Low [CVE-2026-82631] Use-after-free vulnerability in Blocked-on-keys subsystem
This low-severity Red Hat Linux advisory covers CVE-2026-82631 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9.
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Summary
A security flaw has been discovered in valkey-io valkey 9.1.0. The affected element is the function handleClientsBlockedOnKey of the file src/blocked.c of the component Blocked-on-keys Subsystem.
The manipulation results in use after free. The attack may be performed from remote.
A high complexity level is associated with this attack. The exploitability is described as difficult.
The exploit has been released to the public and may be used for attacks. The patch is identified as b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b.
Applying a patch is advised to resolve this issue. A flaw was found in Valkey.
A remote attacker could exploit this flaw, leading to a denial of service. The complexity of exploiting this vulnerability is high.
Red Hat severity: Low. Weakness: CWE-825.
Affected Red Hat products: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9. Red Hat fixing advisory: RHSA-2026:61884.
Affected products named by the advisory: Red Hat package: valkey.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- valkey-main-9.0.6-0.1.hum1
- RHSA-2026:61884
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation
Upgrade to a fixed release: valkey-main-9.0.6-0.1.hum1, RHSA-2026:61884. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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