Redis string pattern matching can be abused to achieve Denial of Service
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.
- Published
- Mar 1, 2023
- Updated
- Jun 17, 2026
- EPSS
- 59.8% · 99th percentile
- CWE
- CWE-407
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Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 18 / 30 · 59.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 5.5
- CNA · GitHub_M
- 5.5
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| redis | redis | cpe:2.3:a:redis:redis |
Using redis? Add it to your stack and be the first to know about CVEs like this one. (Redis)
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- redis redisbefore 6.0.18
- redis redis6.2.0 and later · before 6.2.11
- redis redis7.0.0 and later · before 7.0.9
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
redis redis
- < 6.0.18, >= 6.2.0, < 6.2.11, >= 7.0.0, < 7.0.9affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | redis | before 6.2.17-1.module_el8.10.0+3946+3de613d5 | 6.2.17-1.module_el8.10.0+3946+3de613d5 |
| AlmaLinux:8 | redis-devel | before 6.2.17-1.module_el8.10.0+3946+3de613d5 | 6.2.17-1.module_el8.10.0+3946+3de613d5 |
| AlmaLinux:8 | redis-doc | before 6.2.17-1.module_el8.10.0+3946+3de613d5 | 6.2.17-1.module_el8.10.0+3946+3de613d5 |
| Debian:10 | redis | before 5:5.0.14-1+deb10u3 | 5:5.0.14-1+deb10u3 |
| Debian:11 | redis | before 5:6.0.16-1+deb11u3 | 5:6.0.16-1+deb11u3 |
| Debian:12 | redis | before 5:7.0.9-1 | 5:7.0.9-1 |
| openSUSE:Tumbleweed | redis | before 7.0.8-2.1 | 7.0.8-2.1 |
| Red Hat:enterprise_linux:8::appstream | redis | before 0:6.2.17-1.module+el8.10.0+22680+748527fd | 0:6.2.17-1.module+el8.10.0+22680+748527fd |
| Red Hat:enterprise_linux:8::appstream | redis-debuginfo | before 0:6.2.17-1.module+el8.10.0+22680+748527fd | 0:6.2.17-1.module+el8.10.0+22680+748527fd |
| Red Hat:enterprise_linux:8::appstream | redis-debugsource | before 0:6.2.17-1.module+el8.10.0+22680+748527fd | 0:6.2.17-1.module+el8.10.0+22680+748527fd |
| Red Hat:enterprise_linux:8::appstream | redis-devel | before 0:6.2.17-1.module+el8.10.0+22680+748527fd | 0:6.2.17-1.module+el8.10.0+22680+748527fd |
| Red Hat:enterprise_linux:8::appstream | redis-doc | before 0:6.2.17-1.module+el8.10.0+22680+748527fd | 0:6.2.17-1.module+el8.10.0+22680+748527fd |
| Rocky Linux:8 | redis | before 0:6.2.17-1.module+el8.10.0+1923+5b85c6a7 | 0:6.2.17-1.module+el8.10.0+1923+5b85c6a7 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | redis | before 6.0.14-150200.6.20.1 | 6.0.14-150200.6.20.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP4 | redis | before 6.2.6-150400.3.16.1 | 6.2.6-150400.3.16.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP4 | redis | before 6.2.6-150400.3.16.1 | 6.2.6-150400.3.16.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP4 | redis | before 6.2.6-150400.3.19.1 | 6.2.6-150400.3.19.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP4 | redis | before 6.2.6-150400.3.19.1 | 6.2.6-150400.3.19.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP5 | redis7 | before 7.0.8-150500.3.3.1 | 7.0.8-150500.3.3.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP5 | redis7 | before 7.0.8-150500.3.3.1 | 7.0.8-150500.3.3.1 |
Same product
redis: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-0543It was discovered, that redis, a persistent key-value database, due to a packaging issue, is prone to a (Debian-specific) Lua sandbox escapeKEV100Now
- CVE-2025-49844Redis Lua Use-After-Free may lead to remote code execution64This week
- CVE-2023-36824Heap overflow in COMMAND GETKEYS and ACL evaluation in Redis58Plan
- CVE-2022-24834Heap overflow issue with the Lua cjson library used by Redis47Plan
- CVE-2023-22458Integer overflow in multiple Redis commands can lead to denial-of-service44Plan
- CVE-2024-46981Redis' Lua library commands may lead to remote code execution41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| AlmaLinux:redis | 6.2.17-1.module_el8.10.0+3946+3de613d5 · AlmaLinux:8 | Package registry (OSV) |
| AlmaLinux:redis-devel | 6.2.17-1.module_el8.10.0+3946+3de613d5 · AlmaLinux:8 | Package registry (OSV) |
| AlmaLinux:redis-doc | 6.2.17-1.module_el8.10.0+3946+3de613d5 · AlmaLinux:8 | Package registry (OSV) |
| Debian:redis | 5:7.0.9-1 · Debian:12 | Package registry (OSV) |
| openSUSE:redis | 6.2.6-150400.3.16.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| openSUSE:redis7 | 7.0.8-150500.3.3.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| Red Hat:redis | 0:6.2.17-1.module+el8.10.0+22680+748527fd · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-debuginfo | 0:6.2.17-1.module+el8.10.0+22680+748527fd · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-debugsource | 0:6.2.17-1.module+el8.10.0+22680+748527fd · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-devel | 0:6.2.17-1.module+el8.10.0+22680+748527fd · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-doc | 0:6.2.17-1.module+el8.10.0+22680+748527fd · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Rocky Linux:redis | 0:6.2.17-1.module+el8.10.0+1923+5b85c6a7 · Rocky Linux:8 | Package registry (OSV) |
| SUSE:redis | 6.0.14-150200.6.20.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | Package registry (OSV) |
| SUSE:redis | 6.2.6-150400.3.16.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP4 | Package registry (OSV) |
| SUSE:redis7 | 7.0.8-150500.3.3.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-407 · Inefficient Algorithmic ComplexityCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/redis/redis/commit/dcbfcb916ca1a269b3feef86ee86835294758f84
- github.com/redis/redis/security/advisories/GHSA-jr7j-rfj5-8xqv
Vendor advisories and official records. Exploit/PoC links are deliberately left out.