7.5

CVE-2026-0915: gnu glibc Use of Uninitialized Resource

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-0915DEBIAN-CVE-2026-0915CGA-9f7x-88h6-rvv4
Published 15-01-2026Last modified 20-01-2026
Open JSON

Vulnerability summary

CVE-2026-0915 is a high (CVSS 7.5) Use of Uninitialized Resource vulnerability in gnu glibc. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.62%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 15 · Related 12
MGASA-2026-0022OPENSUSE-SU-2026:10662-1OPENSUSE-SU-2026:20133-1RHSA-2026:1334RHSA-2026:2786RHSA-2026:4772

Timeline

  1. 15-01-2026
    PublishedVulnerability first disclosed.
  2. 20-01-2026
    Last modifiedVulnerability information updated.

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 metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

-0.01 pp

From 0.63% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.62%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • eglibcAll versions (No fix recorded)
  • glibc< 2.23-0ubuntu11.3+esm9 | < 2.27-3ubuntu1.6+esm6 | < 2.31-0ubuntu9.18+esm1 | < 2.35-0ubuntu3.13 | < 2.39-0ubuntu8.7 | < 2.42-0ubuntu3.1 | < 2.42-2ubuntu5
Chainguard1 product
  • glibc< 2.42-r6
Debian1 product
  • glibc< 2.36-9+deb12u14 | < 2.41-12+deb13u2 | < 2.42-8
Gnu1 product
The gnu c library1 product
Wolfi1 product
  • glibc< 2.42-r6

6 vendors · 7 products

References

9 links