Redis allows out of bounds writes in hyperloglog commands leading to RCE (CVE-2025-32023)
Redis is an open source, in-memory database that persists on disk. From 2.8 to before 8.0.3, 7.4.5, 7.2.10, and 6.2.19, an authenticated user may use a specially crafted string to trigger a stack/heap out of bounds write on hyperloglog operations, potentially leading to remote code execution. The bug likely affects all Redis versions with hyperloglog operations implemented. This vulnerability is fixed in 8.0.3, 7.4.5, 7.2.10, and 6.2.19. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing hyperloglog operations. This can be done using ACL to restrict HLL commands.
AI Analysis
Technical Summary
This advisory covers two security vulnerabilities in Redis 6 as packaged for Red Hat Enterprise Linux 8. CVE-2025-48367 is an unauthenticated denial of service vulnerability, and CVE-2025-32023 is an out-of-bounds write vulnerability related to the Hyperloglog data structure. Both vulnerabilities could impact the stability and security of Redis instances. The update to redis-6.2.19-1.module+el8.10.0+23330+19e91c41 addresses these issues. The advisory does not provide CVSS scores but rates the impact as important.
Potential Impact
The vulnerabilities could allow an unauthenticated attacker to cause denial of service or potentially corrupt memory via an out-of-bounds write, impacting Redis service availability and integrity. No known exploits in the wild have been reported. The impact is rated as important by Red Hat, indicating a significant security concern but not necessarily critical.
Mitigation Recommendations
Red Hat has released updated Redis packages for Red Hat Enterprise Linux 8 that address these vulnerabilities. Users should apply the provided updates as per Red Hat's instructions at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated or required beyond applying the official update.
Redis allows out of bounds writes in hyperloglog commands leading to RCE (CVE-2025-32023)
Description
Redis is an open source, in-memory database that persists on disk. From 2.8 to before 8.0.3, 7.4.5, 7.2.10, and 6.2.19, an authenticated user may use a specially crafted string to trigger a stack/heap out of bounds write on hyperloglog operations, potentially leading to remote code execution. The bug likely affects all Redis versions with hyperloglog operations implemented. This vulnerability is fixed in 8.0.3, 7.4.5, 7.2.10, and 6.2.19. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing hyperloglog operations. This can be done using ACL to restrict HLL commands.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security vulnerabilities in Redis 6 as packaged for Red Hat Enterprise Linux 8. CVE-2025-48367 is an unauthenticated denial of service vulnerability, and CVE-2025-32023 is an out-of-bounds write vulnerability related to the Hyperloglog data structure. Both vulnerabilities could impact the stability and security of Redis instances. The update to redis-6.2.19-1.module+el8.10.0+23330+19e91c41 addresses these issues. The advisory does not provide CVSS scores but rates the impact as important.
Potential Impact
The vulnerabilities could allow an unauthenticated attacker to cause denial of service or potentially corrupt memory via an out-of-bounds write, impacting Redis service availability and integrity. No known exploits in the wild have been reported. The impact is rated as important by Red Hat, indicating a significant security concern but not necessarily critical.
Mitigation Recommendations
Red Hat has released updated Redis packages for Red Hat Enterprise Linux 8 that address these vulnerabilities. Users should apply the provided updates as per Red Hat's instructions at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:12006
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-48367"]
Threat ID: 6a419cb827e9c79719abddd7
Added to database: 06/28/2026, 22:14:16 UTC
Last enriched: 08/07/2026, 01:02:11 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 23
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