CVE-2025-32023: redis Integer/Buffer Overflow — Fix

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.

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CVSS v3.1 Score

7.0

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-680 CWE-680

Affected Products

Vendor	Product	Versions
redis	redis	2.8.0 — 6.2.19
redis	redis	7.2.0 — 7.2.10
redis	redis	7.4.0 — 7.4.5
redis	redis	8.0.0 — 8.0.3

References

Advisories & Patches

https://github.com/redis/redis/commit/50188747cbfe43528d2719399a2a3c9599169445

Other References

https://github.com/redis/redis/releases/tag/6.2.19 https://github.com/redis/redis/releases/tag/7.2.10 https://github.com/redis/redis/releases/tag/7.4.5 https://github.com/redis/redis/releases/tag/8.0.3 https://github.com/redis/redis/security/advisories/GHSA-rp2m-q4j6-gr43 https://www.exploit-db.com/exploits/52477

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 7.0 (HIGH).

How severe is CVE-2025-32023? +

CVE-2025-32023 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-32023? +

CVE-2025-32023 affects products from redis, specifically: redis. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-32023? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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