Unrated severityNVD Advisory· Published Jun 26, 2026
Debian linux: In the Linux kernel, the following vulnerability has been resolved: tcp: restri…
CVE-2026-53236
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.
Affected products
1Patches
Vulnerability mechanics
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