Heimdall Security Logo

CVE-2026-98402

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, 7.2.7, 6.10, 6.1.130, 6.18.53, 0, <6.10, <99654b651c6d5fe865798a2adb859767905f9278, 6.6.158, <=6.6.*, 6.1.189, <7fcc2fe39fed1cb98a7374a113ff3800e8f9af80, <6.6.158, <ec6d4612d1c170e1cef1fe55526471da1e81e777, <=6.18.*, 524c341cb16a8d5318d2ffacf6fe160271a18743, <=7.2.*, <6.1.189, <b972b5e6168dc5d1e13297b1f37f71d6b21cc0f1, <=*, 21b28f97e621cba196fb32c576734d216a8a79c9, <04c0d35bac5122b533672a6775851dfae84e265e, 6.6.81, <2b32f8c3560905582fb12ed68315a6e606367a6a, db3efdcf70c752e8a8deb16071d8e693c3ef8746, 6.12.111, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: net: icmp: avoid invalid transport header access in icmp_send tracepoint syzbot reported a WARNING triggered by DEBUG_NET_WARN_ON_ONCE(): WARNING: at skb_transport_header include/linux/skbuff.h:3087 [inline] WARNING: at udp_hdr include/linux/udp.h:23 [inline] WARNING: at do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline] WARNING: at trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11 Call trace: skb_transport_header include/linux/skbuff.h:3087 [inline] udp_hdr include/linux/udp.h:23 [inline] do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline] trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11 __traceiter_icmp_send include/trace/events/icmp.h:11 [inline] __do_trace_icmp_send include/trace/events/icmp.h:11 [inline] trace_icmp_send+0x320/0x49c include/trace/events/icmp.h:11 __icmp_send+0xcfc/0x11d8 net/ipv4/icmp.c:1013 ipv4_send_dest_unreach net/ipv4/route.c:1280 [inline] ipv4_link_failure+0x57c/0x8dc net/ipv4/route.c:1287 dst_link_failure include/net/dst.h:438 [inline] vti_tunnel_xmit+0xe40/0x17a4 net/ipv4/ip_vti.c:307 TP_fast_assign() unconditionally calls udp_hdr(skb) before checking whether the packet is UDP. Furthermore, __icmp_send() can be invoked from paths (e.g., link failures, ARP errors, forwarding, AF_PACKET) where skb->transport_header was never initialized (~0U). Under CONFIG_DEBUG_NET=y, calling skb_transport_header(skb) triggers DEBUG_NET_WARN_ON_ONCE(!skb_transport_header_was_set(skb)). Fix this by: 1. Only parsing transport info when iph->protocol == IPPROTO_UDP. 2. Using skb_header_pointer() at skb_network_offset(skb) + (iph->ihl << 2) to safely fetch the UDP header without assuming transport_header is set.

Gravité et risque d'exploitation

CVE-2026-98402 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 0.21 %, ce qui la place devant 11.2 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, 7.2.7, 6.10, 6.1.130, 6.18.53, 0, <6.10, <99654b651c6d5fe865798a2adb859767905f9278, 6.6.158, <=6.6.*, 6.1.189, <7fcc2fe39fed1cb98a7374a113ff3800e8f9af80, <6.6.158, <ec6d4612d1c170e1cef1fe55526471da1e81e777, <=6.18.*, 524c341cb16a8d5318d2ffacf6fe160271a18743, <=7.2.*, <6.1.189, <b972b5e6168dc5d1e13297b1f37f71d6b21cc0f1, <=*, 21b28f97e621cba196fb32c576734d216a8a79c9, <04c0d35bac5122b533672a6775851dfae84e265e, 6.6.81, <2b32f8c3560905582fb12ed68315a6e606367a6a, db3efdcf70c752e8a8deb16071d8e693c3ef8746, 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

Rechercher une autre CVE