Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix race with concurrent opens in rename(2)
Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all existing open handles as deleted to prevent them from deferring closes, which increases the race window for potential concurrent opens on the target file.
Fix this by unhashing the dentry in advance to prevent any concurrent opens on the target.
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 @ 5.14.0 (+4 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 8 | Released |
85 kernels
|
| AlmaLinux 9.2 ESU | Released |
8 kernels
|
| Amazon Linux 2023 | Planned | — |
| CentOS 8 | Released |
33 kernels
|
| CloudLinux OS 7h | Released |
93 kernels
|
| CloudLinux OS 8 | Released |
90 kernels
|
| Debian 12 | Released |
30 kernels
|
| Debian 13 | Will Not Fix | — |
| Oracle Linux 8 | Released |
111 kernels
|
| RHEL 8 | Released |
106 kernels
|
| RHEL8 EUS 8.6 | Released |
55 kernels
|
| RHEL 9 | Planned | — |
| Rocky Linux 8 | Released |
72 kernels
|
| Ubuntu 24.04 | Released |
39 kernels
|
| Ubuntu 24.04 AWS | Planned | — |