CVE-2026-4438
- Source
- https://cve.org/CVERecord?id=CVE-2026-4438
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-4438.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-4438
- Downstream
- Related
- Published
- 2026-03-20T19:59:06.064Z
- Modified
- 2026-07-01T11:53:20.693263503Z
- 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
- gethostbyaddr and gethostbyaddr_r return invalid DNS hostnames
- 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.
- Database specific
{ "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "2.34" }, { "last_affected": "2.43" } ] } ], "cwe_ids": [ "CWE-20" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4438.json", "cna_assigner": "glibc" }- References
Affected packages
Git / sourceware.org/git/glibc.git
Affected ranges
- Type
- GIT
- Repo
- https://sourceware.org/git/glibc.git
- Events
-
Introducedae37d06c7d127817ba43850f0f898b793d42aea7Last affectedf762ccf84f122d1354f103a151cba8bde797d521
- Database specific
{ "source": "CPE_RANGE", "extracted_events": [ { "introduced": "2.34" }, { "last_affected": "2.43" } ], "cpe": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*" }