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RUSTSEC-2026-0463
opensslopenssl::aes::unwrap_key guarded the size of its output buffer with an inverted assertion, out.len() + 8 <= in_.len(). Instead of rejecting an out buffer too small for the unwrapped key, it rejected buffers larger than needed and accepted buffers that were too small.
When out is shorter than in_.len() - 8 bytes, the underlying AES_unwrap_key call writes past the end of out. This out-of-bounds write is reachable from a safe function; applications that let untrusted input influence the input or output buffer sizes are exposed.
The function was added in 0.10.24. 0.10.78 corrects the assertion, so an output buffer that is too small now causes a panic before anything is written.
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Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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