CVE-2026-85522Public exploitNetwork attack vectorHinoki check available

Server crash via unchecked slot-import job name

Published Sep 4, 2026 · Updated Sep 4, 2026

Out-of-bounds read in Valkey 9.0, 9.1.0, and 9.5.0 through 9.5.4 allows attackers to crash a cluster server via a crafted RDB file. clusterRDBLoadSlotImport accepts a variable-length job_name, and createSlotImportJob copies 40 bytes from it without first verifying that the source is 40 bytes long. The server must have cluster mode enabled and load the crafted file at startup, causing the process to abort before normal service begins.

CVSS severityUnavailable
Unscored
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds read in Valkey 9.0, 9.1.0, and 9.5.0 through 9.5.4 allows attackers to crash a cluster server via a crafted RDB file. clusterRDBLoadSlotImport accepts a variable-length job_name, and createSlotImportJob copies 40 bytes from it without first verifying that the source is 40 bytes long. The server must have cluster mode enabled and load the crafted file at startup, causing the process to abort before normal service begins.

The record

CVE
CVE-2026-85522
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
Valkey
Product
Valkey
Classifications
CWE-119, CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0
  2. Affected versionversion=9.1.0
  3. Affected versionversion=9.5.0
  4. Affected versionversion=9.5.1
  5. Affected versionversion=9.5.2
  6. Affected versionversion=9.5.3
  7. Affected versionversion=9.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Valkey · Valkeyversion=9.0; version=9.1.0; version=9.5.0; version=9.5.1; version=9.5.2; version=9.5.3; version=9.5.4

Published CVSS scores

5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
5.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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