CVE-2026-58013: Gnome Glib

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Gnome Glib: before 2.88.1 (fixed in 2.88.1)
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only

Published 2026-06-30. Last modified 2026-10-06.