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CVE-2021-32625

redis: Heap corruption via `STRALGO LCS` command (Incomplete fix for CVE-2021-29477)

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Severity

Important

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · June 1, 2021

Updated · February 25, 2026

Description

A flaw was found in Redis. An integer overflow could be exploited using the STRALGO LCS command to corrupt the heap and potentially result with remote code execution. This is a result of an incomplete fix by CVE-2021-29477. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Statement

This issue only affects 32-bit Redis version 6.0 or newer. The Redis module streams shipped with Red Hat Enterprise Linux 8 are not affected by this flaw:

  • redis:5 does not include a vulnerable version of Redis.
  • redis:6 does not provide support for 32-bit Redis.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-190 · Integer Overflow or Wraparound