Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.12.1, < 6.1.176 |
References
- https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6aPatch
- https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2Patch
- https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07Patch
- https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1Patch
- https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51baPatch
- https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9Patch
FAQ
What is CVE-2026-53236?
CVE-2026-53236 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ...
How severe is CVE-2026-53236?
CVE-2026-53236 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53236?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.