CVE-2026-82631
Publication date 31 August 2026
Last updated 31 August 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| valkey | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy | Not in release |
Severity score breakdown
CVSS version:
Base score
1.2 · Low
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Base score
2.2 · Low
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-82631
- 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