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CVE-2026-52924 is a use-after-free vulnerability in the Linux kernel SCTP implementation's stale COOKIE-ECHO handling. When receipt of a Stale Cookie ERROR rolls an association from COOKIE_ECHOED back to COOKIE_WAIT, sctp_stream_update() replaces and frees the prior stream table without invalidating the outbound scheduler cache, stream->out_curr. If user data was already queued or bundled with the COOKIE-ECHO, queued and retransmission state can also retain references to the obsolete stream state. Subsequent SCTP scheduler dequeue operations, including FCFS, round-robin, and priority scheduling paths, may dereference the freed stream entry.
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18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel SCTP use-after-free vulnerability in stale COOKIE-ECHO error handling. A stale cached outbound-stream scheduler pointer and queued/retransmittable data can reference freed stream state after association rollback, causing kernel crashes during SCTP dequeue processing.
A Linux kernel SCTP flaw involving purging the output queue during stale COOKIE-ECHO handling, fixed in Red Hat Enterprise Linux 8 kernel-rt packages.
A vulnerability addressed by Ubuntu Security Notice USN-8660-1.
A Linux kernel vulnerability addressed for Red Hat Enterprise Linux 9 kernel packages; the content provides no CVE-specific technical details.
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.