Use-After-Free Vulnerability in Redis with TLS Support

CVE-2026-81934

What is CVE-2026-81934?

CVE-2026-81934 is a serious vulnerability affecting Redis, an in-memory data structure store commonly used as a database, cache, and message broker. Specifically, this issue arises from a use-after-free flaw within the tlsProcessPendingData() function when Redis is configured with TLS support. This vulnerability permits a remote, unauthenticated attacker to execute arbitrary commands on the Redis server with the same privileges as the server itself. Consequently, compromised systems could experience unauthorized data access, data manipulation, or overall service disruption, which poses significant risks to organizations that rely on Redis for critical operations.

Potential Impact of CVE-2026-81934

1. Unauthorized Access and Control: Attackers exploiting this vulnerability can gain access to sensitive data stored within Redis, potentially leading to further exploitation, data theft, or unauthorized changes to data.

2. Service Disruption: The ability to execute arbitrary commands can compromise the availability of the Redis service, leading to disruptions in applications that depend on Redis for real-time data processing and caching.

3. Compromise of System Integrity: With access to the Redis server's privileges, attackers can manipulate or corrupt data, impacting the integrity of applications, and potentially allowing for further intrusions into the broader networked environment.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

This is an advertDeploy the Patch →

References