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CVE-2026-58010 is an off-by-one flaw in GLib in the gvs_tuple_is_normal function implemented in glib/gvariant-serialiser.c. During an alignment padding check, the bounds validation uses a strict greater-than comparison instead of a greater-than-or-equal comparison. This logic error permits a one-byte read past the end of the intended buffer. The resulting condition is a limited out-of-bounds read that can disclose a single byte of adjacent memory and may also crash the process if the read crosses into an unmapped page.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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 and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.