Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
ipvs: do not propagate one-packet flag to synced conns
Synced connections can be created before their destination exists. When the destination is later added, ip_vs_bind_dest() copies connection flags from the destination into cp->flags.
IP_VS_CONN_F_ONE_PACKET connections are not synced. If a synced connection inherits IP_VS_CONN_F_ONE_PACKET while it is already hashed, expiry can treat it as a one-packet connection and skip unlinking the existing conn_tab node, leaving stale hash nodes pointing at a freed struct ip_vs_conn.
Drop IP_VS_CONN_F_ONE_PACKET from destination flags when binding synced connections.
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 @ 5.10.269 (+19 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 10 | Released |
69 kernels
|
| AlmaLinux 8 | Released |
136 kernels
|
| AlmaLinux 9 | Released |
136 kernels
|
| CentOS 8 | Released |
33 kernels
|
| CloudLinux OS 7h | Released |
119 kernels
|
| CloudLinux OS 8 | Released |
114 kernels
|
| Debian 12 | Released |
43 kernels
|
| Oracle Linux 10 | Released |
53 kernels
|
| Oracle Linux 8 | Released |
152 kernels
|
| Oracle Linux 8 UEK 7 | Released |
112 kernels
|
| Oracle Linux 9 | Released |
135 kernels
|
| Oracle Linux 9 UEK 7 | Released |
112 kernels
|
| RHEL 10 | Released |
70 kernels
|
| RHEL 8 | Released |
152 kernels
|
| RHEL 9 | Released |
134 kernels
|
| Rocky Linux 10 | Released |
53 kernels
|
| Rocky Linux 8 | Released |
112 kernels
|
| Rocky Linux 9 | Released |
111 kernels
|
| Ubuntu 22.04 | Planned | — |
| Ubuntu 22.04 AWS | Planned | — |
| Ubuntu 22.04 Azure | Planned | — |