Use After Free Affecting redis/redis package, versions [,8.2.2)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-REDISREDIS-13332699
- published6 Oct 2025
- disclosed3 Oct 2025
- creditBenny Isaacs, Nir Brakha, Sagi Tzadik
Introduced: 3 Oct 2025
NewCVE-2025-49844 (opens in a new tab)How to fix?
Upgrade redis/redis to version 8.2.2 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free. An attacker can gain control over freed memory and execute arbitrary code within the server process by submitting specially crafted scripts via standard commands. This can compromise all in-memory data, session tokens, and application state.
Note:
This is only exploitable if the attacker is authenticated and has permission to execute Lua scripts.
Workaround
This vulnerability can be mitigated by restricting or disabling Lua scripting using ACLs to block EVAL and EVALSHA commands, limiting access to trusted hosts, enforcing strong authentication, and following Redis hardening guidance.