CVE-2026-86227

valkey: A weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1

CVE-2026-86227 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-86227, released September 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
n/a
moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0052
44th percentile

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."

Where it's fixed

ProductFixed inFixReleased
Linux
valkey · Debian 14 9.1.2-1 DEBIAN-CVE-2026-86227 Sep 17, 2026
valkey · amzn 2023 9.0.6-1.amzn2023.0.1 ALAS2023-2026-3091 Sep 28, 2026
valkey-debuginfo · amzn 2023 9.0.6-1.amzn2023.0.1 ALAS2023-2026-3091 Sep 28, 2026
valkey-debugsource · amzn 2023 9.0.6-1.amzn2023.0.1 ALAS2023-2026-3091 Sep 28, 2026
valkey-devel · amzn 2023 9.0.6-1.amzn2023.0.1 ALAS2023-2026-3091 Sep 28, 2026

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