CVEvulnerability

CVE-2026-4438

5.4 MEDIUM Published 2026-03-20 Modified 2026-07-14 Official page ↗
Status
Modified
Published
2026-03-20
Last modified
2026-07-14
Assigner
3ff69d7a-14f2-4f67-a097-88dee7810d18
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.4 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-20, CWE-88

Description

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.

Affected configurations

• gnu glibc (>= 2.34 <= 2.43)

Related

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-88 Improper Neutralization of Argument Delimiters in a Command weakness

References