redis,valkey -- Lua Use-After-Free may lead to remote code execution

2025-10-04 · CVE-2025-49844 · VuXML entry

redis reports: An authenticated user may 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. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL …

Affected versions

• redis >= 8.2.0 < 8.2.2
• redis80 >= 8.0.0 < 8.0.4
• redis74 >= 7.4.0 < 7.4.6
• redis72 >= 7.2.0 < 7.2.11
• redis62 >= 6.2.0 < 6.2.20
• valkey < 8.1.4

By system

1 still vulnerable, 7 fixed. Where VuXML applies (FreeBSD, DragonFly, FreeBSD's derivatives) a port is vulnerable while its version is in a range; pkgsrc says itself whether it lists a CVE of this advisory; OpenBSD and MidnightBSD keep no list this site reads, so their row is only an estimate: FreeBSD's ranges applied to upstream's version.