How severe is CVE-2023-40078?

CVE-2023-40078 has a CVSS 3.x base score of 9.8, 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 high, and availability high.

Is CVE-2023-40078 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40078?

CVE-2023-40078 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40078?

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-2023-40078 published?

CVE-2023-40078 was published on 2023-12-04 and last updated on 2026-06-17.

CVE-2023-40078

CVE-2023-40078 is a critical-severity vulnerability in Google Android with a CVSS 3.x base score of 9.8. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Google Android
Published: 2023-12-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-40078?: 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.
How severe is CVE-2023-40078?: CVE-2023-40078 has a CVSS 3.x base score of 9.8, 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 high, and availability high.
Is CVE-2023-40078 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40078?: CVE-2023-40078 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40078?: 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-2023-40078 published?: CVE-2023-40078 was published on 2023-12-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*

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