DEBIAN-CVE-2026-4438

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Source
https://security-tracker.debian.org/tracker/CVE-2026-4438
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4438.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-4438
Upstream
  • CVE-2026-4438
Published
2026-03-20T20:16:49.623Z
Modified
2026-05-27T03:00:07.967052778Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C library version 2.34 to version 2.43 could result in an invalid DNS hostname being returned to the caller in violation of the DNS specification.

References

Affected packages

Debian:12 / glibc

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.36-9+deb12u14

Affected versions

2.*
2.36-9
2.36-9+deb12u1
2.36-9+deb12u2
2.36-9+deb12u3
2.36-9+deb12u4
2.36-9+deb12u5
2.36-9+deb12u6
2.36-9+deb12u7
2.36-9+deb12u8
2.36-9+deb12u9
2.36-9+deb12u10
2.36-9+deb12u11
2.36-9+deb12u12
2.36-9+deb12u13

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4438.json"

Debian:13 / glibc

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.41-12+deb13u3

Affected versions

2.*
2.41-12
2.41-12+deb13u1
2.41-12+deb13u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4438.json"

Debian:14 / glibc

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.42-14

Affected versions

2.*
2.41-12
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4438.json"