CVE-2026-45784
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
Vulnerability in rust-openssl from 0.10.50 to 0.10.80. The `CipherCtxRef::cipher_update_inplace` function incorrectly sizes output buffers for AES key-wrap-with-padding ciphers (`EVP_aes_{128,192,256}_wrap_pad`), causing up to 7 bytes of out-of-bounds write and heap corruption when input length is not a multiple of 8.
Risk Assessment
An attacker controlling plaintext length can cause heap corruption, potentially leading to crashes or code execution.
Recommendation
Update rust-openssl to version 0.10.80 or later. Avoid using AES key-wrap-with-padding ciphers with untrusted data.
Other vulnerabilities in rust-openssl
See all- CVE-2026-42327High
In the rust-openssl library, versions from 0.9.7 to before 0.10.79, there is a vulnerability related to improper processing of OCSP responder URLs from a certificate's AIA extension. The use of invalid bytes in the OCSP accessLocation can lead to a violation of the UTF-8 invariant, resulting in undefined behavior.
- CVE-2026-41898Medium
A vulnerability in the rust-openssl library (versions 0.9.24 through 0.10.78) causes the PSK and cookie callbacks to not validate the user closure's return value against the buffer size. This can lead to buffer overflows and other unintended consequences.
- CVE-2026-41681High
In the rust-openssl library versions 0.10.39 through 0.10.77, there is a buffer overflow vulnerability in the EVP_DigestFinal() function. This function always writes EVP_MD_CTX_size(ctx) bytes to the output buffer, which when the buffer is smaller leads to a write past its end and potential stack corruption. The issue is reachable from safe Rust code.
- CVE-2026-41678High
In the rust-openssl library before version 0.10.78, the aes::unwrap_key() function contains an incorrect assertion: it checks out.len() + 8 <= in_.len() instead of the correct out.len() >= in_.len() - 8. This leads to an out-of-bounds write when a smaller output buffer is provided.
- CVE-2026-41676High
In rust-openssl versions 0.9.27 through 0.10.77, a heap/stack overflow vulnerability exists in Deriver::derive and PkeyCtxRef::derive functions. On OpenSSL 1.1.x, EVP_PKEY_derive ignores the provided buffer size and writes the full shared secret, causing overflow even from safe Rust code.
Original NVD description (English source)
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.50 until 0.10.80, CipherCtxRef::cipher_update_inplace in openssl/src/cipher_ctx.rs incorrectly sized output buffers when used with AES key-wrap-with-padding ciphers EVP_aes_{128,192,256}_wrap_pad. For a non-multiple-of-8 input, OpenSSL writes up to 7 bytes past the end of the caller's buffer or Vec, producing attacker-controllable heap corruption when the plaintext length is attacker-influenced. This issue is fixed in version 0.10.80.