Heap-based buffer overflow in Redis - CVE-2026-25243

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Main Vulnerability Database Vulnerabilities #VU130203

Heap-based buffer overflow in Redis - CVE-2026-25243

Published: May 5, 2026


Vulnerability identifier: #VU130203
CSH Severity: Medium
CVSS v4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-25243
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to improper input validation in the RESTORE command when processing a specially crafted serialized payload. A remote user can send a specially crafted serialized payload to execute arbitrary code.

Exploitation requires permission to execute the RESTORE command.


Affected software

Redis
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
Red Hat Enterprise Linux for IBM z Systems
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
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 Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Server Applications Module
openSUSE Leap
openEuler
SecurityCenter
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
redis-debugsource
redis
redis-debuginfo
redis (Red Hat package)
redis-doc
redis-devel
redis7-debuginfo
redis7
redis7-debugsource
valkey
valkey (Red Hat package)
valkey-debuginfo
valkey-compat-redis
valkey-debugsource
valkey-devel

How to mitigate CVE-2026-25243

Install security update from vendor's website.

Redis - addressed in versions 7.2.14, 7.4.9, 8.2.6, 8.4.3, 8.6.3
SecurityCenter - addressed in versions SC202607.1, SC202607.2
redis-debugsource - addressed in versions 6.2.6-150400.3.46.1, 7.2.4-150600.3.24.1
redis - addressed in versions 6.2.6-150400.3.46.1, 7.2.4-150600.3.24.1
redis-debuginfo - addressed in versions 6.2.6-150400.3.46.1, 7.2.4-150600.3.24.1
redis (Red Hat package) - update to 6.2.7-1.el9_4.6
redis-doc - addressed in versions 6.2.22-1.0.1, 7.2.14-1, 8.6.3-1
redis-devel - addressed in versions 6.2.22-1.0.1, 7.2.14-1, 8.6.3-1
redis - addressed in versions 6.2.22-1.0.1, 7.2.14-1, 8.6.3-1
redis7-debuginfo - addressed in versions 7.0.8-150500.3.31.1, 7.0.8-150600.8.25.1
redis7 - addressed in versions 7.0.8-150500.3.31.1, 7.0.8-150600.8.25.1
redis7-debugsource - addressed in versions 7.0.8-150500.3.31.1, 7.0.8-150600.8.25.1
redis-debugsource - update to 7.2.14-1
redis-debuginfo - update to 7.2.14-1
redis - update to 7.2.14-1
valkey - addressed in versions 8.0.9-1.el8, 8.0.9-1.fc42, 8.1.7-1.fc43, 9.0.4-1.fc44
valkey (Red Hat package) - addressed in versions 8.0.9-1.el9_8, 8.0.9-1.el10_0
valkey-debuginfo - addressed in versions 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1
valkey-compat-redis - addressed in versions 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1
valkey-debugsource - addressed in versions 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1
valkey-devel - addressed in versions 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1
valkey - addressed in versions 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1

External References

Related Security Bulletins