Overview
About vulnerability
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.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 6 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 6 ELS , CloudLinux 7 ELS , Debian 10 ELS , Oracle Linux 6 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 4.4.0 (+18 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | Released |
43 kernels
|
| Amazon Linux 2 | Planned | — |
| Amazon Linux 2 5.10 | Will Not Fix | — |
| Amazon Linux 2 5.4 | Will Not Fix | — |
| CentOS 7 ELS | Released |
20 kernels
|
| CentOS 8 | Released |
33 kernels
|
| CloudLinux OS 7h | Released |
58 kernels
|
| CloudLinux OS 8 | Released |
54 kernels
|
| Debian 10 | Planned | — |
| Debian 11 | Planned | — |
| Oracle Linux 8 | Released |
67 kernels
|
| RHEL 8 | Released |
64 kernels
|
| Rocky Linux 8 | Released |
37 kernels
|
| Ubuntu 18.04 | Will Not Fix | — |
| Ubuntu 18.04 AWS Focal | Planned | — |
| Ubuntu 20.04 | Planned | — |