Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
udp: fix potential use-after-free in tunnel segmentation
__skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no longer valid.
Get the UDP header after the pull to avoid a potential use-after-free.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 7 ELS , Debian 10 ELS , Debian 11 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 4.19.0 (+16 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 10 | In Rollout |
73 kernels
|
| AlmaLinux 9.2 ESU | Released |
35 kernels
|
| AlmaLinux 9.6 ESU | In Rollout |
20 kernels
|
| CentOS 7 ELS | Released |
37 kernels
|
| Debian 12 | Released |
43 kernels
|
| Debian 13 | Released |
15 kernels
|
| Oracle Linux 10 | In Rollout |
57 kernels
|
| Oracle Linux 8 UEK 7 | Released |
112 kernels
|
| Oracle Linux 9 UEK 7 | Released |
112 kernels
|
| RHEL 10 | In Rollout |
74 kernels
|
| RHEL 7 | In Progress | — |
| RHEL 8 | Planned | — |
| RHEL 9 | Planned | — |
| Rocky Linux 10 | In Rollout |
56 kernels
|
| Ubuntu 22.04 | Planned | — |
| Ubuntu 22.04 AWS | Planned | — |
| Ubuntu 22.04 Azure | Planned | — |