CVE-2026-82677 valkey-io CVE debrief

Who should care

Users of valkey-io valkey 9.1.0 should review and apply the patch for double free vulnerability. System administrators and security teams responsible for valkey-io valkey deployments should prioritize this update to prevent potential remote attacks. Additionally, operators and platform managers should be aware of the vulnerability's impact on their environments.

Technical summary

A double free vulnerability was found in valkey-io valkey 9.1.0, specifically in the moduleTimerHandler function of src/module.c. The attack can be initiated remotely. This vulnerability has been publicly disclosed and may be utilized by attackers. The CVSS score is 1.9, indicating a low severity. Users should verify their deployments and apply patches cautiously, ensuring compatibility and testing. Further review of src/module.c and moduleTimerHandler function is necessary.

Defensive priority

Low-priority defensive review recommended due to limited CVSS score of 1.9 and lack of detailed vulnerability information.

Recommended defensive actions

• Review valkey-io valkey 9.1.0 src/module.c for double free vulnerability
• Apply patch b349fe2821e3998534b1454c1b64a478daf8c6b7
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

Evidence is limited; primary official records indicate a double free vulnerability in valkey-io valkey 9.1.0. Further review of src/module.c and moduleTimerHandler function is necessary. The CVE record was published on 2026-08-31T10:16:50.780Z and has not been modified since then. Users should verify their deployments and apply patches cautiously, ensuring compatibility and testing.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.