Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
NFSv4.0: Fix a use-after-free problem in the asynchronous open()
Yang Erkun reports that when two threads are opening files at the same time, and are forced to abort before a reply is seen, then the call to nfs_release_seqid() in nfs4_opendata_free() can result in a use-after-free of the pointer to the defunct rpc task of the other thread. The fix is to ensure that if the RPC call is aborted before the call to nfs_wait_on_sequence() is complete, then we must call nfs_release_seqid() in nfs4_open_release() before the rpc_task is freed.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 6 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 6 ELS , CloudLinux 7 ELS , Debian 10 ELS , Oracle Linux 6 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:
- linux-meta @ 4.4.0 (+21 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 9 | Released |
50 kernels
|
| Amazon Linux 2 | Released |
104 kernels
|
| Amazon Linux 2023 | Planned | — |
| Amazon Linux 2 5.10 | Will Not Fix | — |
| Amazon Linux 2 5.4 | Will Not Fix | — |
| CentOS 7 ELS | Released |
11 kernels
|
| Debian 11 | Released |
33 kernels
|
| Debian 11 cloud | Released |
13 kernels
|
| Debian 12 | Planned | — |
| Oracle Linux 7 UEK 6 | Released |
112 kernels
|
| Oracle Linux 8 UEK 6 | Released |
116 kernels
|
| Oracle Linux 8 UEK 7 | Released |
53 kernels
|
| Oracle Linux 9 | Released |
56 kernels
|
| Oracle Linux 9 UEK 7 | Released |
53 kernels
|
| RHEL 9 | Released |
50 kernels
|
| Rocky Linux 9 | Released |
49 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 AWS Focal | Will Not Fix | — |
| Ubuntu 20.04 | Ready For Release | — |
| Ubuntu 22.04 | In Progress | — |
| Ubuntu 22.04 AWS | In Progress | — |
| Ubuntu 22.04 Azure | In Progress | — |
| Ubuntu 24.04 | Released |
20 kernels
|
| Ubuntu 24.04 AWS | Ready For Release | — |