# CVE-2026-23479: redis-server use-after-free in unblock client flow may allow remote code execution

> CVE-2026-23479: redis-server use-after-free in unblock client flow may allow remote code execution. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-23479
Last updated: 2026-07-25T11:10:00Z

- Published: 2026-05-05 16:36 UTC · Updated: 2026-07-25 11:10 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 1.7%, 76th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-416

## Description

Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from \`processCommandAndResetClient\` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.

## Affected vendors and products

- Red Hat: Red Hat Enterprise Linux 10
- Red Hat: Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat: Red Hat Enterprise Linux 8
- Red Hat: Red Hat Enterprise Linux 9
- Red Hat: Red Hat Enterprise Linux 9.6 Extended Update Support
- Red Hat: Red Hat Hardened Images
- redis: redis

## Tracked companies

- [Redis](https://rewindex.com/company/redis.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-23479)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-23479)
- [https://github.com/redis/redis/releases/tag/8.6.3](https://github.com/redis/redis/releases/tag/8.6.3)
- [https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3](https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-23479 · Markdown: https://rewindex.com/cve/CVE-2026-23479.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-23479 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:59.485Z