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CVE-2026-53214

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : 6.9, <=7.0.*, <=6.12.*, 6.12.94, 5eb902b8e7193cdcb33242af0a56502e6b5206e9, <6.6.143, 0, 6.6.120, <5f82b02b4059ddc06e4fcfd057bfb59fd6885cd2, <=6.6.*, 7.0.13, <b70c687b7cf267fb08586667a3946c8851cad672, 6.18.36, 7.1, <=6.18.*, <192df376a05c2db15564640f9da7e20907c1fa24, <=*, bd12abe294c7738421bdfbc486f1909d02db30e9, <6.9, 6.6.143, <07d9a0870a178843cea44cfd58c27445dc94cf5f, <653a2849305708f75260b5296f17b2a759ff9cc7

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix a potential NPD in cleanup_prefix_route() addrconf_get_prefix_route() can return the fib6_null_entry sentinel entry which has a NULL fib6_table pointer. Therefore, before setting the route's expiration time, check that we are not working with this entry, as otherwise a NPD will be triggered [1]. Note that the other callers of addrconf_get_prefix_route() are not susceptible to this bug: 1. addrconf_prefix_rcv(): Requests a route with the 'RTF_ADDRCONF | RTF_PREFIX_RT' flags which are not set on fib6_null_entry. 2. modify_prefix_route(): Fixed by commit a747e02430df ("ipv6: avoid possible NULL deref in modify_prefix_route()"). 3. __ipv6_ifa_notify(): Calls ip6_del_rt() which specifically checks for fib6_null_entry and returns an error. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [...] Call Trace: <TASK> __kasan_check_byte (mm/kasan/common.c:573) lock_acquire.part.0 (kernel/locking/lockdep.c:5842 (discriminator 1)) _raw_spin_lock_bh (kernel/locking/spinlock.c:182 (discriminator 1)) cleanup_prefix_route (net/ipv6/addrconf.c:1280) ipv6_del_addr (net/ipv6/addrconf.c:1342) inet6_addr_del.isra.0 (net/ipv6/addrconf.c:3119) inet6_rtm_deladdr (net/ipv6/addrconf.c:4812) rtnetlink_rcv_msg (net/core/rtnetlink.c:6997) netlink_rcv_skb (net/netlink/af_netlink.c:2555) netlink_unicast (net/netlink/af_netlink.c:1344) netlink_sendmsg (net/netlink/af_netlink.c:1899) __sock_sendmsg (net/socket.c:802 (discriminator 4)) ____sys_sendmsg (net/socket.c:2698) ___sys_sendmsg (net/socket.c:2752) __sys_sendmsg (net/socket.c:2784) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)

Gravité et risque d'exploitation

CVE-2026-53214 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 0.12 %, ce qui la place devant 1.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.9, <=7.0.*, <=6.12.*, 6.12.94, 5eb902b8e7193cdcb33242af0a56502e6b5206e9, <6.6.143, 0, 6.6.120, <5f82b02b4059ddc06e4fcfd057bfb59fd6885cd2, <=6.6.*, 7.0.13, <b70c687b7cf267fb08586667a3946c8851cad672, 6.18.36, 7.1, <=6.18.*, <192df376a05c2db15564640f9da7e20907c1fa24, <=*, bd12abe294c7738421bdfbc486f1909d02db30e9, <6.9, 6.6.143, <07d9a0870a178843cea44cfd58c27445dc94cf5f, <653a2849305708f75260b5296f17b2a759ff9cc7) 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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