CVE-2025-49844

NameCVE-2025-49844
DescriptionRedis 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4325-1, DSA-6020-1, DSA-6022-1
Debian Bugs1117553, 1117687, 1117690

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
redict (PTS)forky, sid7.3.6+ds-1fixed
redis (PTS)bullseye5:6.0.16-1+deb11u2vulnerable
bullseye (security)5:6.0.16-1+deb11u8fixed
bookworm5:7.0.15-1~deb12u5vulnerable
bookworm (security)5:7.0.15-1~deb12u6fixed
trixie5:8.0.2-3vulnerable
trixie (security)5:8.0.2-3+deb13u1fixed
forky, sid5:8.0.4-1fixed
valkey (PTS)trixie (security)8.1.1+dfsg1-3+deb13u1fixed
forky, trixie8.1.1+dfsg1-3vulnerable
sid8.1.4+dfsg1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
redictsource(unstable)7.3.6+ds-11117690
redissourcebullseye5:6.0.16-1+deb11u8DLA-4325-1
redissourcebookworm5:7.0.15-1~deb12u6DSA-6020-1
redissourcetrixie5:8.0.2-3+deb13u1DSA-6020-1
redissource(unstable)5:8.0.4-11117553
valkeysourcetrixie8.1.1+dfsg1-3+deb13u1DSA-6022-1
valkeysource(unstable)8.1.4+dfsg1-11117687

Notes

https://www.zerodayinitiative.com/advisories/ZDI-25-933/
https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q
https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539 (8.2.2)
https://github.com/redis/redis/commit/02b16202a30f619628305ed89d3ae7700c280793 (8.0.4)
https://github.com/valkey-io/valkey/commit/6dd003e88feace83e55491f32376f6927896e31e

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