DEBIAN-CVE-2026-42012

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Source
https://security-tracker.debian.org/tracker/CVE-2026-42012
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42012.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-42012
Upstream
  • CVE-2026-42012
Published
2026-05-26T22:16:41Z
Modified
2026-09-14T17:03:36Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N CVSS Calculator
Summary
[none]
Details

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.

References

Affected packages

Debian:12 / gnutls28

Package

Name
gnutls28
Purl
pkg:deb/debian/gnutls28?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.7.9-2+deb12u7

Affected versions

3.*
3.7.9-2
3.7.9-2+deb12u1
3.7.9-2+deb12u2
3.7.9-2+deb12u3
3.7.9-2+deb12u4
3.7.9-2+deb12u5
3.7.9-2+deb12u6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42012.json"

Debian:13 / gnutls28

Package

Name
gnutls28
Purl
pkg:deb/debian/gnutls28?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.8.9-3+deb13u4

Affected versions

3.*
3.8.9-3
3.8.9-3+deb13u1
3.8.9-3+deb13u2
3.8.9-3+deb13u3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42012.json"

Debian:14 / gnutls28

Package

Name
gnutls28
Purl
pkg:deb/debian/gnutls28?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.8.13-1

Affected versions

3.*
3.8.9-3
3.8.10-1
3.8.10-2
3.8.10-3
3.8.11-1
3.8.11-2
3.8.11-3
3.8.12-1
3.8.12-2
3.8.12-3
3.8.12-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42012.json"