What is CVE-2026-0915?

CVE-2026-0915 is a high-severity vulnerability in GNU Glibc, classified under Use of Uninitialized Resource. CVSS score: 7.5/10. Published 2026-01-15.

How severe is CVE-2026-0915?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2026-0915 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in GNU Glibc

CVE-2026-0915

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.

Published 2026-01-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.001

Affected products

GNU Glibc
The GNU C Library Glibc — versions 2.0

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

Public proof-of-concept exploits

References

3ff69d7a-14f2-4f67-a097-88dee7810d18 (Broken Link)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List)

Frequently asked questions

What is CVE-2026-0915?: CVE-2026-0915 is a high-severity vulnerability in GNU Glibc, classified under Use of Uninitialized Resource. CVSS score: 7.5/10. Published 2026-01-15.
How severe is CVE-2026-0915?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2026-0915 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.