What is CVE-2026-53236?

CVE-2026-53236 is a unscored severity Linux kernel vulnerability. CVE-2026-53236 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53236?

CVE-2026-53236 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-53236?

No patch is currently available for CVE-2026-53236. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2026-53236 actively exploited?

CVE-2026-53236 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53236

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.

Package Linux Kernel

Published 2026-06-25

Last modified 2026-06-25

Patch available

Awaiting data