CVE-2026-82677: Double Free in valkey-io valkey
Description
CVE-2026-82677 is a medium severity vulnerability in valkey-io valkey version 9.1.0. It involves a double free issue in the moduleTimerHandler function of the Module Timer Subsystem, which can be triggered remotely. Exploit code has been publicly disclosed. A patch identified by commit b349fe2821e3998534b1454c1b64a478daf8c6b7 is recommended for remediation.
CVSS v4.0
Score 4.8medium
Affected software
valkey-io
valkey
cpe:2.3:a:valkey-io:valkey:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects valkey-io valkey version 9.1.0. The flaw is a double free in the function moduleTimerHandler within src/module.c of the Module Timer Subsystem. The issue can be triggered remotely without user interaction and requires high privileges. The vulnerability has a CVSS 4.8 (medium) score and a public exploit disclosure exists. A patch is available as indicated by the referenced commit hash.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption due to double free, potentially causing application instability or denial of service. The attack can be initiated remotely but requires high privileges. There is no indication of confidentiality, integrity, or availability impacts beyond limited availability impact. No known active exploitation in the wild has been reported.
Mitigation Recommendations
A patch is available for this vulnerability, referenced by commit b349fe2821e3998534b1454c1b64a478daf8c6b7. It is recommended to deploy this patch to remediate the issue. Since the vendor advisory or official remediation level is not explicitly provided, users should verify the patch status with the vendor or source repository. No other mitigation guidance is specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-30T16:36:08.965Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9555f1acd9273b49f02f08
Added to database: 08/31/2026, 10:22:41 UTC
Last enriched: 09/07/2026, 15:47:47 UTC
Last updated: 10/14/2026, 18:48:24 UTC
Views: 97
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