CVE-2026-58010
A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses > instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.
CSIRTS triage
- What
- Buffer over-read can occur in gvariant-serialiser.c due to certain function calls.
- Who is affected
- Users of Glib that utilize GVariant serialization.
- Urgency
- This medium severity issue should be addressed to prevent potential data leaks.
- Action
- Update to the latest version of Glib.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
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