Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
NFS: Fix a race when updating an existing write
After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothing prevents a call to nfs_inode_remove_request() from succeeding until we actually lock the page group. The reason is that whoever called nfs_inode_remove_request() doesn’t necessarily have a lock on the page group head.
So in order to avoid races, let’s take the page group lock earlier in nfs_lock_and_join_requests(), and hold it across the removal of the request in nfs_inode_remove_request().
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 , Oracle Linux 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- kernel @ 5.10.0 (+10 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 10 | Released |
12 kernels
|
| AlmaLinux 8 | Released |
84 kernels
|
| AlmaLinux 9 | Released |
80 kernels
|
| AlmaLinux 9.2 ESU | Released |
12 kernels
|
| AlmaLinux 9.6 ESU | Ready For Release | — |
| Amazon Linux 2023 | Planned | — |
| CentOS 8 | Released |
33 kernels
|
| CloudLinux OS 7h | Released |
93 kernels
|
| CloudLinux OS 8 | Released |
90 kernels
|
| Debian 11 | Planned | — |
| Debian 11 cloud | Planned | — |
| Debian 12 | Planned | — |
| Debian 13 | Will Not Fix | — |
| Oracle Linux 10 | Released |
12 kernels
|
| Oracle Linux 8 | Released |
110 kernels
|
| Oracle Linux 8 UEK 7 | Planned | — |
| Oracle Linux 9 | Released |
87 kernels
|
| Oracle Linux 9 UEK 7 | Planned | — |
| RHEL 10 | Released |
12 kernels
|
| RHEL 8 | Released |
105 kernels
|
| RHEL8 EUS 8.6 | Ready For Release | — |
| RHEL 9 | Released |
81 kernels
|
| Rocky Linux 10 | Released |
8 kernels
|
| Rocky Linux 8 | Released |
71 kernels
|
| Rocky Linux 9 | Released |
68 kernels
|
| Ubuntu 22.04 | Planned | — |
| Ubuntu 22.04 AWS | Planned | — |
| Ubuntu 24.04 | Planned | — |
| Ubuntu 24.04 AWS | Planned | — |