valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds (CVE-2026-86227) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-86227

valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds

Answer in brief

CVE-2026-86227 records a Unknown severity vulnerability in valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds. The current sources do not mark it as known exploited. The current feed maps valkey-io/valkey (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 6, 2026Updated Sep 6, 2026Source checked Sep 6, 2026First seen by HOL Sep 6, 2026Material review Sep 6, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps valkey-io/valkey (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
valkey-io/valkeygeneric	9.0.0 \|\| 9.0.1 \|\| 9.0.2 \|\| 9.0.3 \|\| 9.0.4 \|\| 9.0.5 \|\| 9.1.0 \|\| 9.1.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for valkey-io/valkey.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 6, 2026

Sources and claim methodology

Upstream source description

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."

Quoted source text, attributed separately from HOL analysis.