Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
md/bitmap: fix GPF in write_page caused by resize race
A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b/0x3c0 [md_mod]
This is a use-after-free race between bitmap_daemon_work() and
__bitmap_resize(). The daemon iterates over bitmap->storage.filemap
without locking, while the resize path frees that storage via
md_bitmap_file_unmap(). quiesce() does not stop the md thread,
allowing concurrent access to freed pages.
Fix by holding mddev->bitmap_info.mutex during the bitmap update.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 7 ELS , Debian 10 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- kernel @ 3.10.0 (+16 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 10 | Released |
50 kernels
|
| AlmaLinux 9 | Released |
106 kernels
|
| AlmaLinux 9.2 ESU | Released |
21 kernels
|
| AlmaLinux 9.6 ESU | Released |
9 kernels
|
| Amazon Linux 2023 | Planned | — |
| CentOS 7 | Released |
35 kernels
|
| CentOS 7 ELS | In Rollout |
34 kernels
|
| CentOS 7 plus | Released |
23 kernels
|
| Debian 11 | Released |
37 kernels
|
| Debian 11 cloud | Released |
17 kernels
|
| Debian 13 | Planned | — |
| Oracle Linux 10 | Released |
36 kernels
|
| Oracle Linux 9 | Released |
109 kernels
|
| RHEL 10 | Released |
49 kernels
|
| RHEL 7 | Released |
56 kernels
|
| RHEL 8 | Ready For Release | — |
| RHEL 9 | Released |
104 kernels
|
| Rocky Linux 10 | Released |
33 kernels
|
| Rocky Linux 9 | Released |
85 kernels
|
| Ubuntu 22.04 | Planned | — |
| Ubuntu 24.04 | Released |
45 kernels
|
| Ubuntu 24.04 AWS | Planned | — |