rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-ghm9-cr32-g9qj rust-openssl: rustMdCtxRef::digest_final() writes past caller buffer with no length check
Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Fri, 24 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 24 Apr 2026 17:30:00 +0000

Type Values Removed Values Added
Description rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.
Title rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 8.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-24T17:42:54.765Z

Reserved: 2026-04-22T03:53:24.406Z

Link: CVE-2026-41681

cve-icon Vulnrichment

Updated: 2026-04-24T17:42:51.659Z

cve-icon NVD

Status : Received

Published: 2026-04-24T18:16:29.717

Modified: 2026-04-24T18:16:29.717

Link: CVE-2026-41681

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses