CVE-2026-0915

getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler

State: Published
Severity: 7.5 High
Published: Jan 15, 2026
Updated: Jan 20, 2026
Reserved: Jan 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-908 Use of Uninitialized Resource

Affected Products

Product	Versions
glibcThe GNU C Library	2.0 through 2.42Affected

References

https://sourceware.org/bugzilla/show_bug.cgi?id=33802
http://www.openwall.com/lists/oss-security/2026/01/16/6

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