{"id":"CVE-2026-98849","revision":"e418a0a0c1ed40008337e202f27cef92","records":[{"revision":"e418a0a0c1ed40008337e202f27cef92","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98849","aliases":[],"title":"pfcp: fix socket lifetime on netdevice registration failure","description":"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.","state":0,"publishedAt":"2026-10-18T15:50:48.743+00:00","modifiedAt":"2026-10-19T09:26:41.559+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/pfcp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"76c8764ef36a5d37ea2e551bda28ac7f028383ba\",\n                            \"lessThan\": \"dcb8f6a79c3360a440c399d85df465a6e59351f1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"76c8764ef36a5d37ea2e551bda28ac7f028383ba\",\n                            \"lessThan\": \"4b8ce1686dea1a10805a0807bf492409b0300ee1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"76c8764ef36a5d37ea2e551bda28ac7f028383ba\",\n                            \"lessThan\": \"2cee3603ec1d9b5ec7f2121ea3efe9488e906f46\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"76c8764ef36a5d37ea2e551bda28ac7f028383ba\",\n                            \"lessThan\": \"0f17d2e3dd9cda3ee6d94033d5e5489af168920d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/pfcp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.56\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.10\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1","https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1","https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46","https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98849","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98849","identifiers":["CVE-2026-98849"]},"retained":false,"historicalAffected":[]}],"coverage":[]}