CVE-2026-4438
5.4
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| The GNU C Library | glibc | 2.34 <= 2.43 | affected |
Weaknesses
- CWE-20: CWE-20 Improper input validation
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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