Memory corruption in redis
Priority LOW 26CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.
Why it matters now
EPSS 0.01144 66th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | redis | redis 5.0.10, redis 6.0.9, redis 6.2.0 | — | No fix listed | CNA |
- redis Vendor— Affected redis 5.0.10, redis 6.0.9, redis 6.2.0 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:redislabs:redis:*:*:*:*:*:*:*:* | before 5.0.10; 6.0.0 to before 6.0.9 | Vulnerable | Redis Labs |
| cpe:2.3:a:redislabs:redis:6.2.0:rc1:*:*:*:*:*:* | 6.2.0 rc1 | Vulnerable | Redis Labs |
| cpe:2.3:a:redislabs:redis:6.2.0:rc2:*:*:*:*:*:* | 6.2.0 rc2 | Vulnerable | Redis Labs |
| cpe:2.3:a:redislabs:redis:6.2.0:rc3:*:*:*:*:*:* | 6.2.0 rc3 | Vulnerable | Redis Labs |
- cpe:2.3:a:redislabs:redis:*:*:*:*:*:*:*:* Versions before 5.0.10; 6.0.0 to before 6.0.9 Vulnerable ·Redis Labs
- cpe:2.3:a:redislabs:redis:6.2.0:rc1:*:*:*:*:*:* Versions 6.2.0 rc1 Vulnerable ·Redis Labs
- cpe:2.3:a:redislabs:redis:6.2.0:rc2:*:*:*:*:*:* Versions 6.2.0 rc2 Vulnerable ·Redis Labs
- cpe:2.3:a:redislabs:redis:6.2.0:rc3:*:*:*:*:*:* Versions 6.2.0 rc3 Vulnerable ·Redis Labs
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Will not fix |
Not affected: 6 products
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Ansible Automation Platform 1.2
- Red Hat Ansible Tower 3
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Software Collections
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3470
- 2026-10-03 Alias added: GHSA-mqmr-8cxh-pqf6
References
More Redis Labs Redis vulnerabilities
- TI-2018-07980 Memory Corruption was discovered in the cmsgpack library in the Lua subsystem in Redis… CVSS 3.0CRITICAL 9.8
- TI-2016-06853 Out-of-bounds write in Redis CVSS 3.1CRITICAL 9.8
- TI-2021-12428 Integer overflow issues with *BIT commands on 32-bit systems CVSS 3.1HIGH 7.5
- TI-2015-03637 Redis before 2.8.21 and 3.x before 3.0.2 allows remote attackers to execute arbitrary Lua bytecode via the eval command. CVSS 2.0HIGH 10.0
- TI-2019-07513 Heap-based buffer overflow in redis CVSS 3.1HIGH 7.2
- TI-2018-08939 Type confusion in the xgroupCommand function in t_stream.c in redis-server in Redis… CVSS 3.0HIGH 7.5
Sources
- CVE-2021-3470 · CVE Program
- CVE-2021-3470 · NVD
- FIRST EPSS
- GHSA-mqmr-8cxh-pqf6 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3470 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences