How severe is CVE-2020-3691?

CVE-2020-3691 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-2020-3691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3691?

CVE-2020-3691 primarily affects Qualcomm Apq8009. In total, 506 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3691?

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-2020-3691 published?

CVE-2020-3691 was published on 2021-01-21 and last updated on 2026-06-17.

CVE-2020-3691

CVE-2020-3691 is a critical-severity vulnerability in Qualcomm Apq8009 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-191.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-191
Affected product: Qualcomm Apq8009
Published: 2021-01-21
Last modified: 2026-06-17

Description

Possible out of bound memory access in audio due to integer underflow while processing modified contents in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

Frequently asked questions

What is CVE-2020-3691?: Possible out of bound memory access in audio due to integer underflow while processing modified contents in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking
How severe is CVE-2020-3691?: CVE-2020-3691 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-2020-3691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3691?: CVE-2020-3691 primarily affects Qualcomm Apq8009. In total, 506 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3691?: 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-2020-3691 published?: CVE-2020-3691 was published on 2021-01-21 and last updated on 2026-06-17.

References

Affected products (506)

cpe:2.3:h:qualcomm:apq8009:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8009w:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8017:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8030:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8037:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8052:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8053:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8056:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8060a:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8062:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8064:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8064au:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8076:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8084:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:apq8096au:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:aqt1000:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:ar6003:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:ar8031:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:ar8035:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:ar8151:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:ar9374:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:csra6620:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:csra6640:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:csrb31024:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm8215:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm8215m:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm8615m:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm8635m:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9206:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9215:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9225:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9225m:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9230:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9235m:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9310:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9330:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9607:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9615:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9615m:-:*:*:*:*:*:*:*
cpe:2.3:h:qualcomm:mdm9625:-:*:*:*:*:*:*:*

More vulnerabilities in Qualcomm Apq8009

CVE-2020-11283 — Critical (CVSS 9.8): A buffer overflow can occur when playing an MKV clip due to lack of input validation in Snapdragon Auto, Snapdragon…
CVE-2020-3686 — Critical (CVSS 9.8): Possible memory out of bound issue during music playback when an incorrect bit stream content is copied into array…
CVE-2020-11216 — Critical (CVSS 9.8): Buffer over read can happen in video driver when playing clip with atomsize having value UINT32_MAX in Snapdragon Auto,…
CVE-2020-11213 — Critical (CVSS 9.8): Out of bound reads might occur in while processing Service descriptor due to improper validation of length of fields in…
CVE-2020-11212 — Critical (CVSS 9.8): Out of bounds reads while parsing NAN beacons attributes and OUIs due to improper length of field check in Snapdragon…
CVE-2020-11197 — Critical (CVSS 9.8): Possible integer overflow can occur when stream info update is called when total number of streams detected are zero…

All CVEs affecting Qualcomm Apq8009 →

Other CWE-191 (Integer Underflow) vulnerabilities

CVE-2007-0063 — Critical (CVSS 10.0): Integer underflow in the DHCP server in EMC VMware Workstation before 5.5.5 Build 56455 and 6.x before 6.0.1 Build…
CVE-2026-53176 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: IB/isert: Reject login PDUs shorter than…
CVE-2026-37534 — Critical (CVSS 9.8): Integer underflow vulnerability in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b345bdfe (2025-11-30) in…
CVE-2025-52471 — Critical (CVSS 9.8): ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. An integer underflow vulnerability has been…
CVE-2025-29909 — Critical (CVSS 9.8): CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures…
CVE-2024-47606 — Critical (CVSS 9.8): GStreamer is a library for constructing graphs of media-handling components. An integer underflow has been detected in…

Browse all CWE-191 (Integer Underflow) vulnerabilities →