CVE-2026-0915: getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler

Published Jan 15, 2026
·
Updated

Calling getnetbyaddr or getnetbyaddrr 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.

Affected Software

3 affected components
GNU C Library>=2.0<=2.42
GNU glibc>=2.0<=2.42
IBM API Connect V12 OnPrem<=All

Event History

Jan 15, 2026
CVE Published
via MITRE·10:08 PM
Data Sourced
via MITRE·10:08 PM
DescriptionWeakness
Data Sourced
via NVD·10:16 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·11:01 PM
DescriptionSeverityAffected Software
Jul 7, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-0915?

CVE-2026-0915 is categorized as a moderate severity vulnerability due to the potential for leaking sensitive stack information.

2

How do I fix CVE-2026-0915?

To fix CVE-2026-0915, update the GNU C Library to a version newer than 2.42.

3

What systems are affected by CVE-2026-0915?

CVE-2026-0915 affects GNU C Library versions from 2.0 to 2.42, particularly when configured with a DNS backend for network queries.

4

What specific functions are vulnerable in CVE-2026-0915?

The functions getnetbyaddr and getnetbyaddr_r are specifically vulnerable in CVE-2026-0915.

5

Can CVE-2026-0915 lead to sensitive data exposure?

Yes, CVE-2026-0915 can lead to sensitive data exposure by leaking stack contents to the DNS resolver.

Company

Resources

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