CVE-2026-46690

Summary: CVE-2026-46690 affects the unbounded-spsc crate (0.2.0 and earlier). The vulnerability originates from an unsafe TRANSMUTE in Sender::send (DISCONNECTED branch) that reinterprets a raw pointer to a Producer as a Consumer, creating a fake Arc and enabling out-of-bounds access. This race w...

unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race

Summary Sender::send in src/lib.rs contains an unsafe block in the DISCONNECTED arm that transmutes a raw pointer mut Producer into the bytes of a value-level Consumer. The author's intent, visible in the surrounding comment at lines 386-390, was a value transmute. The shipped code is one level o...