CVE-2026-41677
CRITICAL9.1EPSS 0.16%rust-opennssl has an Out-of-bounds read in PEM password callback when returning an oversized length
Published: 4/22/2026Modified: 5/5/2026
Description
The `*_from_pem_callback` APIs did not validate the length returned by the user's callback. A password callback that returns a value larger than the buffer it was given can cause some versions of OpenSSL to over-read this buffer. OpenSSL 3.x is not affected by this.
Affected packages (2)
- crates.io/openssl>= 0.9.0, < 0.10.78
- Debian/rust-opensslfrom 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U |
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
References (7)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-41677
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-41677
- PATCHhttps://github.com/rust-openssl/rust-openssl
- WEBhttps://github.com/rust-openssl/rust-openssl/commit/5af6895c907773699f37f583f409b862284062b1
- WEBhttps://github.com/rust-openssl/rust-openssl/pull/2605
- WEBhttps://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78
- WEBhttps://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-xmgf-hq76-4vx2