CVE-2026-98849

{
  "id": "CVE-2026-98849",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-18T16:17:39.283",
  "lastModified": "2026-10-19T10:19:49.007",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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->sk.\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->sk is NULL."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/pfcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba",
              "lessThan": "dcb8f6a79c3360a440c399d85df465a6e59351f1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba",
              "lessThan": "4b8ce1686dea1a10805a0807bf492409b0300ee1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba",
              "lessThan": "2cee3603ec1d9b5ec7f2121ea3efe9488e906f46",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "76c8764ef36a5d37ea2e551bda28ac7f028383ba",
              "lessThan": "0f17d2e3dd9cda3ee6d94033d5e5489af168920d",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/pfcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.10",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.56",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.10",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}