VDB
DEBIAN-CVE-2026-4437
DEBIAN-CVE-2026-4437
PUBLISHED
CVSS 7.5 HIGH
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, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | glibc | 2.38-1, 2.33-6, 2.34-4 |
| Debian:14 | glibc | 2.42-1, 2.42-10, 2.42-11 |
| Debian:12 | glibc | 2.42-15~hurd.1, 2.42-2, 2.42-3 |
| Debian:13 | glibc | 2.41-12+deb13u1, 2.41-13~hurd.0, 2.41-13~hurd.1 |
Exploit Intelligence
- dockerscan.yml (github-poc)
- sec-build.yaml (github-poc)
- sec-deb.yaml (github-poc)
Timeline
- Mar 20, 2026 CVE Published
- May 16, 2026 CVE Updated