CVE-2026-41681
rust-openssl: rustMdCtxRef::digest_final() writes past caller buffer with no length check
9.8
CRITICAL
CVSS 3.1
EPSS 0.06%
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.
How to fix CVE-2026-41681
To remediate CVE-2026-41681, upgrade the affected package to a fixed version below.
- —upgrade to 0.10.78 or later
- —no fix listed
Is CVE-2026-41681 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 0.10.39, < 0.10.78
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 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 |
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |