CVE-2025-49844

Description

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.

Why is this CVE high priority?

This CVE is likely easy to exploit in the default configuration

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
redict	25.10 questing	Fixed 7.3.5+ds-1ubuntu0.1
	25.04 plucky	Fixed 7.3.2+ds-1ubuntu0.1
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
redis	25.10 questing	Fixed 5:8.0.2-3ubuntu0.25.10.1
	25.04 plucky	Fixed 5:7.0.15-3ubuntu0.1
	24.04 LTS noble	Fixed 5:7.0.15-1ubuntu0.24.04.2
	22.04 LTS jammy	Fixed 5:6.0.16-1ubuntu1.1
	20.04 LTS focal	Fixed 5:5.0.7-2ubuntu0.1+esm4
	18.04 LTS bionic	Fixed 5:4.0.9-1ubuntu0.2+esm6
	16.04 LTS xenial	Fixed 2:3.0.6-1ubuntu0.4+esm4
	14.04 LTS trusty	Fixed 2:2.8.4-2ubuntu0.2+esm5
valkey	25.10 questing	Vulnerable
	25.04 plucky	Vulnerable
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Not in release

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Severity score breakdown

Parameter	Value
Base score	9.9 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7824-1
Redis vulnerability
15 October 2025

USN-7824-2
Redict vulnerability
16 October 2025

USN-7824-3
Redis vulnerability
16 October 2025