CVE-2022-48757
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.
How to fix
- linux linux_kernel4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.26 ≤ v < 4.4.302, 4.5 ≤ v < 4.9.300, 4.10 ≤ v < 4.14.265, 4.15 ≤ v < 4.19.228, 4.20 ≤ v < 5.4.176, 5.5 ≤ v < 5.10.96, 5.11 ≤ v < 5.15.19, 5.16 ≤ v < 5.16.5, 5.17 | 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5 |
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