Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack()
The timestamp-only fast path dereferences the option stream as *(__be32 *)ptr, which assumes 4-byte alignment that the TCP option stream does not guarantee. Use get_unaligned_be32() instead, which reads the value safely and already returns host byte order, so the htonl() on the comparison constant can be dropped.
This matches the existing get_unaligned_be32() use later in the same function.
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 7 ELS , Debian 10 ELS , Debian 11 ELS , Oracle Linux 6 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 @ 5.4.0 (+19 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | Will Not Fix |
139 kernels
|
| AlmaLinux 9 | Released |
139 kernels
|
| AlmaLinux 9.2 ESU | Planned | — |
| CentOS 8 | Will Not Fix |
33 kernels
|
| CloudLinux OS 7h | Will Not Fix |
120 kernels
|
| CloudLinux OS 8 | Will Not Fix |
115 kernels
|
| Debian 12 | Planned | — |
| Debian 13 | Planned | — |
| Oracle Linux 8 | Will Not Fix |
154 kernels
|
| Oracle Linux 9 | Released |
138 kernels
|
| RHEL 8 | Will Not Fix |
155 kernels
|
| RHEL 9 | Released |
137 kernels
|
| Rocky Linux 8 | Will Not Fix |
115 kernels
|
| Rocky Linux 9 | Released |
114 kernels
|