Security readout for executives and security teams
Plain-English summary
This is a high-severity Linux kernel flaw in FPGA DFL AFU memory-region handling. A local user could trigger an integer overflow that may compromise confidentiality, integrity, and availability. Business urgency is highest for Linux systems or appliances that expose the affected FPGA subsystem or ship vendor kernels carrying this code.
Executive priority
Treat as a targeted high-priority kernel update item, not an internet-wide emergency. Prioritize regulated, multi-user, appliance, or shared compute environments where local privilege boundaries matter and FPGA functionality may be present.
Technical view
CVE-2023-26242 is a CWE-190 integer overflow in afu_mmio_region_get_by_offset in drivers/fpga/dfl-afu-region.c, reported for Linux kernel versions through 6.1.12. The CVSS vector is local, low complexity, low privileges, no user interaction, with high CIA impact.
Likely exposure
Exposure appears limited to systems running affected Linux kernels where the FPGA DFL AFU code path is present and reachable by a local low-privileged user. The bundle does not provide complete affected product, distribution, or appliance version lists.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates local exploitation with low privileges and no user interaction, but no public exploit status is established by the provided sources.
Researcher notes
Key uncertainty is exposure scope: the CVE record names the kernel file and version boundary, while the affected product list in the bundle is not populated. Validate reachability against actual kernel configuration, hardware, and vendor backports before assigning asset risk.
Mitigation direction
- Apply vendor kernel updates that include the upstream fix when available.
- Check NetApp and SUSE guidance for affected product-specific remediation.
- Prioritize systems with FPGA DFL or AFU functionality enabled.
- If unused, assess vendor-supported ways to disable FPGA DFL AFU exposure.
- Track kernel package status for versions newer than 6.1.12.
Validation and detection
- Inventory Linux kernel versions and flag systems at or below 6.1.12.
- Identify hosts or appliances using FPGA DFL AFU-related kernel functionality.
- Confirm vendor advisory status for NetApp, SUSE, and other deployed distributions.
- Verify remediation through vendor package metadata or kernel changelogs.
- Document any systems requiring compensating controls pending updates.
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.
CWE-190: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-26242 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.