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CVE-2026-58013 is a buffer over-read vulnerability in GLib in the g_io_channel_read_line_backend() function implemented in giochannel.c. When a custom line terminator longer than one byte is configured, the function can invoke memcmp with bounds that allow reading past the end of the backing GString buffer while checking for the terminator sequence. This results in an out-of-bounds read condition during line-processing operations. The flaw can disclose a small amount of adjacent memory or trigger a crash if the over-read reaches an unmapped page boundary.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced in an Oracle Linux ELSA advisory affecting glib2-related packages; no further technical details are provided in the content.
A specific vulnerability referenced in an AlmaLinux security advisory affecting glib2 packages; no further technical details are provided in the content.
A GLib buffer over-read vulnerability in glib/giochannel.c via g_io_channel_read_line_backend.
A vulnerability referenced in the Oracle Linux advisory for glib2 packages.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.