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CVE-2026-53366 is a heap out-of-bounds write in the Linux kernel IPv4 UDP corking path, in __ip_append_data(). On the paged-allocation path used with MSG_SPLICE_PAGES, fraggap is included in datalen but omitted from alloclen. The kernel consequently allocates an undersized linear area while overstating pagedlen. When a corked datagram crosses a fragment boundary, fraggap bytes copied into the new skb linear area can overwrite adjacent skb_shared_info memory. The correction accounts for fraggap in alloclen and removes it from pagedlen.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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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.
An unspecified Linux kernel vulnerability addressed for Red Hat Enterprise Linux 9.
Referenced in the advisory CVE list, but no vulnerability details are provided in the content.
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.