Security readout for executives and security teams
Plain-English summary
This is a Linux kernel irdma driver flaw where the driver can request more MSI-X interrupt vectors than online CPUs support, triggering a kernel warning during driver initialization. The evidence points to reliability or operational noise rather than confirmed data theft or remote compromise.
Executive priority
Treat this as a targeted kernel maintenance item, not an emergency. Patch affected RDMA-capable Linux hosts through normal update channels, with higher priority for production systems where driver initialization warnings could disrupt operations or monitoring.
Technical view
In the RDMA irdma driver, MSI-X vector usage was not capped at num_online_cpus() + 1. When exceeded, affinity hint handling could use an invalid CPU mask and produce a kernel warning in irdma_cfg_ceq_vector during probe or hardware initialization. Stable kernel commits cap the value.
Likely exposure
Exposure appears limited to Linux systems using the irdma RDMA driver, typically with supported Intel RDMA-capable networking. Generic Linux servers not loading this driver are unlikely to be affected based on the provided evidence.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of active exploitation, public exploit tooling, privilege escalation, or remote attack. The described behavior is a kernel warning during driver setup when vector counts exceed the supported CPU-based limit.
Researcher notes
The record lacks CVSS, CWE, and exploit detail. Analysis should focus on the irdma MSI-X vector cap, affected Linux kernel ranges or commit ancestry, and whether downstream distributions have backported the stable fix.
Mitigation direction
- Apply a Linux kernel update containing the referenced stable irdma fix.
- Use distribution vendor kernel advisories to map the fix to packaged kernel versions.
- If irdma is unnecessary, avoid enabling or loading the driver until updated.
- Prioritize RDMA-capable production hosts where kernel warnings affect reliability monitoring.
Validation and detection
- Inventory Linux hosts that load or depend on the irdma driver.
- Confirm the running kernel includes one of the referenced stable commits or a vendor backport.
- Review kernel logs for irdma_cfg_ceq_vector or cpumask warnings during driver probe.
- Check RDMA-capable network hosts before general-purpose Linux systems.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2023-53811 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/87674a359ad173a3b8cd484e92e4f1901666da4cCVE reference, Linux
- https://git.kernel.org/stable/c/b3bd44bf20cb3a6a47aa4373e1817147efb4be04CVE reference, Linux
- https://git.kernel.org/stable/c/209e4aa9a7b636d8aaa1297e1d089ee2ed91d73fCVE reference, Linux
- https://git.kernel.org/stable/c/9cd9842c46996ef62173c36619c746f57416bcb0CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.