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CVE-2026-64189 is a use-after-free vulnerability in the Linux kernel Netfilter ipset subsystem. The ip_set_dump_do() and ip_set_dump_done() paths access the ip_set_list array via ip_set_ref_netlink() without holding the nfnl mutex or an RCU read-side critical section. A concurrent ip_set_create() operation can resize the array, publish its replacement, wait with synchronize_net(), and free the old array. Because the dump paths are not registered as RCU readers, they can continue indexing the freed array. The fix protects the array access with rcu_read_lock(); the referenced ipset remains pinned by its netlink reference count.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the Oracle Linux 9 kernel security update.
A vulnerability referenced in the Oracle Linux 8 kernel-related security advisory; no technical flaw details are provided.
Linux kernel Netfilter ipset race condition between set dumping and ip_set_list resizing.
Linux kernel Netfilter ipset race condition between set dumping and ip_set_list resizing.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.