CVE-2022-48757: Linux Kernel

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: net: fix information leakage in /proc/net/ptype In one net namespace, after creating a packet socket without binding it to a device, users in other net namespaces can observe the new `packet_type` added by this packet socket by reading `/proc/net/ptype` file. This is minor information leakage as packet socket is namespace aware. Add a net pointer in `packet_type` to keep the net namespace of of corresponding packet socket. In `ptype_seq_show`, this net pointer must be checked when it is not NULL.

Affected products

• Linux Linux Kernel: from 2.6.26, before 4.4.302 (fixed in 4.4.302); from 4.5, before 4.9.300 (fixed in 4.9.300); from 4.10, before 4.14.265 (fixed in 4.14.265); from 4.15, before 4.19.228 (fixed in 4.19.228); from 4.20, before 5.4.176 (fixed in 5.4.176); from 5.5, before 5.10.96 (fixed in 5.10.96); …

Published 2024-06-20. Last modified 2026-06-17.