Security Advisory

CVE-2026-53236

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-25 08:39:33

Last updated 2026-06-25 08:39:33

Assigner Linux

CVSS score not scored

State PUBLISHED

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: restrict SO_ATTACH_FILTER to priv users This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capability. This blocks potential side-channel attack where an unprivileged application attaches a filter to leak TCP sequence/acknowledgment numbers.

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