CVE-2023-36824Network attack vector

Code execution via underallocated key-result buffer

Published Jul 11, 2023 · Updated Feb 13, 2025

Heap-based buffer overflow in Redis 7.0.0 through 7.0.11 allows remote authenticated users to execute code via crafted key arguments. The getKeysUsingKeySpecs function reallocates after more than 256 keys without counting keys already found or preserving prior entries, leaving slots uninitialized and underallocating the result. Reachability requires crafted COMMAND GETKEYS operations or variadic key arguments evaluated by key-matching ACL rules; consequences include heap-memory disclosure, server corruption, crash, or code execution.

CVSS severity7.4
High
EPSS probability77.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Redis 7.0.0 through 7.0.11 allows remote authenticated users to execute code via crafted key arguments. The getKeysUsingKeySpecs function reallocates after more than 256 keys without counting keys already found or preserving prior entries, leaving slots uninitialized and underallocating the result. Reachability requires crafted COMMAND GETKEYS operations or variadic key arguments evaluated by key-matching ACL rules; consequences include heap-memory disclosure, server corruption, crash, or code execution.

The record

CVE
CVE-2023-36824
Published
Jul 11, 2023
Updated
Feb 13, 2025
Vendor
Redis
Product
Redis
Classifications
CWE-122, CWE-131, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=>= 7.0.0, < 7.0.12
  2. Affected versionversion=7.0.0 <7.0.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Redis · Redisversion=>= 7.0.0, < 7.0.12; version=7.0.0 <7.0.12

Published CVSS scores

7.4GitHub Security AdvisoryCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-131Incorrect Calculation of Buffer Size
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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