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RUSTSEC-2026-0475
opensslMdCtxRef::digest_final passed the caller's output slice to OpenSSL's EVP_DigestFinal without checking its length. EVP_DigestFinal always writes the full digest (EVP_MD_CTX_size bytes), so an output slice shorter than the digest is overrun. With a stack buffer this usually corrupts the stack. The overflow is reachable from safe code.
MdCtxRef was added in 0.10.39. 0.10.78 checks the slice length first and returns an error when the slice is too short for the digest.
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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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