CVE-2026-58013
Medium
Description
A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes or a denial of service when the buffer over-read crosses a page boundary.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Gnome Glib
PublishedJun 30, 2026
First seenJun 30, 2026
Weakness typeCWE-126CWE-126
How to fix
Update
- gnome glib2.88.1 or later
Vendor advisories
- gitlab.gnome.org/GNOME/glib/-/issues/3925
- access.redhat.com/errata/RHSA-2026:49512
- access.redhat.com/errata/RHSA-2026:55440
- access.redhat.com/errata/RHSA-2026:57015
- access.redhat.com/errata/RHSA-2026:58981
- access.redhat.com/errata/RHSA-2026:61766
- access.redhat.com/errata/RHSA-2026:61783
- access.redhat.com/errata/RHSA-2026:63135
- access.redhat.com/errata/RHSA-2026:63138
- access.redhat.com/errata/RHSA-2026:63140
- access.redhat.com/errata/RHSA-2026:65762
- access.redhat.com/errata/RHSA-2026:65763
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnome glib | v < 2.88.1 | 2.88.1 |
| redhat enterprise_linux | 6.0, 7.0, 8.0, 9.0, 10.0 | — |
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