Security readout for executives and security teams
Plain-English summary
This is a Linux kernel bug in the Intel iavf virtual network driver. During VF removal and channel changes, the driver can use a queue count larger than the allocated ring arrays, causing an out-of-bounds read. The public record does not show active exploitation or a CVSS score.
Executive priority
Treat this as targeted infrastructure risk, not a broad internet emergency. Patch during the next kernel maintenance cycle, sooner for virtualization, NFV, lab, or cloud hosts that frequently create and remove SR-IOV virtual functions.
Technical view
CVE-2023-53659 affects the Linux kernel iavf driver. The issue occurs when channel settings change during iavf_remove() and reset waiting times out, directly changing num_active_queues beyond allocated tx/rx ring arrays. The supplied trace shows KASAN slab-out-of-bounds in iavf_free_all_tx_resources during SR-IOV VF teardown.
Likely exposure
Exposure is most likely on Linux systems using Intel iavf virtual functions with SR-IOV workflows. The reproducer uses privileged host operations, sysfs SR-IOV changes, and ethtool channel changes, so typical internet-facing application exposure is not indicated by the sources.
Exploitation context
The source bundle includes a reproducer and kernel crash trace, but KEV is false and no cited source reports exploitation in the wild. The practical risk is operational disruption or kernel memory-safety impact in systems where privileged users or automation manage SR-IOV VFs.
Researcher notes
The evidence is limited to the CVE record and Linux stable references. The record identifies fixed commits but does not provide CVSS, CWE, exploit status, or a full affected distribution matrix. Validate through kernel package advisories, not upstream commit hashes alone.
Mitigation direction
- Review kernel vendor advisories for CVE-2023-53659 and iavf fixes.
- Update affected Linux kernels to versions containing the referenced stable commits.
- Prioritize hosts using Intel iavf, i40e, and SR-IOV virtual functions.
- Restrict privileged access to SR-IOV and network channel configuration paths.
- Monitor for kernel OOB, KASAN, or iavf removal errors.
Validation and detection
- Inventory Linux hosts with iavf driver loaded or Intel SR-IOV VFs enabled.
- Compare running kernel versions against vendor-fixed kernel packages or stable commits.
- Check dmesg or centralized logs for iavf_remove and slab-out-of-bounds reports.
- Confirm only trusted administrators can modify sriov_numvfs and ethtool channels.
- Track remediation through kernel package version and reboot verification.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2023-53659 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/b92defe4e8ee86996c16417ad8c804cb4395fdddCVE reference, Linux
- https://git.kernel.org/stable/c/0fb37ce6c01e17839e26d03222f0b44e6a3ed2b9CVE reference, Linux
- https://git.kernel.org/stable/c/6e1d8f1332076a002e6d910d255aa5903d341c56CVE reference, Linux
- https://git.kernel.org/stable/c/65ecebc9ac09427b2c65f271cd5e5bd536c3fe38CVE reference, Linux
- https://git.kernel.org/stable/c/7c4bced3caa749ce468b0c5de711c98476b23a52CVE 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.