How severe is CVE-2026-38971?

CVE-2026-38971 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-38971 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-38971?

CVE-2026-38971 affects Ardupilot Arduplane. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-38971?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-38971 published?

CVE-2026-38971 was published on 2026-07-02 and last updated on 2026-07-08.

CVE-2026-38971

CVE-2026-38971 is a critical-severity vulnerability in Ardupilot Arduplane with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Ardupilot Arduplane
Published: 2026-07-02
Last modified: 2026-07-08

Description

ardupilot through Plane-4.6.3 was found to contain an out-of-bounds read issue in libraries/GCS_MAVLink/GCS_serial_control.cpp in GCS_MAVLINK::handle_serial_control().

Frequently asked questions

What is CVE-2026-38971?: ardupilot through Plane-4.6.3 was found to contain an out-of-bounds read issue in libraries/GCS_MAVLink/GCS_serial_control.cpp in GCS_MAVLINK::handle_serial_control().
How severe is CVE-2026-38971?: CVE-2026-38971 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-38971 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-38971?: CVE-2026-38971 affects Ardupilot Arduplane. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-38971?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-38971 published?: CVE-2026-38971 was published on 2026-07-02 and last updated on 2026-07-08.

References

Affected products (1)

cpe:2.3:a:ardupilot:arduplane:*:*:*:*:*:*:*:*

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