Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
tcp: fix a signed-integer-overflow bug in tcp_add_backlog()
The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.
Details
- Affected product:
- AlmaLinux 9.2 ESU , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , TuxCare 9.6 ESU
- Affected packages:
- kernel @ 4.18.0 (+4 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | Released |
90 kernels
|
| AlmaLinux 9.2 ESU | Released |
14 kernels
|
| Amazon Linux 2 5.10 | Planned | — |
| Amazon Linux 2 5.4 | Planned | — |
| CentOS 8 | Released |
21 kernels
|
| CloudLinux OS 7h | Released |
90 kernels
|
| CloudLinux OS 8 | Released |
89 kernels
|
| Oracle Linux 8 | Released |
103 kernels
|
| RHEL 8 | Released |
98 kernels
|
| RHEL8 EUS 8.6 | Released |
58 kernels
|
| RHEL 9 | Will Not Fix | — |
| Rocky Linux 8 | Released |
77 kernels
|
| Ubuntu 22.04 | Planned | — |