CVE-2025-49844
CriticalExploitedPublic exploitRedis: Redis Lua Use-After-Free may lead to remote code execution
Published Oct 6, 2025 · Updated Sep 8, 2026 · Also known as ALPINE-CVE-2025-49844, BIT-keydb-2025-49844, BIT-redis-2025-49844, BIT-valkey-2025-49844, DEBIAN-CVE-2025-49844, GHSA-4789-qfc9-5f9q, TR-25-0315, UBUNTU-CVE-2025-49844, USN-7824-1, USN-7824-2, USN-7824-3, USN-8169-1, USN-8262-1
Key Facts
Patch immediately- CVE-2025-49844 is a critical-severity vulnerability (CVSS 9.9 v3.1) affecting Valkey (Lfprojects), Redis, redict (alpine) and 22 more products.
- It is exploited in the wild, listed in Industry KEV feed since Dec 23, 2025 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 82% probability of exploitation in the next 30 days.
- Fixed versions are available, including keydb 6.2.20, keydb 7.2.11, keydb 7.4.6.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
82%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-49844 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue 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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Dec 23, 2025 | n/a | Known |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
235 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ValkeyLfprojects | See advisory | 7.2.11 |
| RedisRedis | >= < 8.2.2 | 6.2.20 |
| redictalpine | See advisory | 7.3.6-r0 |
| redis-6.2minimos | See advisory | 6.2.20-r0 |
| redis-7.2minimos | See advisory | 7.2.11-r0 |
Patched Releases
keydb
6.2.20, 7.2.11, 7.4.6, 8.0.4, 8.2.2
Valkey
7.2.11, 0:8.0.6-1.el10_0, 0:8.0.6-2.el9_7, 7.2.11-r0, 7.2.11+dfsg1-0ubuntu0.2, 8.0.4-1.0.1.el10_0, 8.0.6, 8.0.6-1, 8.0.6-1.0.1.el10_0, 8.0.6-1.el10_0, 8.0.6-150600.13.17.1, 8.0.6-150700.3.11.1, 8.0.6-160000.1.1, 8.0.6-2.el10_1, 8.0.6-2.el9_7, 8.0.6-3.amzn2023.0.2, 8.0.6+dfsg1-0ubuntu0.2, 8.1.1+dfsg1-3+deb13u1, 8.1.4, 8.1.4-1.1, 8.1.4-r0, 8.1.4+dfsg1-0ubuntu0.2, 8.1.4+dfsg1-1
liblua5.1-0
5.1.5-8.1ubuntu0.20.04.1~esm1, 5.1.5-8.1ubuntu0.22.04.1~esm1, 5.1.5-8ubuntu1+esm1
liblua5.1-0-dev
5.1.5-8.1ubuntu0.20.04.1~esm1, 5.1.5-8.1ubuntu0.22.04.1~esm1, 5.1.5-8ubuntu1+esm1
liblua5.1-bitop-dev
1.0.2-5ubuntu0.20.04.1~esm2, 1.0.2-5ubuntu0.22.04.1~esm2
liblua5.1-bitop0
1.0.2-5ubuntu0.20.04.1~esm2, 1.0.2-5ubuntu0.22.04.1~esm2
lua-bitop
1.0.2-5ubuntu0.20.04.1~esm2, 1.0.2-5ubuntu0.22.04.1~esm2
lua-bitop-dev
1.0.2-5ubuntu0.20.04.1~esm2, 1.0.2-5ubuntu0.22.04.1~esm2
lua-cjson
2.1.0+dfsg-2.1ubuntu0.20.04.1~esm2, 2.1.0+dfsg-2.1ubuntu0.22.04.1~esm2
lua-cjson-dev
2.1.0+dfsg-2.1ubuntu0.20.04.1~esm2, 2.1.0+dfsg-2.1ubuntu0.22.04.1~esm2
lua5.1
5.1.5-8.1ubuntu0.20.04.1~esm1, 5.1.5-8.1ubuntu0.22.04.1~esm1, 5.1.5-8ubuntu1+esm1
lua5.1-doc
5.1.5-8.1ubuntu0.20.04.1~esm1, 5.1.5-8.1ubuntu0.22.04.1~esm1, 5.1.5-8ubuntu1+esm1
openshift-gitops
1/gitops-rhel8-operator:1.18
redict
7.3.2+ds-1ubuntu0.1, 7.3.5+ds-1ubuntu0.1, 7.3.6-r0, 7.3.6+ds-1
redict-sentinel
7.3.2+ds-1ubuntu0.1, 7.3.5+ds-1ubuntu0.1
redict-server
7.3.2+ds-1ubuntu0.1, 7.3.5+ds-1ubuntu0.1
redict-tools
7.3.2+ds-1ubuntu0.1, 7.3.5+ds-1ubuntu0.1
Redis
0:6.2.6-1.el9_0.5, 2:2.8.4-2ubuntu0.2+esm5, 2:3.0.6-1ubuntu0.4+esm4, 2:3.0.6-1ubuntu0.4+esm5, 5:4.0.9-1ubuntu0.2+esm6, 5:4.0.9-1ubuntu0.2+esm7, 5:5.0.7-2ubuntu0.1+esm4, 5:6.0.16-1+deb11u8, 5:6.0.16-1ubuntu1.1, 5:7.0.15-1~deb12u6, 5:7.0.15-1ubuntu0.24.04.2, 5:7.0.15-1ubuntu0.24.04.4, 5:7.0.15-3ubuntu0.1, 5:8.0.2-3+deb13u1, 5:8.0.2-3ubuntu0.25.10.1, 5:8.0.4-1, 6.0.14-150200.6.43.1, 6.2.19-1.0.1.el9_6, 6.2.19-1.0.2.module+el8.10.0+90680+2298f620, 6.2.20, 6.2.20-1, 6.2.20-1.0.1.module+el8.10.0+90692+1027f9f2, 6.2.20-1.el9_6, 6.2.20-1.module_el8.10.0+4056+739731b0, 6.2.20-1.module+el8.10.0+2081+450a296c, 6.2.20-2.el9_7, 6.2.6-150400.3.40.1, 7.2.10-1.0.2.module+el9.6.0+90681+1a77fe5a, 7.2.11, 7.2.11-1.0.1.module+el9.6.0+90693+e335695b, 7.2.11-1.0.1.module+el9.7.0+90709+dc2ec98a, 7.2.11-1.module_el9.6.0+188+92104ce8, 7.2.11-1.module+el9.7.0+40013+17379f63, 7.2.11-1.ph4, 7.2.11-1.ph5, 7.2.11-r0, 7.2.4-150600.3.18.1, 7.4.6, 8.0.4, 8.0.4-r0, 8.2.0-bp160.1.3, 8.2.2, 8.2.2-1.1, 8.2.2-r0
redis-6.2
6.2.20-r0
redis-7.2
7.2.11-r0
redis-7.4
7.4.6-r0
redis-8.0
8.0.4-r0
redis-8.2
8.2.2-r0
redis-devel
6.2.19-1.0.1.el9_6, 6.2.19-1.0.2.module+el8.10.0+90680+2298f620, 6.2.20-1.0.1.module+el8.10.0+90692+1027f9f2, 6.2.20-1.el9_6, 6.2.20-2.el9_7, 7.2.10-1.0.2.module+el9.6.0+90681+1a77fe5a, 7.2.11-1.0.1.module+el9.6.0+90693+e335695b, 7.2.11-1.0.1.module+el9.7.0+90709+dc2ec98a
redis-doc
6.2.19-1.0.1.el9_6, 6.2.19-1.0.2.module+el8.10.0+90680+2298f620, 6.2.20-1.0.1.module+el8.10.0+90692+1027f9f2, 6.2.20-1.el9_6, 6.2.20-2.el9_7, 7.2.10-1.0.2.module+el9.6.0+90681+1a77fe5a, 7.2.11-1.0.1.module+el9.6.0+90693+e335695b, 7.2.11-1.0.1.module+el9.7.0+90709+dc2ec98a
Timeline
Publicly disclosed
Oct 6, 2025
Added to Industry KEV feed
Dec 23, 2025
Last updated
Sep 8, 2026
Weakness Type
- CWE-416 Use After Free
References
- advisoryRHSA-2025:18931
- advisoryRHSA-2025:18996
- advisoryRHSA-2025:18997
- advisoryRHSA-2025:19086
- advisoryRHSA-2025:19237
FAQ
Common Questions.
Redis is an open source, in-memory database that persists on disk.
Affected: Valkey (Lfprojects); Redis versions >= < 8.2.2; redict (alpine), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Dec 23, 2025 and is known to be used in ransomware campaigns.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including keydb 6.2.20, keydb 7.2.11, keydb 7.4.6.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2025-49844 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo