CVE-2023-53811
BaseFortify
Publication date: 2025-12-09
Last updated on: 2025-12-09
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| intel | irdma | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is in the Linux kernel's irdma driver, which handles RDMA (Remote Direct Memory Access) operations. The driver attempts to use more MSIX interrupt vectors than the allowed maximum, which is the number of online CPUs plus one. When this limit is exceeded, the kernel throws a warning because the driver tries to update CPU affinity with a mask that exceeds the maximum CPU IDs. The issue is fixed by capping the number of MSIX vectors to the allowed maximum.
How can this vulnerability impact me? :
The impact of this vulnerability is primarily a kernel warning triggered by the irdma driver when it tries to use too many MSIX vectors. This could potentially lead to instability or unexpected behavior in the RDMA driver or related kernel components, but no direct security impact or exploitation details are provided.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring the kernel logs for warnings related to the irdma driver exceeding the maximum number of MSIX vectors. Specifically, look for kernel warnings containing messages like: "WARNING: CPU: ... irdma_cfg_ceq_vector...". You can use the command `dmesg | grep irdma` or `journalctl -k | grep irdma` to check for such warnings in the kernel log.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update the Linux kernel to a version where the irdma driver caps the MSIX vectors to num_online_cpus() + 1, which resolves the issue. Until then, monitor kernel logs for warnings and consider disabling or unloading the irdma driver if it is not required to prevent the warning and potential instability.