CVE-2022-35951

Code execution via XAUTOCLAIM reply-array overflow

Published Sep 23, 2022 · Updated Apr 23, 2025

Heap overflow in Redis 7.0.0 through 7.0.4 allows attackers to execute code through a crafted XAUTOCLAIM COUNT argument. In xautoclaimCommand, the COUNT limit tracks only claimed entries while deleted pending entries accumulate in an undersized temporary reply array, causing an out-of-bounds heap write. Exploitation requires command access and a stream consumer group with deleted entries in its pending list; success can crash the server or execute code in its process.

CVSS severity7.0
High
EPSS probability3.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Redis 7.0.0 through 7.0.4 allows attackers to execute code through a crafted XAUTOCLAIM COUNT argument. In xautoclaimCommand, the COUNT limit tracks only claimed entries while deleted pending entries accumulate in an undersized temporary reply array, causing an out-of-bounds heap write. Exploitation requires command access and a stream consumer group with deleted entries in its pending list; success can crash the server or execute code in its process.

The record

CVE
CVE-2022-35951
Published
Sep 23, 2022
Updated
Apr 23, 2025
Vendor
Redis
Product
Redis
Classifications
CWE-680, CWE-190
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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, < 7.0.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Redis · Redisversion=>= 7.0.0, < 7.0.5

Published CVSS scores

7.0GitHubCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-680Integer Overflow to Buffer Overflow
CWE-190Integer Overflow or Wraparound

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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