Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
exfat: fix the infinite loop in exfat_readdir()
If the file system is corrupted so that a cluster is linked to itself in the cluster chain, and there is an unused directory entry in the cluster, ‘dentry’ will not be incremented, causing condition ‘dentry < max_dentries’ unable to prevent an infinite loop.
This infinite loop causes s_lock not to be released, and other tasks will hang, such as exfat_sync_fs().
This commit stops traversing the cluster chain when there is unused directory entry in the cluster to avoid this infinite loop.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , TuxCare 9.6 ESU
- Affected packages:
- kernel @ 5.10.0 (+3 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 9 | Released |
50 kernels
|
| AlmaLinux 9.2 ESU | Released |
23 kernels
|
| Amazon Linux 2023 | Planned | — |
| Debian 11 | Planned | — |
| Debian 11 cloud | Planned | — |
| Debian 12 | Planned | — |
| Oracle Linux 9 | Released |
56 kernels
|
| Proxmox VE 7 5.15 | Released |
47 kernels
|
| RHEL 9 | Released |
50 kernels
|
| Rocky Linux 9 | Released |
49 kernels
|
| Ubuntu 20.04 HWE AWS | Released |
52 kernels
|
| Ubuntu 20.04 HWE Azure | Released |
36 kernels
|
| Ubuntu 22.04 | Released |
69 kernels
|
| Ubuntu 22.04 AWS | Released |
60 kernels
|
| Ubuntu 22.04 Azure | Released |
56 kernels
|
| Ubuntu 24.04 | Released |
22 kernels
|
| Ubuntu 24.04 AWS | Ready For Release | — |