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.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4240 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4240-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                           Chris Lamb     July 12, 2025                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : redis     Version        : 5:6.0.16-1+deb11u7     CVE IDs        : CVE-2025-32023 CVE-2025-48367     Debian Bugs    : 1108975 1108981

    Two issues were discovered in Redis, the key-value database:

    * CVE-2025-32023: An authenticated user may have used a       specially-crafted string to trigger a stack/heap out-of-bounds       write during hyperloglog operations, potentially leading to a       remote code execution vulnerability. Installations that used Redis'       ACL system to restrict hyperloglog HLL commands are unaffected by       this issue.

    * CVE-2025-48367: An unauthenticated connection could have caused       repeated IP protocol errors, leading to client starvation and       ultimately become a Denial of Service (DoS) attack.

    For Debian 11 bullseye, these problems have been fixed in version     5:6.0.16-1+deb11u7.

    We recommend that you upgrade your redis packages.

    For the detailed security status of redis please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/redis

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of redis installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-32023 advisory.

  - 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. (CVE-2025-32023)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1066 advisory.

    Redis and Valkey contain a defect such that a well constructed hyperloglog can corrupt arbitrary memory on     the heap, which could lead to remote code execution. (CVE-2025-32023)

    Redis and Valkey contain a defect such that a well constructed hyperloglog can corrupt arbitrary memory on     the heap, which could lead to remote code execution. (CVE-2025-48367)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of redis installed on the remote host is prior to 6.2.14-2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2REDIS6-2025-013 advisory.

    Redis and Valkey contain a defect such that a well constructed hyperloglog can corrupt arbitrary memory on     the heap, which could lead to remote code execution. (CVE-2025-32023)

    Redis and Valkey contain a defect such that a well constructed hyperloglog can corrupt arbitrary memory on     the heap, which could lead to remote code execution. (CVE-2025-48367)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1067 advisory.

    Redis and Valkey contain a defect such that a well constructed hyperloglog can corrupt arbitrary memory on     the heap, which could lead to remote code execution. (CVE-2025-32023)

    Redis and Valkey contain a defect such that a well constructed hyperloglog can corrupt arbitrary memory on     the heap, which could lead to remote code execution. (CVE-2025-48367)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the f11d0a69-5b2d-11f0-b507-000c295725e4 advisory.

    Seunghyun Lee reports:

                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.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
242032	Debian dla-4240 : redis - security update	Nessus	Debian Local Security Checks	high
242018	CBL Mariner 2.0 Security Update: redis (CVE-2025-32023)	Nessus	MarinerOS Local Security Checks	high
241772	Amazon Linux 2023 : redis6, redis6-devel (ALAS2023-2025-1066)	Nessus	Amazon Linux Local Security Checks	high
241769	Amazon Linux 2 : redis (ALASREDIS6-2025-013)	Nessus	Amazon Linux Local Security Checks	high
241729	Amazon Linux 2023 : valkey, valkey-devel (ALAS2023-2025-1067)	Nessus	Amazon Linux Local Security Checks	high
241488	FreeBSD : redis,valkey -- Out of bounds write in hyperloglog commands leads to RCE (f11d0a69-5b2d-11f0-b507-000c295725e4)	Nessus	FreeBSD Local Security Checks	high

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CVE-2025-32023

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Tenable Plugins

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high