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CVE-2024-36905 is a divide-by-zero flaw in the Linux kernel TCP stack. A socket involved in a simultaneous-open (cross-SYN) connection can enter TCP_SYN_RECV. Calling shutdown(SEND_SHUTDOWN) while in that state previously transitioned it directly to TCP_FIN_WAIT1 without invoking tcp_init_transfer() and tcp_init_buffer_space(). A subsequent receive operation can reach tcp_rcv_space_adjust() with uninitialized buffer-space state and divide by zero. The fix defers the shutdown transition: it records the shutdown request while the socket remains in TCP_SYN_RECV, then transitions to TCP_FIN_WAIT1 and sends FIN only after tcp_rcv_state_process() establishes the socket. The associated FIN-send path was also made safe for bottom-half context through atomic allocation behavior.
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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.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A flaw in Linux kernel TCP shutdown processing for sockets in TCP_SYN_RECV state.
A CVE referenced by the OpenShift Container Platform 4.17.19 advisory; the content provides no vulnerability-specific description.
A resolved Linux kernel TCP flaw concerning deferred SEND_SHUTDOWN handling for sockets in the TCP_SYN_RECV state.
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.