Is CVE-2026-58013 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-58013?

CVE-2026-58013 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-58013

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.