Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: protect references to superblock parameters exposed in sysfs
The superblock buffers of nilfs2 can not only be overwritten at runtime for modifications/repairs, but they are also regularly swapped, replaced during resizing, and even abandoned when degrading to one side due to backing device issues. So, accessing them requires mutual exclusion using the reader/writer semaphore “nilfs->ns_sem”.
Some sysfs attribute show methods read this superblock buffer without the necessary mutual exclusion, which can cause problems with pointer dereferencing and memory access, so fix it.
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 , TuxCare 9.8 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- kernel-uek @ 5.4.17 (+12 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Amazon Linux 2 | Released |
120 kernels
|
| Amazon Linux 2 5.10 | Will Not Fix | — |
| Amazon Linux 2 5.4 | Will Not Fix | — |
| Debian 11 | Released |
32 kernels
|
| Debian 11 cloud | Released |
12 kernels
|
| Debian 12 | Released |
16 kernels
|
| Oracle Linux 7 UEK 5 | Will Not Fix | — |
| Oracle Linux 7 UEK 6 | Released |
108 kernels
|
| Oracle Linux 8 UEK 6 | Released |
109 kernels
|
| Oracle Linux 8 UEK 7 | Released |
45 kernels
|
| Oracle Linux 9 UEK 7 | Released |
45 kernels
|
| Proxmox VE 7 5.15 | Released |
47 kernels
|
| Ubuntu 16.04 AWS ESM | Will Not Fix | — |
| Ubuntu 16.04 AWS HWE ESM | Will Not Fix | — |
| Ubuntu 16.04 Azure ESM | Will Not Fix | — |
| Ubuntu 16.04 ESM | Will Not Fix | — |
| Ubuntu 16.04 GCP ESM | Will Not Fix | — |
| Ubuntu 16.04 HWE ESM | Will Not Fix | — |
| Ubuntu 18.04 | Will Not Fix | — |
| Ubuntu 18.04 HWE Focal | Will Not Fix | — |
| Ubuntu 20.04 | Planned | — |
| Ubuntu 20.04 AWS | Will Not Fix | — |
| Ubuntu 20.04 GCP | Planned | — |
| Ubuntu 20.04 HWE AWS | Released |
48 kernels
|
| Ubuntu 20.04 HWE Azure | Released |
31 kernels
|
| Ubuntu 22.04 | Released |
61 kernels
|
| Ubuntu 22.04 AWS | Released |
55 kernels
|
| Ubuntu 22.04 Azure | Released |
51 kernels
|
| Ubuntu 24.04 | Released |
12 kernels
|