linux linux-kernel CVE-2026-53236 is a vulnerability in Linux Kernel
Published on June 25, 2026

tcp: restrict SO_ATTACH_FILTER to priv users
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.

NVD


Products Associated with CVE-2026-53236

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Affected Versions

Linux: Linux: