BaseFortify

Publication date: 2026-01-15

Last updated on: 2026-01-20

Assigner: GNU C Library

Description

Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.

CVSS Scores

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Meta Information

Published

2026-01-15

Last Modified

2026-01-20

Generated

2026-07-06

AI Q&A

2026-01-16

EPSS Evaluated

2026-07-05

NVD

CVE-2026-0915

Affected Vendors & Products

Vendor	Product	Version / Range
gnu	glibc	From 2.0 (inc) to 2.42 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-908	The product uses or accesses a resource that has not been initialized.

Attack-Flow Graph

Executive Summary

This vulnerability occurs when the functions getnetbyaddr or getnetbyaddr_r are called with a configured nsswitch.conf that uses the DNS backend for networks. If a query is made for a zero-valued network in GNU C Library versions 2.0 to 2.42, it can cause stack contents to be leaked to the DNS resolver.

Impact Analysis

The vulnerability can lead to unintended disclosure of stack memory contents to an external DNS resolver, potentially exposing sensitive information from the process memory.

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