CVE-2026-82631
Published: September 3, 2026Last modified: September 18, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 2.2 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | HIGH |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 25 LTS | valkey | Fixed (8.1.10-r0) |
| Stream | valkey | Fixed (9.0.6-r0) |
References
- https://github.com/user-attachments/files/30111628/PoC.zip
- https://github.com/valkey-io/valkey/
- https://github.com/valkey-io/valkey/commit/b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b
- https://github.com/valkey-io/valkey/issues/4198
- https://github.com/valkey-io/valkey/pull/4212
- https://vuldb.com/cve/CVE-2026-82631
- https://vuldb.com/submit/893793
- https://vuldb.com/vuln/397129
- https://vuldb.com/vuln/397129/cti