Cyber Resilience

CVE-2023-25155

Memory Safety in Redis ≤ 6.0.18

Memory Safety
Published
02 March 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 5.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0090 57th percentile
Risk Priority 50 floored blend · peak EPSS

Summary

CVE-2023-25155 is a medium-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Redis Redis. Its CVSS base score is 5.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 43% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

Redis is an in-memory database that persists on disk and is affected by CVE-2023-25155, an integer overflow vulnerability (CWE-190) present in all versions. The issue manifests when authenticated users issue specially crafted SRANDMEMBER, ZRANDMEMBER, or HRANDFIELD commands, triggering a runtime assertion that terminates the Redis server process. The vulnerability carries a CVSS score of 5.5, reflecting local access requirements with low attack complexity and privileges but high impact on availability.

Authenticated users with the ability to execute the affected commands can exploit this flaw to cause a denial of service by crashing the Redis instance. Because the attack requires authentication and local vector per the CVSS metrics, it is typically limited to insiders or compromised accounts rather than remote unauthenticated attackers.

Advisories and patches released by the Redis project recommend upgrading to versions 6.0.18, 6.2.11, or 7.0.9, which contain fixes for the integer overflow. The corresponding commits and release notes are available in the project's GitHub repository, along with a detailed security advisory.

The exploitation probability remains low, with an EPSS score peaking at approximately 0.06, indicating limited observed interest in active exploitation following disclosure.

EU & UK References

Vulnerability Data

Redis is an in-memory database that persists on disk. Authenticated users issuing specially crafted `SRANDMEMBER`, `ZRANDMEMBER`, and `HRANDFIELD` commands can trigger an integer overflow, resulting in a runtime assertion and termination of the Redis server process. This problem affects all…

more

Redis versions. Patches were released in Redis version(s) 6.0.18, 6.2.11 and 7.0.9.

CWE(s)
CWE-190

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-46817Same product: Redis Redis
CVE-2023-22458Same product: Redis Redis
CVE-2025-46819Same product: Redis Redis
CVE-2026-23479Same product: Redis Redis
CVE-2026-25243Same product: Redis Redis
CVE-2025-32023Same product: Redis Redis
CVE-2026-23631Same product: Redis Redis
CVE-2024-31227Same product: Redis Redis
CVE-2024-51741Same product: Redis Redis
CVE-2025-27151Same product: Redis Redis

Affected Assets

redis
redis
≤ 6.0.18 · 6.2.0 — 6.2.11 · 7.0.0 — 7.0.9

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.6

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require use of safe arithmetic, bounds checks, and testing that prevent integer overflows.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect integer overflows before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and arithmetic checks that prevent integer overflows.

A.8.26 Application security requirements partial match
degrades

Application security requirements include bounds checking and safe arithmetic to avoid overflow conditions.

A.8.27 Secure system architecture and engineering principles partial match
degrades

Secure architecture principles require defensive coding patterns that mitigate integer wraparound risks.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe integer operations and mandate overflow-safe constructs.

References