Red Hat Security Advisory: redis security update
Redis is an advanced key-value store. It is often referred to as a data-structure server since keys can contain strings, hashes, lists, sets, and sorted sets. For performance, Redis works with an in-memory data set. You can persist it either by dumping the data set to disk every once in a while, or by appending each command to a log. Security Fix(es): * redis: Lua library commands may lead to integer overflow and potential RCE (CVE-2025-46817) * Redis: Redis: Authenticated users can execute LUA scripts as a different user (CVE-2025-46818) * Redis: Redis is vulnerable to DoS via specially crafted LUA scripts (CVE-2025-46819) * Redis: Redis Lua Use-After-Free may lead to remote code execution (CVE-2025-49844) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
This advisory covers four distinct vulnerabilities in Redis related to its LUA scripting capabilities: CVE-2025-46817 involves integer overflow in Lua library commands potentially enabling remote code execution; CVE-2025-46818 allows authenticated users to execute LUA scripts as a different user; CVE-2025-46819 enables denial of service through specially crafted LUA scripts; and CVE-2025-49844 is a use-after-free vulnerability in Redis Lua that may lead to remote code execution. These vulnerabilities affect Redis versions shipped with Red Hat Enterprise Linux 9 and its extended update support releases across multiple hardware architectures. Red Hat has released updated Redis packages to fix these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker with authenticated access to execute arbitrary code remotely, impersonate other users when running LUA scripts, or cause denial of service conditions. The integer overflow and use-after-free issues specifically may lead to remote code execution, posing a high risk to affected systems. The denial of service vulnerability could disrupt availability of Redis services.
Mitigation Recommendations
Red Hat has released updated Redis packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 and its extended support versions should apply the Redis security update as detailed in Red Hat advisory RHSA-2025:20926. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation steps are indicated beyond applying the official patches.
Red Hat Security Advisory: redis security update
Description
Redis is an advanced key-value store. It is often referred to as a data-structure server since keys can contain strings, hashes, lists, sets, and sorted sets. For performance, Redis works with an in-memory data set. You can persist it either by dumping the data set to disk every once in a while, or by appending each command to a log. Security Fix(es): * redis: Lua library commands may lead to integer overflow and potential RCE (CVE-2025-46817) * Redis: Redis: Authenticated users can execute LUA scripts as a different user (CVE-2025-46818) * Redis: Redis is vulnerable to DoS via specially crafted LUA scripts (CVE-2025-46819) * Redis: Redis Lua Use-After-Free may lead to remote code execution (CVE-2025-49844) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers four distinct vulnerabilities in Redis related to its LUA scripting capabilities: CVE-2025-46817 involves integer overflow in Lua library commands potentially enabling remote code execution; CVE-2025-46818 allows authenticated users to execute LUA scripts as a different user; CVE-2025-46819 enables denial of service through specially crafted LUA scripts; and CVE-2025-49844 is a use-after-free vulnerability in Redis Lua that may lead to remote code execution. These vulnerabilities affect Redis versions shipped with Red Hat Enterprise Linux 9 and its extended update support releases across multiple hardware architectures. Red Hat has released updated Redis packages to fix these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker with authenticated access to execute arbitrary code remotely, impersonate other users when running LUA scripts, or cause denial of service conditions. The integer overflow and use-after-free issues specifically may lead to remote code execution, posing a high risk to affected systems. The denial of service vulnerability could disrupt availability of Redis services.
Mitigation Recommendations
Red Hat has released updated Redis packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 and its extended support versions should apply the Redis security update as detailed in Red Hat advisory RHSA-2025:20926. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:20926
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-46818","CVE-2025-46819","CVE-2025-49844"]
Threat ID: 6a419cad27e9c79719ab9df0
Added to database: 06/28/2026, 22:14:05 UTC
Last enriched: 07/12/2026, 10:58:28 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 20
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