pfcp_newlink+0x128/0x184\n   rtnl_newlink+0x848/0xe44\n   rtnetlink_rcv_msg+0x468/0x514\n   netlink_rcv_skb+0xc0/0x1f0\n   rtnetlink_rcv+0x18/0x24\n   netlink_unicast+0x4b8/0x558\n   netlink_sendmsg+0x2b8/0x584\n   ...\n\nReturn from pfcp_del_sock() if pfcp-\u003esk is NULL.",
  "id": "CVE-2026-98849",
  "modified": "2026-10-20T02:30:54.264424572Z",
  "published": "2026-10-18T15:50:48.743Z",
  "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/0f17d2e3dd9cda3ee6d94033d5e5489af168920d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98849.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98849"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "pfcp: fix socket lifetime on netdevice registration failure"
}