Red Hat Security Advisory: valkey security update
Two security vulnerabilities have been identified in Valkey, an advanced key-value store used in Red Hat Enterprise Linux 10. 0 Extended Update Support. The first vulnerability (CVE-2025-67733) involves data tampering and denial of service caused by improper handling of null characters in Lua scripts. The second vulnerability (CVE-2026-21863) allows denial of service via invalid clusterbus packets. Red Hat has issued an important security update addressing these issues. The update is available for multiple architectures and versions of Red Hat Enterprise Linux 10. 0. No known exploits in the wild have been reported at this time.
AI Analysis
Technical Summary
Valkey is a high-performance key-value store supporting various data types and atomic operations, with features including Lua scripting and master-slave replication. Two vulnerabilities were fixed: CVE-2025-67733, which allows data tampering and denial of service through improper null character handling in Lua scripts, and CVE-2026-21863, which enables denial of service via malformed clusterbus packets. These issues affect Red Hat Enterprise Linux 10.0 Extended Update Support and related packages. Red Hat has released updated packages to remediate these vulnerabilities as detailed in advisory RHSA-2026:5445.
Potential Impact
The vulnerabilities can lead to data tampering and denial of service conditions in Valkey deployments. Specifically, improper null character handling in Lua scripts can be exploited to alter data or disrupt service, while invalid clusterbus packets can cause denial of service. These impacts affect the integrity and availability of Valkey services on affected Red Hat Enterprise Linux 10.0 systems. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated valkey packages addressing these vulnerabilities. Users of Red Hat Enterprise Linux 10.0 Extended Update Support should apply the security update described in advisory RHSA-2026:5445 promptly. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor advisory.
Red Hat Security Advisory: valkey security update
Description
Two security vulnerabilities have been identified in Valkey, an advanced key-value store used in Red Hat Enterprise Linux 10. 0 Extended Update Support. The first vulnerability (CVE-2025-67733) involves data tampering and denial of service caused by improper handling of null characters in Lua scripts. The second vulnerability (CVE-2026-21863) allows denial of service via invalid clusterbus packets. Red Hat has issued an important security update addressing these issues. The update is available for multiple architectures and versions of Red Hat Enterprise Linux 10. 0. No known exploits in the wild have been reported at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Valkey is a high-performance key-value store supporting various data types and atomic operations, with features including Lua scripting and master-slave replication. Two vulnerabilities were fixed: CVE-2025-67733, which allows data tampering and denial of service through improper null character handling in Lua scripts, and CVE-2026-21863, which enables denial of service via malformed clusterbus packets. These issues affect Red Hat Enterprise Linux 10.0 Extended Update Support and related packages. Red Hat has released updated packages to remediate these vulnerabilities as detailed in advisory RHSA-2026:5445.
Potential Impact
The vulnerabilities can lead to data tampering and denial of service conditions in Valkey deployments. Specifically, improper null character handling in Lua scripts can be exploited to alter data or disrupt service, while invalid clusterbus packets can cause denial of service. These impacts affect the integrity and availability of Valkey services on affected Red Hat Enterprise Linux 10.0 systems. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated valkey packages addressing these vulnerabilities. Users of Red Hat Enterprise Linux 10.0 Extended Update Support should apply the security update described in advisory RHSA-2026:5445 promptly. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:5445
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-21863"]
- Cvss Version
- null
Threat ID: 6a16097be29bf47b5064799d
Added to database: 5/26/2026, 8:58:35 PM
Last enriched: 5/26/2026, 10:21:35 PM
Last updated: 5/27/2026, 5:03:43 AM
Views: 2
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