CVE-2026-21863

HIGH EPSS 30.7%
Published Feb 23, 20264mo ago · Modified Feb 25, 20264mo ago
7.5 CVSS 3.1
High
Find Similar
Published Feb 23, 2026 4mo ago
Last Modified Feb 25, 2026 4mo ago

Description

Valkey is a distributed key-value database. Prior to versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12, a malicious actor with access to the Valkey clusterbus port can send an invalid packet that may cause an out bound read, which might result in the system crashing. The Valkey clusterbus packet processing code does not validate that a clusterbus ping extension packet is located within buffer of the clusterbus packet before attempting to read it. Versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12 fix the issue. As an additional mitigation, don't expose the cluster bus connection directly to end users, and protect the connection with its own network ACLs.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
30.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 4

VendorProductVersionRange
lfprojectsvalkey* <7.2.12
lfprojectsvalkey*≥8.0.0  –  <8.0.7
lfprojectsvalkey*≥8.1.0  –  <8.1.6
lfprojectsvalkey*≥9.0.0  –  <9.0.2

References 1

  • github.com https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggq
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.