MEDIUM

CVE-2026-53236

Linux Linux Kernel 2026-06-25 CVSS v3.1

CVSS

5.5

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.

EPSS Score

0.12%

Probability of exploitation in next 30 days

2.3th percentile

References

https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a Patch https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2 Patch https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07 Patch https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1 Patch https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba Patch https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9 Patch https://cert-portal.siemens.com/productcert/html/ssa-019113.html

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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