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CVE-2024-44935 is a race condition in the Linux kernel SCTP implementation's reuseport handling. SCTP did not synchronize reuseport group allocation, socket addition, and socket detachment for sockets in the same SO_REUSEPORT group. During a concurrent listener creation and close sequence, reuseport_add_sock() can access a peer socket's sk_reuseport_cb after reuseport_detach_sock() has cleared it, causing a null-pointer dereference. Concurrent listen operations can also create duplicate reuseport groups; only one group receives traffic while the others become inactive. The fix applies hash-bucket locking to SCTP endpoint hash and unhash operations, consistent with TCP and UDP synchronization.
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A null-pointer dereference in the Linux kernel SCTP reuseport_add_sock() path.
Linux kernel SCTP NULL-pointer dereference in reuseport socket handling.
Linux kernel SCTP NULL-pointer dereference in reuseport socket handling.
Linux kernel SCTP NULL-pointer dereference in reuseport_add_sock.
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Cross-references every affected SKU, including bundled OEM variants.
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