Lua scripts can overflow the heap-based Lua stack in Redis
Redis is an open source, in-memory database that persists on disk. In affected versions specially crafted Lua scripts executing in Redis can cause the heap-based Lua stack to be overflowed, due to incomplete checks for this condition. This can result with heap corruption and potentially remote code execution. This problem exists in all versions of Redis with Lua scripting support, starting from 2.6. The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14. For users unable to update an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.
- Published
- Oct 4, 2021
- Updated
- Jun 16, 2026
- EPSS
- 16.2% · 97th percentile
- CWE
- CWE-122
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Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 16.2%
CNA vs NVD score
- NVD
- 8.8
- CNA · GitHub_M
- 7.5
- 1.3 point gap
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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 |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| netapp | management services for element software | cpe:2.3:a:netapp:management_services_for_element_software |
| netapp | management services for netapp hci | cpe:2.3:a:netapp:management_services_for_netapp_hci |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| oracle | communications operations monitor | cpe:2.3:a:oracle:communications_operations_monitor |
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Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- redis redis2.6 and later · before 5.0.14
- redis redis6.0.0 and later · before 6.0.16
- redis redis6.2.0 and later · before 6.2.6
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
- >= 6.2.0, < 6.2.6, >= 6.0.0, < 6.0.16, >= 2.6.0, < 5.0.14affected
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 6.0.9-5.module_el8.4.0+2584+1bb0d2aa | 6.0.9-5.module_el8.4.0+2584+1bb0d2aa |
| AlmaLinux:8 | redis | before 5.0.3-5.module_el8.4.0+2583+b9845322 | 5.0.3-5.module_el8.4.0+2583+b9845322 |
| AlmaLinux:8 | redis | before 5.0.3-5.module_el8.5.0+66+fc19ec12 | 5.0.3-5.module_el8.5.0+66+fc19ec12 |
| AlmaLinux:8 | redis | before 6.0.9-5.module_el8.5.0+67+a3c431d9 | 6.0.9-5.module_el8.5.0+67+a3c431d9 |
| AlmaLinux:8 | redis-devel | before 5.0.3-5.module_el8.4.0+2583+b9845322 | 5.0.3-5.module_el8.4.0+2583+b9845322 |
| AlmaLinux:8 | redis-devel | before 6.0.9-5.module_el8.5.0+67+a3c431d9 | 6.0.9-5.module_el8.5.0+67+a3c431d9 |
| AlmaLinux:8 | redis-devel | before 6.0.9-5.module_el8.4.0+2584+1bb0d2aa | 6.0.9-5.module_el8.4.0+2584+1bb0d2aa |
| AlmaLinux:8 | redis-devel | before 5.0.3-5.module_el8.5.0+66+fc19ec12 | 5.0.3-5.module_el8.5.0+66+fc19ec12 |
| AlmaLinux:8 | redis-doc | before 5.0.3-5.module_el8.4.0+2583+b9845322 | 5.0.3-5.module_el8.4.0+2583+b9845322 |
| AlmaLinux:8 | redis-doc | before 6.0.9-5.module_el8.4.0+2584+1bb0d2aa | 6.0.9-5.module_el8.4.0+2584+1bb0d2aa |
| Alpine:v3.11 | redis | from 2.6 · before 5.0.14-r0 | 5.0.14-r0 |
| Alpine:v3.13 | redis | from 2.6 · before 6.0.16-r0 | 6.0.16-r0 |
| Alpine:v3.14 | redis | from 2.6 · before 6.2.6-r0 | 6.2.6-r0 |
| Debian:10 | redis | before 5:5.0.14-1+deb10u1 | 5:5.0.14-1+deb10u1 |
| Debian:11 | redis | before 5:6.0.16-1+deb11u1 | 5:6.0.16-1+deb11u1 |
| Debian:12 | redis | before 5:6.0.16-1 | 5:6.0.16-1 |
| Debian:9 | redis | before 3:3.2.6-3+deb9u8 | 3:3.2.6-3+deb9u8 |
| openSUSE:Leap 15.3 | redis | before 6.0.14-6.8.1 | 6.0.14-6.8.1 |
| openSUSE:Tumbleweed | redis | before 6.2.6-1.1 | 6.2.6-1.1 |
| Red Hat:enterprise_linux:8::appstream | redis | before 0:5.0.3-5.module+el8.4.0+12927+b9845322 | 0:5.0.3-5.module+el8.4.0+12927+b9845322 |
| Red Hat:enterprise_linux:8::appstream | redis | before 0:6.0.9-5.module+el8.4.0+12929+1bb0d2aa | 0:6.0.9-5.module+el8.4.0+12929+1bb0d2aa |
| Red Hat:enterprise_linux:8::appstream | redis-debuginfo | before 0:5.0.3-5.module+el8.4.0+12927+b9845322 | 0:5.0.3-5.module+el8.4.0+12927+b9845322 |
| Red Hat:enterprise_linux:8::appstream | redis-debuginfo | before 0:6.0.9-5.module+el8.4.0+12929+1bb0d2aa | 0:6.0.9-5.module+el8.4.0+12929+1bb0d2aa |
| Red Hat:enterprise_linux:8::appstream | redis-debugsource | before 0:5.0.3-5.module+el8.4.0+12927+b9845322 | 0:5.0.3-5.module+el8.4.0+12927+b9845322 |
+24
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 | 5.0.3-5.module_el8.4.0+2583+b9845322 · AlmaLinux:8 | Package registry (OSV) |
| AlmaLinux:redis-devel | 5.0.3-5.module_el8.5.0+66+fc19ec12 · AlmaLinux:8 | Package registry (OSV) |
| AlmaLinux:redis-doc | 5.0.3-5.module_el8.4.0+2583+b9845322 · AlmaLinux:8 | Package registry (OSV) |
| Alpine:redis | 5.0.14-r0 · Alpine:v3.11 | Package registry (OSV) |
| Debian:redis | 5:6.0.16-1 · Debian:12 | Package registry (OSV) |
| openSUSE:redis | 6.0.14-6.8.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| Red Hat:redis | 0:5.0.3-5.module+el8.4.0+12927+b9845322 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-debuginfo | 0:5.0.3-5.module+el8.4.0+12927+b9845322 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-debugsource | 0:5.0.3-5.module+el8.4.0+12927+b9845322 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-devel | 0:5.0.3-5.module+el8.4.0+12927+b9845322 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:redis-doc | 0:5.0.3-5.module+el8.4.0+12927+b9845322 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| Red Hat:rh-redis5-redis | 0:5.0.5-3.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| Red Hat:rh-redis5-redis-debuginfo | 0:5.0.5-3.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| Rocky Linux:redis | 0:5.0.3-5.module+el8.5.0+657+2674830e · Rocky Linux:8 | Package registry (OSV) |
| SUSE:redis | 6.0.14-6.8.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP2 | 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
- Anyone who can reach it over the internet 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
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-122 · Heap-based Buffer OverflowCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
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/666ed7facf4524bf6d19b11b20faa2cf93fdf591
- github.com/redis/redis/security/advisories/GHSA-p486-xggp-782c
- lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435abcd732d41531a0%40%3Ccommits.druid.apache.org%3E
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/
- security.gentoo.org/glsa/202209-17
- security.netapp.com/advisory/ntap-20211104-0003/
- www.debian.org/security/2021/dsa-5001
- www.oracle.com/security-alerts/cpuapr2022.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.