CVE-2020-3680

Unspecified local impact via FastRPC mapping race

Published Jun 2, 2020 · Updated Aug 4, 2024

A TOCTOU race in the FastRPC memory-mapping API on affected Qualcomm Snapdragon chipsets allows local users to cause unspecified impact. The API can use mapping state after a concurrent change invalidates an earlier check, but Qualcomm has not disclosed the affected function or resulting memory operation. A low-privileged local process must win the race, and the public record does not further bound the resulting effect.

CVSS severity7.0
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A TOCTOU race in the FastRPC memory-mapping API on affected Qualcomm Snapdragon chipsets allows local users to cause unspecified impact. The API can use mapping state after a concurrent change invalidates an earlier check, but Qualcomm has not disclosed the affected function or resulting memory operation. A low-privileged local process must win the race, and the public record does not further bound the resulting effect.

The record

CVE
CVE-2020-3680
Published
Jun 2, 2020
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-367, CAPEC-29
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=APQ8009, APQ8053, MSM8909W, MSM8917, MSM8953, QCS605, QM215, SA415M, SDM429, SDM429W, SDM439, SDM450, SDM632, SDM670, SDM710, SDM845, SDX24, SXR1130

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8053, MSM8909W, MSM8917, MSM8953, QCS605, QM215, SA415M, SDM429, SDM429W, SDM439, SDM450, SDM632, SDM670, SDM710, SDM845, SDX24, SXR1130

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6.9NIST NVDAV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC-29Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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