CVE-2026-4438

MEDIUM

5.4

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.

Details CVE

Score CVSS v3.15.4

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Vecteur d'attaqueADJACENT_NETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/20/2026

Derniere modification4/7/2026

Sourcenvd

Observations honeypot0

Produits affectes

gnu:glibc

Faiblesses (CWE)

CWE-20CWE-88

References

https://sourceware.org/bugzilla/show_bug.cgi?id=34015(3ff69d7a-14f2-4f67-a097-88dee7810d18)

Correlations IOC

Aucune correlation enregistree

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