Buffer Over-read Vulnerability in GLib Product by GNOME
CVE-2026-58013

6.5MEDIUM

Key Information:

Vendor

Gnome
Status
Glib
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
30 June 2026

What is CVE-2026-58013?

A buffer over-read vulnerability exists in the GLib library where a custom line terminator longer than one character can cause the function g_io_channel_read_line_backend() to read beyond the intended buffer size. This flaw manifests within the giochannel.c file and can lead to unexpected behavior such as minor information disclosure or denial of service if the over-read spans across memory page boundaries.

Affected Version(s)

GLib 0 < 2.88.1

References

https://access.redhat.com/security/cve/CVE-2026-58013
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2492248
issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/glib/-/issues/3925

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank linhlhq for reporting this issue.
.