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RUSTSEC-2026-0139
No affected components available
Two soundness violations exist in the Rust bindings for MetaCall:
Null-pointer dereference: MetaCallFuture::new_raw() accepts a raw
pointer without validation. The Debug impl calls Box::from_raw(self.data)
on it. Passing a null pointer causes the Debug impl to construct a
NonNull from null, producing undefined behavior.
Double-free: MetaCallPointer::clone() shares the same rust_value raw
pointer between the clone and the original. Calling get_value_untyped() on
both clones calls Box::from_raw on the same pointer twice, resulting in a
double-free.
Both issues can be triggered through safe public APIs —
MetaCallFuture::new_raw(), MetaCallPointer::new(), clone(), and
get_value_untyped() — with no unsafe required from the caller.
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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