Is CVE-2023-40078 being actively exploited?

CVE-2023-40078 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2023-40078?

CVE-2023-40078 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2023-40078

CRITICAL · CVSS 9.8EPSS 0.5%EU EUVD

In a2dp_vendor_opus_decoder_decode_packet of a2dp_vendor_opus_decoder.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to paired device escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 0.5% (43th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2023-44685)
Published: December 4, 2023
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2023-44685 in the EU Vulnerability Database. Last updated in EUVD on August 2, 2024.

View on the EU Vulnerability Database

Affected products

google / android

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Google Pixel Devices on Android 14 - Google LLC - Common Criteria CCEVS-VR-VID-11419-2024 - archived

References

https://android.googlesource.com/platform/packages/modules/Bluetooth/+/6cdf985a664476659b84d8c74698cb3dfa28f82b(Mailing List, Patch)
https://source.android.com/security/bulletin/2023-12-01(Patch, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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