{"api_version":"1","generated_at":"2026-09-25T12:40:15+00:00","cve":"CVE-2026-98098","urls":{"html":"https://cve.report/CVE-2026-98098","api":"https://cve.report/api/cve/CVE-2026-98098.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98098","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98098"},"summary":{"title":"tipc: fix NULL deref in tipc_named_node_up() on empty publication list","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix NULL deref in tipc_named_node_up() on empty publication list\n\nUser-space applications can bind a large number of service addresses to\none or more sockets. Each binding of a local-scope service address inserts\none entry (publication) into the TIPC name table. If the number of these\npublications exceeds TIPC_MAX_PUBL (65535), protocol service types\n(such as node state and link state) are no longer inserted into the name\ntable. This causes two issues:\n\n1. User-space applications subscribing to node or link up/down events\n   stop receiving notifications.\n\n2. A NULL pointer dereference can occur:\n\n   BUG: kernel NULL pointer dereference, address: 00000000000000d0\n   ...\n   CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc4-default+ #5 PREEMPT(full)\n   ...\n   RIP: 0010:tipc_named_node_up (./include/linux/skbuff.h:2251 net/tipc/name_distr.c:195 net/tipc/name_distr.c:221)\n   ...\n   Call Trace:\n   <IRQ>\n   tipc_node_write_unlock (net/tipc/node.c:428)\n   tipc_rcv (net/tipc/node.c:934 net/tipc/node.c:2189)\n   tipc_udp_recv (net/tipc/udp_media.c:389)\n\n   Thread 1 (tipc_net_finalize) | Thread 2 (named_distribute)\n   -----------------------------|-----------------------------\n                                | ...\n                                | list_for_each_entry(publ, pls, binding_node) {\n                                | ...\n                                | __skb_queue_tail(list, skb);\n                                | ...\n                                | }\n                                | ...\n                                | hdr = buf_msg(skb_peek_tail(list));\n   ...                          |\n   tipc_nametbl_publish();      |\n\n   If 'tipc_nametbl_publish()' (Thread 1) fails because the number of\n   local publications reaches TIPC_MAX_PUBL, list (Thread 2) will be empty. As a\n   result, NULL is passed to 'buf_msg()', leading to a NULL pointer dereference.\n\nFix these issues by allowing protocol service types (node state, link state,\nand topology server) to be inserted into the name table unconditionally.\nThis ensures that users subscribing to these types always receive\nnotifications. In addition, the maximum number of local user publications is\nreduced to (TIPC_MAX_PUBL - 1). This ensures that the maximum bulk size\ncalculated in tipc_link_set_queue_limits() remains valid.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:39","updated_at":"2026-09-25 11:17:39"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b","name":"https://git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105","name":"https://git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3","name":"https://git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895","name":"https://git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98098","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98098","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a5e7ac5ce134d8f72f59631011fafa7bbf7ca174 68619f965329d2f7b113a3d5811aa23198f39105 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a5e7ac5ce134d8f72f59631011fafa7bbf7ca174 ad805326d874062f8bc72a94884f86046148cde3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a5e7ac5ce134d8f72f59631011fafa7bbf7ca174 d0d82f1214f321143c5dbc2e48e4a4e6c4226895 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a5e7ac5ce134d8f72f59631011fafa7bbf7ca174 b3b76e9f4f2476f1135b2ba7743a821db4a0df4b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc2 * 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":["net/tipc/name_table.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"68619f965329d2f7b113a3d5811aa23198f39105","status":"affected","version":"a5e7ac5ce134d8f72f59631011fafa7bbf7ca174","versionType":"git"},{"lessThan":"ad805326d874062f8bc72a94884f86046148cde3","status":"affected","version":"a5e7ac5ce134d8f72f59631011fafa7bbf7ca174","versionType":"git"},{"lessThan":"d0d82f1214f321143c5dbc2e48e4a4e6c4226895","status":"affected","version":"a5e7ac5ce134d8f72f59631011fafa7bbf7ca174","versionType":"git"},{"lessThan":"b3b76e9f4f2476f1135b2ba7743a821db4a0df4b","status":"affected","version":"a5e7ac5ce134d8f72f59631011fafa7bbf7ca174","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/tipc/name_table.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.15"},{"lessThan":"3.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc2","versionStartIncluding":"3.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix NULL deref in tipc_named_node_up() on empty publication list\n\nUser-space applications can bind a large number of service addresses to\none or more sockets. Each binding of a local-scope service address inserts\none entry (publication) into the TIPC name table. If the number of these\npublications exceeds TIPC_MAX_PUBL (65535), protocol service types\n(such as node state and link state) are no longer inserted into the name\ntable. This causes two issues:\n\n1. User-space applications subscribing to node or link up/down events\n   stop receiving notifications.\n\n2. A NULL pointer dereference can occur:\n\n   BUG: kernel NULL pointer dereference, address: 00000000000000d0\n   ...\n   CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc4-default+ #5 PREEMPT(full)\n   ...\n   RIP: 0010:tipc_named_node_up (./include/linux/skbuff.h:2251 net/tipc/name_distr.c:195 net/tipc/name_distr.c:221)\n   ...\n   Call Trace:\n   <IRQ>\n   tipc_node_write_unlock (net/tipc/node.c:428)\n   tipc_rcv (net/tipc/node.c:934 net/tipc/node.c:2189)\n   tipc_udp_recv (net/tipc/udp_media.c:389)\n\n   Thread 1 (tipc_net_finalize) | Thread 2 (named_distribute)\n   -----------------------------|-----------------------------\n                                | ...\n                                | list_for_each_entry(publ, pls, binding_node) {\n                                | ...\n                                | __skb_queue_tail(list, skb);\n                                | ...\n                                | }\n                                | ...\n                                | hdr = buf_msg(skb_peek_tail(list));\n   ...                          |\n   tipc_nametbl_publish();      |\n\n   If 'tipc_nametbl_publish()' (Thread 1) fails because the number of\n   local publications reaches TIPC_MAX_PUBL, list (Thread 2) will be empty. As a\n   result, NULL is passed to 'buf_msg()', leading to a NULL pointer dereference.\n\nFix these issues by allowing protocol service types (node state, link state,\nand topology server) to be inserted into the name table unconditionally.\nThis ensures that users subscribing to these types always receive\nnotifications. In addition, the maximum number of local user publications is\nreduced to (TIPC_MAX_PUBL - 1). This ensures that the maximum bulk size\ncalculated in tipc_link_set_queue_limits() remains valid."}],"providerMetadata":{"dateUpdated":"2026-09-25T10:24:28.298Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105"},{"url":"https://git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3"},{"url":"https://git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895"},{"url":"https://git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b"}],"title":"tipc: fix NULL deref in tipc_named_node_up() on empty publication list","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98098","datePublished":"2026-09-25T10:24:28.298Z","dateReserved":"2026-09-25T10:19:56.077Z","dateUpdated":"2026-09-25T10:24:28.298Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:39","lastModifiedDate":"2026-09-25 11:17:39","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98098","Ordinal":"1","Title":"tipc: fix NULL deref in tipc_named_node_up() on empty publicatio","CVE":"CVE-2026-98098","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98098","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix NULL deref in tipc_named_node_up() on empty publication list\n\nUser-space applications can bind a large number of service addresses to\none or more sockets. Each binding of a local-scope service address inserts\none entry (publication) into the TIPC name table. If the number of these\npublications exceeds TIPC_MAX_PUBL (65535), protocol service types\n(such as node state and link state) are no longer inserted into the name\ntable. This causes two issues:\n\n1. User-space applications subscribing to node or link up/down events\n   stop receiving notifications.\n\n2. A NULL pointer dereference can occur:\n\n   BUG: kernel NULL pointer dereference, address: 00000000000000d0\n   ...\n   CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc4-default+ #5 PREEMPT(full)\n   ...\n   RIP: 0010:tipc_named_node_up (./include/linux/skbuff.h:2251 net/tipc/name_distr.c:195 net/tipc/name_distr.c:221)\n   ...\n   Call Trace:\n   <IRQ>\n   tipc_node_write_unlock (net/tipc/node.c:428)\n   tipc_rcv (net/tipc/node.c:934 net/tipc/node.c:2189)\n   tipc_udp_recv (net/tipc/udp_media.c:389)\n\n   Thread 1 (tipc_net_finalize) | Thread 2 (named_distribute)\n   -----------------------------|-----------------------------\n                                | ...\n                                | list_for_each_entry(publ, pls, binding_node) {\n                                | ...\n                                | __skb_queue_tail(list, skb);\n                                | ...\n                                | }\n                                | ...\n                                | hdr = buf_msg(skb_peek_tail(list));\n   ...                          |\n   tipc_nametbl_publish();      |\n\n   If 'tipc_nametbl_publish()' (Thread 1) fails because the number of\n   local publications reaches TIPC_MAX_PUBL, list (Thread 2) will be empty. As a\n   result, NULL is passed to 'buf_msg()', leading to a NULL pointer dereference.\n\nFix these issues by allowing protocol service types (node state, link state,\nand topology server) to be inserted into the name table unconditionally.\nThis ensures that users subscribing to these types always receive\nnotifications. In addition, the maximum number of local user publications is\nreduced to (TIPC_MAX_PUBL - 1). This ensures that the maximum bulk size\ncalculated in tipc_link_set_queue_limits() remains valid.","Type":"Description","Title":"tipc: fix NULL deref in tipc_named_node_up() on empty publicatio"}]}}}