Use After Free The advisory has been revoked - it doesn't affect any version of package redis (opens in a new tab)
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-UBUNTU2004-REDIS-13350734
- published8 Oct 2025
- disclosed3 Oct 2025
Introduced: 3 Oct 2025
CVE-2025-49844 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream redis package and not the redis package as distributed by Ubuntu.
Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2025-49844
- https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539
- https://github.com/redis/redis/releases/tag/8.2.2
- https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q
- http://www.openwall.com/lists/oss-security/2025/10/07/2
- https://github.com/lastvocher/redis-CVE-2025-49844
- https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2025/CVE-2025-49844.yaml