CVE-2026-86227valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds
Descripción
A weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1. This affects the function kvstoreGetHashtable of the file src/kvstore.c. This manipulation of the argument didx causes out-of-bounds read. It is possible to initiate the attack remotely. The attack is considered to have high complexity. It is indicated that the exploitability is difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 4691888e7fab3df128f0bde5750c9fde2ae552fa. To fix this issue, it is recommended to deploy a patch. Exploitation requires cluster mode plus attacker-controlled dump.rdb at startup (data-dir write access, replication feed, or a stored crafted RDB) - an attacker-position DoS at boot, not network pre-auth. The issue report was closed stating it "is worth fixing for the sake of memory safety… but I don't think it meets our bar for a security disclosure."
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
Referencias y parches
- VDB-399380 | valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds vdb-entrytechnical-description
- VDB-399380 | CTI Indicators (IOB, IOC, IOA) signature
- CVE-2026-86227 | CVE Analysis and Report third-party-advisory
- Submit #897659 | Valkey Project Valkey 9.1.0 Out-of-Bounds Read third-party-advisory
- https://github.com/valkey-io/valkey/issues/4222 issue-tracking
- https://github.com/valkey-io/valkey/pull/4229 issue-trackingpatch
- https://github.com/user-attachments/files/30195539/RDB.zip exploit
- https://github.com/valkey-io/valkey/commit/4691888e7fab3df128f0bde5750c9fde2ae552fa patch
- https://github.com/valkey-io/valkey/ product