EUVD-2026-23977CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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6DescriptionNVD
The obsolete nis_local_principal function in the GNU C Library version 2.43 and older may overflow a buffer in the data section, which could allow an attacker to spoof a crafted response to a UDP request generated by this function and overwrite neighboring static data in the requesting application.
NIS support is obsolete and has been deprecated in the GNU C Library since version 2.26 and is only maintained for legacy usage. Applications should port away from NIS to more modern identity and access management services.
AnalysisAI
Buffer overflow in glibc's obsolete NIS authentication function allows remote attackers to compromise integrity and availability via spoofed UDP responses. Affects all glibc versions through 2.43, but exploitation requires the target application to actively use the deprecated nis_local_principal function (obsolete since glibc 2.26). …
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RemediationAI
Within 24 hours: Inventory all systems running glibc versions through 2.43 and identify any applications explicitly calling the nis_local_principal function or actively configured for NIS authentication. Within 7 days: For systems identified as using NIS, implement network segmentation to restrict UDP traffic from untrusted sources to affected systems. …
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