CVE-2026-82631

Description

A security flaw has been discovered in valkey-io valkey 9.1.0. The affected element is the function handleClientsBlockedOnKey of the file src/blocked.c of the component Blocked-on-keys Subsystem. The manipulation results in use after free. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The patch is identified as b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b. Applying a patch is advised to resolve this issue.

References

https://vuldb.com/vuln/397129/cti

https://vuldb.com/vuln/397129

https://vuldb.com/submit/893793

https://vuldb.com/cve/CVE-2026-82631

https://github.com/valkey-io/valkey/pull/4212

https://github.com/valkey-io/valkey/issues/4198

https://github.com/valkey-io/valkey/commit/b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b

https://github.com/valkey-io/valkey/

https://github.com/user-attachments/files/30111628/PoC.zip

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS