CVE-2026-98098
Estado: En análisisSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix NULL deref in tipc_named_node_up() on empty publication list
User-space applications can bind a large number of service addresses to one or more sockets. Each binding of a local-scope service address inserts one entry (publication) into the TIPC name table. If the number of these publications exceeds TIPC_MAX_PUBL (65535), protocol service types (such as node state and link state) are no longer inserted into the name table. This causes two issues:
2. A NULL pointer dereference can occur:
Fix these issues by allowing protocol service types (node state, link state, and topology server) to be inserted into the name table unconditionally.
Leer descripción completaMostrar menos
This ensures that users subscribing to these types always receive notifications. In addition, the maximum number of local user publications is reduced to (TIPC_MAX_PUBL - 1). This ensures that the maximum bulk size calculated in tipc_link_set_queue_limits() remains valid.
Detalles técnicos trazas, registros y código del informe original
1. User-space applications subscribing to node or link up/down events
stop receiving notifications.
BUG: kernel NULL pointer dereference, address: 00000000000000d0
...
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc4-default+ #5 PREEMPT(full)
...
RIP: 0010:tipc_named_node_up (./include/linux/skbuff.h:2251 net/tipc/name_distr.c:195 net/tipc/name_distr.c:221)
...
Call Trace:
<IRQ>
tipc_node_write_unlock (net/tipc/node.c:428)
tipc_rcv (net/tipc/node.c:934 net/tipc/node.c:2189)
tipc_udp_recv (net/tipc/udp_media.c:389)
Thread 1 (tipc_net_finalize) | Thread 2 (named_distribute)
-----------------------------|-----------------------------
| ...
| list_for_each_entry(publ, pls, binding_node) {
| ...
| __skb_queue_tail(list, skb);
| ...
| }
| ...
| hdr = buf_msg(skb_peek_tail(list));
... |
tipc_nametbl_publish(); |
If 'tipc_nametbl_publish()' (Thread 1) fails because the number of
local publications reaches TIPC_MAX_PUBL, list (Thread 2) will be empty. As a
result, NULL is passed to 'buf_msg()', leading to a NULL pointer dereference.CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/246a4b4aace490664927042e93400a6f940d197f
- https://git.kernel.org/stable/c/6188cf0c989dea60f2efe800eaebb7d0bd16e2b2
- https://git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105
- https://git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3
- https://git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b
- https://git.kernel.org/stable/c/b5344e459996afb45e30fdc407b41e6674793b21
- https://git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98098",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "246a4b4aace490664927042e93400a6f940d197f",
"versionType": "git"
},
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "6188cf0c989dea60f2efe800eaebb7d0bd16e2b2",
"versionType": "git"
},
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "b5344e459996afb45e30fdc407b41e6674793b21",
"versionType": "git"
},
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "68619f965329d2f7b113a3d5811aa23198f39105",
"versionType": "git"
},
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "ad805326d874062f8bc72a94884f86046148cde3",
"versionType": "git"
},
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "d0d82f1214f321143c5dbc2e48e4a4e6c4226895",
"versionType": "git"
},
{
"status": "affected",
"version": "a5e7ac5ce134d8f72f59631011fafa7bbf7ca174",
"lessThan": "b3b76e9f4f2476f1135b2ba7743a821db4a0df4b",
"versionType": "git"
}
],
"programFiles": [
"net/tipc/name_table.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/tipc/name_table.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-25T11:17:39.597",
"references": [
{
"url": "https://git.kernel.org/stable/c/246a4b4aace490664927042e93400a6f940d197f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6188cf0c989dea60f2efe800eaebb7d0bd16e2b2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b5344e459996afb45e30fdc407b41e6674793b21",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Undergoing Analysis",
"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."
}
],
"lastModified": "2026-10-03T11:18:32.067",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}