CVE-2026-82677
valkey-io valkey Module Timer module.c moduleTimerHandler double free
- State
- Published
- Severity
- 4.8 Medium
- Published
- Aug 31, 2026
- Updated
- Aug 31, 2026
- Reserved
- Aug 30, 2026
Description
A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 2.4 Low | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 2.4 Low | CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 3.3 Low | AV:N/AC:L/Au:M/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
valkeyvalkey-io |
|
References
- VDB-397172 | valkey-io valkey Module Timer module.c moduleTimerHandler double freevdb-entrytechnical-description
- VDB-397172 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-82677 | CVE Analysis and Reportthird-party-advisory
- Submit #893959 | Valkey Project Valkey 9.1.0 Double Freethird-party-advisory
- https://github.com/valkey-io/valkey/issues/4200issue-tracking
- https://github.com/valkey-io/valkey/pull/4211issue-trackingpatch
- https://github.com/user-attachments/files/30118801/PoC.zipexploit
- https://github.com/valkey-io/valkey/commit/b349fe2821e3998534b1454c1b64a478daf8c6b7patch
- https://github.com/valkey-io/valkey/product
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.