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.

How to fix CVE-2025-32023

To remediate CVE-2025-32023, upgrade the affected package to a fixed version below.

—upgrade to 7.2.11-r0 or later
—upgrade to 6.2.19 or later
—upgrade to 6.2.19 or later
—upgrade to 7.2.10 or later
—upgrade to 7.3.5+ds-1 or later
—upgrade to 5:6.0.16-1+deb11u7 or later
—upgrade to 5:6.0.16-1+deb11u7 or later
—upgrade to 8.1.1+dfsg1-3 or later

Is CVE-2025-32023 being exploited?

Moderate — EPSS is 18.4%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (8)

from 0, < 7.2.11-r0
>= 2.8.0, < 6.2.19, >= 7.0.0, < 7.2.10, >= 8.0.0, < 8.0.3, >= 7.4.0, < 7.4.5
>= 2.8.0, < 6.2.19, >= 7.0.0, < 7.2.10, >= 8.0.0, < 8.0.3, >= 7.4.0, < 7.4.5
from 0, < 7.2.10, >= 7.3.0, < 8.0.4, >= 8.1.0, < 8.1.3
from 0, < 7.3.5+ds-1
from 0, < 5:6.0.16-1+deb11u7
from 0, < 5:6.0.16-1+deb11u7
from 0, < 8.1.1+dfsg1-3

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H