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CVE-2026-98098

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <b3b76e9f4f2476f1135b2ba7743a821db4a0df4b, 7.2.7, <3.15, <b5344e459996afb45e30fdc407b41e6674793b21, 6.18.53, 0, a5e7ac5ce134d8f72f59631011fafa7bbf7ca174, 6.6.158, <=6.6.*, <246a4b4aace490664927042e93400a6f940d197f, 6.1.189, <6188cf0c989dea60f2efe800eaebb7d0bd16e2b2, <68619f965329d2f7b113a3d5811aa23198f39105, 3.15, <=6.18.*, 5.15.222, <ad805326d874062f8bc72a94884f86046148cde3, <d0d82f1214f321143c5dbc2e48e4a4e6c4226895, <=7.2.*, <=*, <=5.15.*, 6.12.111, 7.3

Description

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: 1. User-space applications subscribing to node or link up/down events stop receiving notifications. 2. A NULL pointer dereference can occur: 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. Fix these issues by allowing protocol service types (node state, link state, and topology server) to be inserted into the name table unconditionally. 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.

Gravité et risque d'exploitation

CVE-2026-98098 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.18 %, ce qui la place devant 7.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <b3b76e9f4f2476f1135b2ba7743a821db4a0df4b, 7.2.7, <3.15, <b5344e459996afb45e30fdc407b41e6674793b21, 6.18.53, 0, a5e7ac5ce134d8f72f59631011fafa7bbf7ca174, 6.6.158, <=6.6.*, <246a4b4aace490664927042e93400a6f940d197f, 6.1.189, <6188cf0c989dea60f2efe800eaebb7d0bd16e2b2, <68619f965329d2f7b113a3d5811aa23198f39105, 3.15, <=6.18.*, 5.15.222, <ad805326d874062f8bc72a94884f86046148cde3, <d0d82f1214f321143c5dbc2e48e4a4e6c4226895, <=7.2.*, <=*, <=5.15.*, 6.12.111, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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