{"api_version":"1","generated_at":"2026-10-21T16:51:54+00:00","cve":"CVE-2026-98849","urls":{"html":"https://cve.report/CVE-2026-98849","api":"https://cve.report/api/cve/CVE-2026-98849.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98849","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98849"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:39","updated_at":"2026-10-19 10:19:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1","name":"https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d","name":"https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46","name":"https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1","name":"https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98849","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98849","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 76c8764ef36a5d37ea2e551bda28ac7f028383ba dcb8f6a79c3360a440c399d85df465a6e59351f1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 76c8764ef36a5d37ea2e551bda28ac7f028383ba 4b8ce1686dea1a10805a0807bf492409b0300ee1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 76c8764ef36a5d37ea2e551bda28ac7f028383ba 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 76c8764ef36a5d37ea2e551bda28ac7f028383ba 0f17d2e3dd9cda3ee6d94033d5e5489af168920d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/pfcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dcb8f6a79c3360a440c399d85df465a6e59351f1","status":"affected","version":"76c8764ef36a5d37ea2e551bda28ac7f028383ba","versionType":"git"},{"lessThan":"4b8ce1686dea1a10805a0807bf492409b0300ee1","status":"affected","version":"76c8764ef36a5d37ea2e551bda28ac7f028383ba","versionType":"git"},{"lessThan":"2cee3603ec1d9b5ec7f2121ea3efe9488e906f46","status":"affected","version":"76c8764ef36a5d37ea2e551bda28ac7f028383ba","versionType":"git"},{"lessThan":"0f17d2e3dd9cda3ee6d94033d5e5489af168920d","status":"affected","version":"76c8764ef36a5d37ea2e551bda28ac7f028383ba","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/pfcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.10"},{"lessThan":"6.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:26:41.559Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1"},{"url":"https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1"},{"url":"https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46"},{"url":"https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d"}],"title":"pfcp: fix socket lifetime on netdevice registration failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98849","datePublished":"2026-10-18T15:50:48.743Z","dateReserved":"2026-09-25T10:25:14.375Z","dateUpdated":"2026-10-19T09:26:41.559Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:39","lastModifiedDate":"2026-10-19 10:19:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98849","Ordinal":"1","Title":"pfcp: fix socket lifetime on netdevice registration failure","CVE":"CVE-2026-98849","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98849","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"pfcp: fix socket lifetime on netdevice registration failure"}]}}}