High [CVE-2026-47783] Username enumeration via timing side channel
This high-severity Red Hat Linux advisory covers CVE-2026-47783 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6.
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Summary
Username enumeration via timing side channel. Red Hat rates this important (CVSS 8.1).
Weakness: CWE-208. Affected package(s): memcached.
Resolved in Red Hat advisory RHSA-2026:27862 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 1 more.
- memcached-0:1.6.9-7.el9_8.1
- memcached-0:1.6.23-7.el10_2.1
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:27862
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-2026:27862 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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