What’s Vulnerable › Vulnerabilities
CVE-2026-41678: rust-openssl: Incorrect bounds assertion in aes key wrap
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-24 · updated 2026-07-17
- Weakness: CWE-787
Description
rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 <= in_.len(), but this condition is reversed. The intended invariant is out.len() >= in_.len() - 8, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function. This vulnerability is fixed in 0.10.78.
Affected products
- rust-openssl: from 0.10.24 before 0.10.78 — fixed in 0.10.78
How to fix
Upgrade to a fixed version: rust-openssl 0.10.78. Check the vendor advisory for mitigations.
References
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