CVE-2026-4438

gethostbyaddr and gethostbyaddr_r return invalid DNS hostnames

MEDIUM 5.4

En bref

Source
NVD
EPSS
EPSS 0.33 % · centile 26 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
glibc
Statut NVD
Modified

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.

Faiblesses (CWE)

  • CWE-20 — Validation d'entrée incorrecte
  • CWE-88 — Injection d'argument

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.4CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NCISA-ADP
CVSS 3.1MEDIUM 5.4CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
The GNU C Library · glibcaffected 2.34 ≤ 2.43

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD