TI-2022-16446 Aliases CVE-2022-36021

Redis string pattern matching can be abused to achieve Denial of Service

MEDIUM 59CWE-407Published 2023-03-01 · Updated 2025-03-07

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-407.

Summary

Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.59769 99th percentileScored 2026-11-07

Fix Partial redis (redis): 6.0.18, 6.2.11, 7.0.9Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Redis	redis	before 6.0.18; 6.2.0 to before 6.2.11; 7.0.0 to before 7.0.9	6.0.18, 6.2.11, 7.0.9	Patch available	CNA

redis VendorRedis Affected before 6.0.18; 6.2.0 to before 6.2.11; 7.0.0 to before 7.0.9 Fixed in 6.0.18, 6.2.11, 7.0.9 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:redis:redis::::::::	before 6.0.18; 6.2.0 to before 6.2.11; 7.0.0 to before 7.0.9	Vulnerable	Redis

cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:* Versions before 6.0.18; 6.2.0 to before 6.2.11; 7.0.0 to before 7.0.9 Vulnerable ·Redis

Remediation

Fix · CNA redis (redis) Fixed in 6.0.18, 6.2.11, 7.0.9

Red Hat 1 advisory

RHSA-2025:0595 Released 2025-01-22 · Red Hat rating Important
redis:6 security update
- Red Hat Enterprise Linux AppStream (v. 8) redis-6.2.17-1.module+el8.10.0+22680+748527fd.aarch64::redis:6, redis-6.2.17-1.module+el8.10.0+22680+748527fd.ppc64le::redis:6, redis-6.2.17-1.module+el8.10.0+22680+748527fd.s390x::redis:6 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenStack Platform 13 (Queens)	Affected	No fix planned: Out of support scope
Red Hat Software Collections	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2025:0595

Not affected: 1 product

Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2022-36021

References

Patch 1

https://github.com/redis/redis/commit/dcbfcb916ca1a269b3feef86ee86835294758f84

Advisory 1

https://github.com/redis/redis/security/advisories/GHSA-jr7j-rfj5-8xqv

TI-2022-00463 Missing authorization in Debian redis KEVCVSS 3.1CRITICAL 10.0
TI-2025-31759 Redis Lua Use-After-Free may lead to remote code execution CVSS 3.1CRITICAL 10.0
TI-2023-18618 Heap overflow in COMMAND GETKEYS and ACL evaluation in Redis CVSS 3.1HIGH 8.8
TI-2024-20813 Lua library commands may lead to stack overflow and RCE in Redis CVSS 3.1HIGH 8.8
TI-2022-08647 Heap overflow issue with the Lua cjson library used by Redis CVSS 3.1HIGH 8.8
TI-2022-08549 Lua scripts can be manipulated to overcome ACL rules in Redis CVSS 3.1HIGH 7.8

See all 45 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences