CVE-2022-48757

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.

• linux linux kernel (>= 2.6.26 < 4.4.302) • linux linux kernel (>= 4.5 < 4.9.300) • linux linux kernel (>= 4.10 < 4.14.265) • linux linux kernel (>= 4.15 < 4.19.228) • linux linux kernel (>= 4.20 < 5.4.176) • linux linux kernel (>= 5.5 < 5.10.96) • linux linux kernel (>= 5.11 < 5.15.19) • linux linux kernel (>= 5.16 < 5.16.5) • linux linux kernel 5.17