Out-of-Bounds Write Vulnerability in rust-openssl Affects OpenSSL Bindings for Rust
CVE-2026-41678

7.2HIGH

Key Information:

Vendor

Rust-OpenSSL

Status
Rust-OpenSSL
Vendor
CVE Published:
24 April 2026

What is CVE-2026-41678?

The rust-openssl project, which provides OpenSSL bindings for the Rust programming language, contains a flaw in the aes::unwrap_key() function up to version 0.10.78. This flaw results from an incorrect assertion that improperly verifies the size of the output buffer. The check should confirm that the output buffer is sufficiently large to accommodate the data being written; however, due to an inverted condition, the function rejects larger buffers. When a smaller buffer is utilized, the function may write beyond its bounds, leading to potential data corruption and security risks. This issue has been addressed in version 0.10.78.

Affected Version(s)

rust-openssl >= 0.10.24, < 0.10.78

References

https://github.com/rust-openssl/rust-openssl/security/adv...
x_refsource_CONFIRM

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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