Resource management error in Redis - CVE-2025-21605

Vulnerability identifier: #VU107885

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2025-21605

CWE-ID: CWE-399

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
Redis
Valkey
Gentoo Linux
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Enterprise Storage
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Anolis OS
Fedora
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Server Applications Module
openSUSE Leap
openEuler
EasyApache
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
redis-debuginfo
redis
redis-debugsource
redis (Red Hat package)
redis6-doc
redis6-devel
redis6-debugsource
redis6-debuginfo
redis6
redis-doc
redis-devel
redis7-debuginfo
redis7-debugsource
redis7
dev-db/redict
valkey-devel
valkey
valkey-debuginfo
valkey-compat-redis
valkey-debugsource
dev-db/redis
Juniper Junos Space

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application when handling output buffers. A remote attacker can cause the output buffer to grow from "NOAUTH" responses until the system will run out of memory.

Install updates from vendor's website.

• https://github.com/redis/redis/security/advisories/GHSA-r67f-p999-2gff