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CVE-2025-23142 is a use-after-free read in the Linux kernel SCTP send path. SCTP can reuse an association transport selected by the socket endpoint and message destination, and assigns that transport to outbound message chunks. A race occurs if another thread removes the selected transport, including by unbinding an address through SCTP socket options, after chunk setup but before transmission. The race window exists when a sender waits for send-buffer capacity and temporarily releases the socket lock. When the association output queue is subsequently flushed, transport selection can dereference freed transport data. The fix restores a transport dead-state flag, retains a transport reference while checking the state after the socket lock is reacquired, and returns EAGAIN when deletion is detected so userspace can retry the send.
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A Linux kernel SCTP use-after-free vulnerability caused by a race condition in sendmsg.
Use-after-free vulnerability in Linux kernel SCTP sendmsg processing caused by a race condition.
A Linux kernel SCTP use-after-free vulnerability caused by a race condition in sendmsg.
A Linux kernel SCTP use-after-free vulnerability caused by a race condition in sendmsg.
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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.
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