🟡 Medium | Source: Microsoft Security Response Center
CVE-2026-58013 is a buffer over-read vulnerability in GLib’s I/O channel handling, specifically within the g_io_channel_read_line_backend function in giochannel.c. A buffer over-read occurs when a programme reads beyond the intended memory boundary, potentially exposing sensitive data from adjacent memory. This vulnerability is relevant to Azure environments where GLib is used as a dependency in Linux-based workloads or services.
Security Architect’s Take: Identify any Azure-hosted Linux workloads, containers, or services that depend on GLib and prioritise patching to the remediated version once available. Review your software composition analysis (SCA) tooling to ensure GLib is tracked as a dependency across your estate.
Original advisory: CVE-2026-58013 Glib: buffer over-read in glib/giochannel.c via “g_io_channel_read_line_backend”