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PatchSiren cyber security CVE debrief

CVE-2026-38971 Ardupilot CVE debrief

CVE-2026-38971 is a critical vulnerability in Arduplane, an autopilot system for unmanned aerial vehicles (UAVs). The vulnerability is caused by an out-of-bounds read issue in the GCS_MAVLink library, specifically in the handle_serial_control() function. This issue may allow an attacker to read sensitive data or cause a denial of service. The vulnerability has a CVSS score of 9.1 and is considered critical. Users of Arduplane 4.6.3 and prior versions should be aware of this vulnerability and take steps to mitigate it. This includes updating to a patched version of the software, if available, and implementing compensating controls to detect and prevent exploitation.

Vendor
Ardupilot
Product
Arduplane
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-02
Original CVE updated
2026-07-08
Advisory published
2026-07-02
Advisory updated
2026-07-08

Who should care

Users of Arduplane 4.6.3 and prior versions should be aware of this vulnerability and take steps to mitigate it. This includes updating to a patched version of the software, if available, and implementing compensating controls to detect and prevent exploitation. Operators, platform administrators, vulnerability management teams, and security teams should review the vulnerability and take necessary actions to protect their systems.

Technical summary

The vulnerability is caused by an out-of-bounds read issue in the GCS_MAVLink library, specifically in the handle_serial_control() function. This issue may allow an attacker to read sensitive data or cause a denial of service. The vulnerability has a CVSS score of 9.1 and is considered critical. The affected product is Arduplane 4.6.3 and prior versions. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Defensive priority

High

Recommended defensive actions

  • Update to a patched version of Arduplane, if available
  • Implement compensating controls to detect and prevent exploitation
  • Monitor system logs for suspicious activity
  • Restrict access to the system and its components
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-02T21:16:56.253Z and was last modified on 2026-07-08T18:45:12.220Z. The NVD entry is currently Analyzed. The vulnerability is caused by an out-of-bounds read issue in the GCS_MAVLink library, specifically in the handle_serial_control() function. This issue may allow an attacker to read sensitive data or cause a denial of service. However, the CVE record has limited information about the vulnerability, and defenders should verify the affected scope and severity with the vendor or other reliable sources.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-02T21:16:56.253Z and has not been modified since then. The NVD entry is currently Analyzed.