High [CVE-2026-23479] use-after-free in unblock client flow may allow remote code execution
This high-severity Red Hat Linux advisory covers CVE-2026-23479 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Hardened Images.
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Summary
use-after-free in unblock client flow may allow remote code execution. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-416. Affected package(s): redis:7, valkey.
Resolved in Red Hat advisory RHSA-2026:26540 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Hardened Images.
- redis:7-9080020260521083756.9
- valkey-0:8.0.9-1.el10_2
- redis:7-9060020260602115714.9
- valkey-0:8.0.9-1.el10_0
- valkey-0:8.0.9-1.el9_8
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:26540
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26540 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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