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CVE-2026-23272 is a vulnerability in the Linux kernel netfilter nf_tables subsystem. When an nf_tables set is full, the insertion path could publish a new set element and then remove it again without waiting for an RCU grace period, while an RCU reader might already be traversing that element. The issue is tied to element accounting and insertion ordering around set->nelems in the nf_tables set handling logic. The upstream fix changes the behavior to unconditionally bump set->nelems before insertion, always add the element transaction even when the set is full, and toggle a set_full flag so the operation returns -ENFILE and the abort path can safely unwind the set to its previous state. For element updates, set->nelems is decremented to restore the prior count. The vulnerability is therefore a race/concurrency flaw that can expose readers to an element that has been removed before RCU synchronization completes.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
25 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.