rust-openssl up to 0.10.77 aes::unwrap_key out-of-bounds write

Summaryinfo

A vulnerability, which was classified as critical, has been found in rust-openssl up to 0.10.77. This affects the function aes::unwrap_key. Performing a manipulation results in out-of-bounds write. This vulnerability was named CVE-2026-41678. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in rust-openssl up to 0.10.77. It has been classified as critical. This affects the function aes::unwrap_key. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-41678 since 04/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 310522 (Linux Distros Unpatched Vulnerability : CVE-2026-41678), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.10.78 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (310522) and CERT Bund (WID-SEC-2026-1657). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Oracle Linux

Productinfo

Type

• Network Encryption Software

Name

• rust-openssl

Version

• 0.10.0
• 0.10.1
• 0.10.2
• 0.10.3
• 0.10.4
• 0.10.5
• 0.10.6
• 0.10.7
• 0.10.8
• 0.10.9
• 0.10.10
• 0.10.11
• 0.10.12
• 0.10.13
• 0.10.14
• 0.10.15
• 0.10.16
• 0.10.17
• 0.10.18
• 0.10.19
• 0.10.20
• 0.10.21
• 0.10.22
• 0.10.23
• 0.10.24
• 0.10.25
• 0.10.26
• 0.10.27
• 0.10.28
• 0.10.29
• 0.10.30
• 0.10.31
• 0.10.32
• 0.10.33
• 0.10.34
• 0.10.35
• 0.10.36
• 0.10.37
• 0.10.38
• 0.10.39
• 0.10.40
• 0.10.41
• 0.10.42
• 0.10.43
• 0.10.44
• 0.10.45
• 0.10.46
• 0.10.47
• 0.10.48
• 0.10.49
• 0.10.50
• 0.10.51
• 0.10.52
• 0.10.53
• 0.10.54
• 0.10.55
• 0.10.56
• 0.10.57
• 0.10.58
• 0.10.59
• 0.10.60
• 0.10.61
• 0.10.62
• 0.10.63
• 0.10.64
• 0.10.65
• 0.10.66
• 0.10.67
• 0.10.68
• 0.10.69
• 0.10.70
• 0.10.71
• 0.10.72
• 0.10.73
• 0.10.74
• 0.10.75
• 0.10.76
• 0.10.77

Support

• end of life (old version)

Website

• Product: https://github.com/rust-openssl/rust-openssl/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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