valkey-io valkey Blocked-on-keys blocked.c handleClientsBlockedOnKey use after free (valkey-io valkey)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.36 % · percentile 30 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- VulDB
- NVD status
- Deferred
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.
Weaknesses (CWE)
- CWE-416 — Use After Free
- CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- https://vuldb.com/vuln/397129
- https://vuldb.com/vuln/397129/cti
- https://vuldb.com/cve/CVE-2026-82631
- https://vuldb.com/submit/893793
- https://github.com/valkey-io/valkey/issues/4198
- https://github.com/valkey-io/valkey/pull/4212
- https://github.com/user-attachments/files/30111628/PoC.zip
- https://github.com/valkey-io/valkey/commit/b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b
- https://github.com/valkey-io/valkey/
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | LOW 2.1 | 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 | VulDB |
| CVSS 3.1 | LOW 2.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| CVSS 3.0 | LOW 2.2 | CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| CVSS 2.0 | LOW 1.7 | AV:N/AC:H/Au:M/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
| CVSS 4.0 | LOW 1.2 | 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/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 | NVD · cna@vuldb.com (Secondary) |
| CVSS 3.1 | LOW 2.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L | NVD · cna@vuldb.com (Secondary) |
| CVSS 2.0 | LOW 1.7 | AV:N/AC:H/Au:M/C:N/I:N/A:P | NVD · cna@vuldb.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-68393
- GCVE · GCVE-0-2026-82631
Affected products
| Product | Versions |
|---|---|
| valkey-io · valkey | affected 9.1.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |