Red Hat: CVE-2022-48757: kernel: net: fix information leakage in /proc/net/ptype (Multiple Advisories)

Red Hat: CVE-2022-48757: kernel: net: fix information leakage in /proc/net/ptype (Multiple Advisories)

Severity

2

CVSS

(AV:L/AC:L/Au:S/C:P/I:N/A:N)

Published

06/20/2024

Created

08/13/2024

Added

08/12/2024

Modified

09/13/2024

Description

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.

Solution(s)

• redhat-upgrade-kernel
• redhat-upgrade-kernel-rt

References

• CVE-2022-48757
• RHSA-2024:5101
• RHSA-2024:5102
• RHSA-2024:6206