CVE-2026-41681

CRITICAL9.8EPSS 0.06%

rust-openssl: rustMdCtxRef::digest_final() writes past caller buffer with no length check

Published: 4/22/2026Modified: 5/5/2026
Also known as:GHSA-ghm9-cr32-g9qjCGA-g63c-g32c-78mhDEBIAN-CVE-2026-41681

Description

`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.

Affected packages (2)

CVSS scores

SourceVersionSeverityVector
osvCVSS 4.0—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
osvCVSS 3.1CRITICAL9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (7)