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CVE-2026-52924 is a use-after-free vulnerability in the Linux kernel SCTP implementation. In sctp_sf_do_5_2_6_stale(), receiving a Stale Cookie ERROR rolls an association back from COOKIE_ECHOED to COOKIE_WAIT even though user data may already be queued or bundled with the COOKIE-ECHO chunk. During this rollback, sctp_stream_update() replaces and frees the old stream table without invalidating stream->out_curr. The cached scheduler pointer and queued or retransmittable data can consequently reference freed stream state. Subsequent FCFS, RR, PRIO, and other scheduler dequeue operations can dereference freed memory, causing a kernel crash.
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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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65 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in the Linux kernel's SCTP implementation involving stale COOKIE-ECHO handling. The security fix purges the outgoing queue. Red Hat Enterprise Linux 9 kernel-rt packages are affected; further impact details are not provided.
Listed in a Red Hat kernel-package security advisory; the specific flaw and its impact are not described.
A flaw in Linux kernel SCTP handling of stale COOKIE-ECHO messages. The fix purges the outbound queue during this handling. The advisory does not detail exploitation consequences. A patched kernel is available through RHSA-2026:77216 and requires a reboot.
A Linux kernel SCTP vulnerability involving stale COOKIE-ECHO handling and the outgoing queue. The fix purges the outqueue during this handling; exploitation details are not supplied.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.