Medium [CVE-2026-58013] Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"
This medium-severity Red Hat Linux advisory covers CVE-2026-58013 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6.
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Summary
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 named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 1 more.
Affected products named by the advisory: Red Hat Enterprise Linux 9.
- GLib before 2.88.1
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 2.88.1. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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