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CVE-2026-58010

38
FAUCET Score

A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses > instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.

First published: Jun 30, 2026Last modified: Jun 30, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 2.86.5CPE matchmatch criteria
cpe:2.3:a:gnome:glib:*:*:*:*:*:*:*:*
2.88.0CPE matchmatch criteria
cpe:2.3:a:gnome:glib:2.88.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 8th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: azl3 glib 2.78.6-9 on Azure Linux 3.0Fixed in: 2.78.6-10
microsoftpatch availablevia msrc
Product: 21513-17084Fixed in: 2.78.6-10

Vendor Advisories (1)

microsoft2026-Jun/CVE-2026-58010Moderate

Glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal()

Jun 9, 2026

References

access.redhat.com / security/cve/CVE-2026-58010
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
gitlab.gnome.org / GNOME/glib/-/issues/3915
ExploitIssue TrackingVendor Advisory