Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: publish GC-visible tuple last
nf_flow_table_iterate() only treats original-direction tuple nodes as owning entries. Publishing the original node first lets GC observe and free a flow while flow_offload_add() is still inserting the reply node. Publish the reply node first and the original node last so GC never sees a partially installed flow.
KASAN can trigger slab-use-after-free read and write reports in the flowtable/rhashtable path (rht_deferred_worker, jhash, flow_offload_del, flow_offload_lookup, etc.).
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , Debian 10 ELS , Debian 11 ELS , Oracle Linux 7 ELS , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 4.19.0 (+10 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | Released |
139 kernels
|
| AlmaLinux 9 | Released |
139 kernels
|
| AlmaLinux 9.2 ESU | Released |
35 kernels
|
| AlmaLinux 9.6 ESU | In Rollout |
20 kernels
|
| CentOS 8 | Released |
33 kernels
|
| CloudLinux OS 7h | Released |
120 kernels
|
| CloudLinux OS 8 | Released |
115 kernels
|
| Debian 12 | Released |
43 kernels
|
| Oracle Linux 8 | Released |
154 kernels
|
| Oracle Linux 8 UEK 7 | Released |
112 kernels
|
| Oracle Linux 9 | Released |
138 kernels
|
| Oracle Linux 9 UEK 7 | Released |
112 kernels
|
| RHEL 8 | Released |
155 kernels
|
| RHEL 9 | Released |
137 kernels
|
| Rocky Linux 8 | Released |
115 kernels
|
| Rocky Linux 9 | Released |
114 kernels
|