DEBIAN-CVE-2026-6331

See a problem?
Please try reporting it to the source first.

Source

https://security-tracker.debian.org/tracker/CVE-2026-6331

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6331.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-6331

Upstream

CVE-2026-6331

Published

2026-06-25T22:17:03Z

Modified

2026-09-14T17:03:47Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator

Summary

[none]

Details

HMAC zero-length tag forgery in EVP_DigestVerifyFinal, where a zero-length tag could be accepted as valid during HMAC verification. In the OpenSSL-compatibility HMAC verify path the supplied signature length was only checked as not exceeding the MAC length, so a zero-length or otherwise truncated tag could pass verification. The fix requires the supplied tag length to exactly equal the MAC length and rejects a zero-length MAC, so a forged short or empty tag is no longer accepted.

References

https://security-tracker.debian.org/tracker/CVE-2026-6331

Affected packages

Debian:12 / wolfssl

Package

Name: wolfssl
Purl: pkg:deb/debian/wolfssl?arch=source&distro=bookworm

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

5.5.4-2+deb12u3

Affected versions

5.*

5.5.4-2

5.5.4-2+deb12u1

5.5.4-2+deb12u2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6331.json"

Debian:13 / wolfssl