CVE-2021-1891

A possible use-after-free occurrence in audio driver can happen when pointers are not properly handled in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

Published: 2021-05-07 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-1891 is rated Low Risk (37.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.04%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-1891

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.09% 0.04% -0.04%
2 2025-03-29 0.04% 0.09% +0.04%
3 2023-03-07 — 0.04% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1891

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.4 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.5 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2021-1891

Affected software / configurations for CVE-2021-1891

Vendor Product Version Raw CPE
qualcomm apq8009w_firmware — cpe:2.3:o:qualcomm:apq8009w_firmware:-:*:*:*:*:*:*:*
qualcomm apq8017_firmware — cpe:2.3:o:qualcomm:apq8017_firmware:-:*:*:*:*:*:*:*
qualcomm apq8053_firmware — cpe:2.3:o:qualcomm:apq8053_firmware:-:*:*:*:*:*:*:*
qualcomm aqt1000_firmware — cpe:2.3:o:qualcomm:aqt1000_firmware:-:*:*:*:*:*:*:*
qualcomm ar8031_firmware — cpe:2.3:o:qualcomm:ar8031_firmware:-:*:*:*:*:*:*:*
qualcomm ar8035_firmware — cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
qualcomm ar9380_firmware — cpe:2.3:o:qualcomm:ar9380_firmware:-:*:*:*:*:*:*:*
qualcomm csr8811_firmware — cpe:2.3:o:qualcomm:csr8811_firmware:-:*:*:*:*:*:*:*
qualcomm csra6620_firmware — cpe:2.3:o:qualcomm:csra6620_firmware:-:*:*:*:*:*:*:*
qualcomm csra6640_firmware — cpe:2.3:o:qualcomm:csra6640_firmware:-:*:*:*:*:*:*:*
qualcomm csrb31024_firmware — cpe:2.3:o:qualcomm:csrb31024_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4018_firmware — cpe:2.3:o:qualcomm:ipq4018_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4028_firmware — cpe:2.3:o:qualcomm:ipq4028_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4029_firmware — cpe:2.3:o:qualcomm:ipq4029_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6000_firmware — cpe:2.3:o:qualcomm:ipq6000_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6010_firmware — cpe:2.3:o:qualcomm:ipq6010_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6018_firmware — cpe:2.3:o:qualcomm:ipq6018_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6028_firmware — cpe:2.3:o:qualcomm:ipq6028_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8064_firmware — cpe:2.3:o:qualcomm:ipq8064_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8065_firmware — cpe:2.3:o:qualcomm:ipq8065_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8068_firmware — cpe:2.3:o:qualcomm:ipq8068_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8070_firmware — cpe:2.3:o:qualcomm:ipq8070_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8070a_firmware — cpe:2.3:o:qualcomm:ipq8070a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8071_firmware — cpe:2.3:o:qualcomm:ipq8071_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8071a_firmware — cpe:2.3:o:qualcomm:ipq8071a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8072_firmware — cpe:2.3:o:qualcomm:ipq8072_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8072a_firmware — cpe:2.3:o:qualcomm:ipq8072a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8074_firmware — cpe:2.3:o:qualcomm:ipq8074_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8074a_firmware — cpe:2.3:o:qualcomm:ipq8074a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8076_firmware — cpe:2.3:o:qualcomm:ipq8076_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8076a_firmware — cpe:2.3:o:qualcomm:ipq8076a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8078a_firmware — cpe:2.3:o:qualcomm:ipq8078a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8173_firmware — cpe:2.3:o:qualcomm:ipq8173_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8174_firmware — cpe:2.3:o:qualcomm:ipq8174_firmware:-:*:*:*:*:*:*:*
qualcomm msm8909w_firmware — cpe:2.3:o:qualcomm:msm8909w_firmware:-:*:*:*:*:*:*:*
qualcomm msm8917_firmware — cpe:2.3:o:qualcomm:msm8917_firmware:-:*:*:*:*:*:*:*
qualcomm msm8953_firmware — cpe:2.3:o:qualcomm:msm8953_firmware:-:*:*:*:*:*:*:*
qualcomm pm215_firmware — cpe:2.3:o:qualcomm:pm215_firmware:-:*:*:*:*:*:*:*
qualcomm pm3003a_firmware — cpe:2.3:o:qualcomm:pm3003a_firmware:-:*:*:*:*:*:*:*
qualcomm pm4125_firmware — cpe:2.3:o:qualcomm:pm4125_firmware:-:*:*:*:*:*:*:*
qualcomm pm4250_firmware — cpe:2.3:o:qualcomm:pm4250_firmware:-:*:*:*:*:*:*:*
qualcomm pm439_firmware — cpe:2.3:o:qualcomm:pm439_firmware:-:*:*:*:*:*:*:*
qualcomm pm456_firmware — cpe:2.3:o:qualcomm:pm456_firmware:-:*:*:*:*:*:*:*
qualcomm pm6125_firmware — cpe:2.3:o:qualcomm:pm6125_firmware:-:*:*:*:*:*:*:*
qualcomm pm6150_firmware — cpe:2.3:o:qualcomm:pm6150_firmware:-:*:*:*:*:*:*:*
qualcomm pm6150a_firmware — cpe:2.3:o:qualcomm:pm6150a_firmware:-:*:*:*:*:*:*:*
qualcomm pm6150l_firmware — cpe:2.3:o:qualcomm:pm6150l_firmware:-:*:*:*:*:*:*:*
qualcomm pm6250_firmware — cpe:2.3:o:qualcomm:pm6250_firmware:-:*:*:*:*:*:*:*
qualcomm pm6350_firmware — cpe:2.3:o:qualcomm:pm6350_firmware:-:*:*:*:*:*:*:*
qualcomm pm640a_firmware — cpe:2.3:o:qualcomm:pm640a_firmware:-:*:*:*:*:*:*:*
qualcomm pm640l_firmware — cpe:2.3:o:qualcomm:pm640l_firmware:-:*:*:*:*:*:*:*
qualcomm pm640p_firmware — cpe:2.3:o:qualcomm:pm640p_firmware:-:*:*:*:*:*:*:*
qualcomm pm660_firmware — cpe:2.3:o:qualcomm:pm660_firmware:-:*:*:*:*:*:*:*
qualcomm pm660a_firmware — cpe:2.3:o:qualcomm:pm660a_firmware:-:*:*:*:*:*:*:*
qualcomm pm660l_firmware — cpe:2.3:o:qualcomm:pm660l_firmware:-:*:*:*:*:*:*:*
qualcomm pm670_firmware — cpe:2.3:o:qualcomm:pm670_firmware:-:*:*:*:*:*:*:*
qualcomm pm670a_firmware — cpe:2.3:o:qualcomm:pm670a_firmware:-:*:*:*:*:*:*:*
qualcomm pm670l_firmware — cpe:2.3:o:qualcomm:pm670l_firmware:-:*:*:*:*:*:*:*
qualcomm pm7150a_firmware — cpe:2.3:o:qualcomm:pm7150a_firmware:-:*:*:*:*:*:*:*
qualcomm pm7150l_firmware — cpe:2.3:o:qualcomm:pm7150l_firmware:-:*:*:*:*:*:*:*
qualcomm pm7250_firmware — cpe:2.3:o:qualcomm:pm7250_firmware:-:*:*:*:*:*:*:*
qualcomm pm7250b_firmware — cpe:2.3:o:qualcomm:pm7250b_firmware:-:*:*:*:*:*:*:*
qualcomm pm7350c_firmware — cpe:2.3:o:qualcomm:pm7350c_firmware:-:*:*:*:*:*:*:*
qualcomm pm8004_firmware — cpe:2.3:o:qualcomm:pm8004_firmware:-:*:*:*:*:*:*:*
qualcomm pm8005_firmware — cpe:2.3:o:qualcomm:pm8005_firmware:-:*:*:*:*:*:*:*
qualcomm pm8008_firmware — cpe:2.3:o:qualcomm:pm8008_firmware:-:*:*:*:*:*:*:*
qualcomm pm8009_firmware — cpe:2.3:o:qualcomm:pm8009_firmware:-:*:*:*:*:*:*:*
qualcomm pm8150_firmware — cpe:2.3:o:qualcomm:pm8150_firmware:-:*:*:*:*:*:*:*
qualcomm pm8150a_firmware — cpe:2.3:o:qualcomm:pm8150a_firmware:-:*:*:*:*:*:*:*
qualcomm pm8150b_firmware — cpe:2.3:o:qualcomm:pm8150b_firmware:-:*:*:*:*:*:*:*
qualcomm pm8150c_firmware — cpe:2.3:o:qualcomm:pm8150c_firmware:-:*:*:*:*:*:*:*
qualcomm pm8150l_firmware — cpe:2.3:o:qualcomm:pm8150l_firmware:-:*:*:*:*:*:*:*
qualcomm pm8250_firmware — cpe:2.3:o:qualcomm:pm8250_firmware:-:*:*:*:*:*:*:*
qualcomm pm8350_firmware — cpe:2.3:o:qualcomm:pm8350_firmware:-:*:*:*:*:*:*:*
qualcomm pm8350b_firmware — cpe:2.3:o:qualcomm:pm8350b_firmware:-:*:*:*:*:*:*:*
qualcomm pm8350bh_firmware — cpe:2.3:o:qualcomm:pm8350bh_firmware:-:*:*:*:*:*:*:*
qualcomm pm8350bhs_firmware — cpe:2.3:o:qualcomm:pm8350bhs_firmware:-:*:*:*:*:*:*:*
qualcomm pm8350c_firmware — cpe:2.3:o:qualcomm:pm8350c_firmware:-:*:*:*:*:*:*:*
qualcomm pm855_firmware — cpe:2.3:o:qualcomm:pm855_firmware:-:*:*:*:*:*:*:*
qualcomm pm855b_firmware — cpe:2.3:o:qualcomm:pm855b_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-1891

cvelogic Threat Intelligence