Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing
Theoretically it’s an oopsable race, but I don’t believe one can manage to hit it on real hardware; might become doable on a KVM, but it still won’t be easy to attack.
Anyway, it’s easy to deal with - since xdr_encode_hyper() is just a call of put_unaligned_be64(), we can put that under ->d_lock and be done with that.
Details
- Affected product:
- Oracle Linux 7 ELS , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 5.4.0 (+2 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Amazon Linux 2023 | Planned | — |
| Debian 12 | Released |
32 kernels
|
| Debian 13 | Will Not Fix | — |
| Oracle Linux 7 UEK 6 | Released |
112 kernels
|
| Oracle Linux 8 UEK 6 | Released |
143 kernels
|
| Oracle Linux 8 UEK 7 | Released |
83 kernels
|
| Oracle Linux 9 UEK 7 | Released |
83 kernels
|
| Proxmox VE 7 5.15 | Released |
47 kernels
|
| Ubuntu 20.04 HWE AWS | Released |
57 kernels
|
| Ubuntu 20.04 HWE Azure | Released |
40 kernels
|
| Ubuntu 22.04 | Released |
90 kernels
|
| Ubuntu 22.04 AWS | Released |
81 kernels
|
| Ubuntu 22.04 Azure | Released |
73 kernels
|
| Ubuntu 24.04 | Released |
39 kernels
|
| Ubuntu 24.04 AWS | Planned | — |