CVE-2026-43084
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
W jądrze systemu Linux zidentyfikowano podatność w module netfilter, która dotyczy współdzielenia globalnej tablicy haszującej między wszystkimi kolejkami. Może to prowadzić do awarii systemu z powodu błędu 'use-after-free'.
Risk Assessment
Podatność ta może prowadzić do niestabilności systemu, co w konsekwencji może wpłynąć na dostępność usług w organizacji. W przypadku wykorzystania tej luki, atakujący może spowodować awarię systemu.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, w której ta podatność została załatana. Należy również monitorować systemy pod kątem nieautoryzowanych zmian i awarii.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

