Redis up to 8.6.2 heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Redis up to 8.6.2. This affects an unknown function. Performing a manipulation results in heap-based overflow. This vulnerability is known as CVE-2026-25243. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Redis up to 8.6.2. This affects an unknown functionality. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code execution. A workaround is to restrict access to the RESTORE command with ACL rules. This is patched in version 8.6.3.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-25243 since 01/30/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 315122 (Fedora 42 : valkey (2026-114b1e5d3a)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.6.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the databases at Tenable (315122) and CERT Bund (WID-SEC-2026-1370). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • Fedora Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Microsoft Azure Linux
  • Open Source Redis

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 315122
Nessus Name: Fedora 42 : valkey (2026-114b1e5d3a)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Redis 8.6.3

Timelineinfo

01/30/2026 CVE reserved
05/05/2026 +94 days Advisory disclosed
05/05/2026 +0 days VulDB entry created
07/02/2026 +58 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-c8h9-259x-jff4
Status: Confirmed

CVE: CVE-2026-25243 (🔒)
GCVE (CVE): GCVE-0-2026-25243
GCVE (VulDB): GCVE-100-361215
CERT Bund: WID-SEC-2026-1370 - Redis: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode

Entryinfo

Created: 05/05/2026 19:42
Updated: 07/02/2026 09:47
Changes: 05/05/2026 19:42 (68), 05/18/2026 08:24 (2), 06/15/2026 13:50 (7), 06/26/2026 03:40 (1), 07/02/2026 09:47 (11)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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