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.
References10
- github.com/user-attachments/files/30118801/PoC.zip
- github.com/valkey-io/valkey/
- github.com/valkey-io/valkey/commit/b349fe2821e3998534b1454c1b64…
- github.com/valkey-io/valkey/issues/4200
- github.com/valkey-io/valkey/pull/4211
- vuldb.com/cve/CVE-2026-82677
- vuldb.com/submit/893959
- vuldb.com/vuln/397172
- vuldb.com/vuln/397172/cti
- github.com/valkey-io/valkey/issues/4200
Metrics
- CVSS 3.1
-
2.4
LOW
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L - CVSS 4.0
-
1.9
LOW
Score source: CNA
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 22 · as of 8 November 2026
- CWE
- CWE-119CWE-415
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.