CVE-2021-1967

Memory corruption via unchecked NAN attribute count

Published Oct 20, 2021 · Updated Aug 3, 2024

Stack-based buffer overflow in Qualcomm Snapdragon WLAN HOST allows local users to corrupt memory while processing a NAN Match event. The WLAN HOST handler fails to cap the number of post-discovery attributes before copying them into a stack buffer during NAN Match-event processing. Low-privileged local access is required, and no user interaction is needed to reach the affected host processing path.

CVSS severity5.3
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Qualcomm Snapdragon WLAN HOST allows local users to corrupt memory while processing a NAN Match event. The WLAN HOST handler fails to cap the number of post-discovery attributes before copying them into a stack buffer during NAN Match-event processing. Low-privileged local access is required, and no user interaction is needed to reach the affected host processing path.

The record

CVE
CVE-2021-1967
Published
Oct 20, 2021
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-787, CWE-121
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=APQ8009, APQ8053, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, MDM9206, MDM9628, QCA6174A, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCA9367, QCA9377, QCM4290, QCM6125, QCS405, QCS410, QCS4290, QCS605, QCS610, QCS6125, QRB5165, Qualcomm215, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD 8C, SD 8CX, SD205, SD210, SD460, SD662, SD665, SD675, SD678, SD690 5G, SD720G, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD820, SD855, SD865 5G, SD870, SD888 5G, SDA429W, SDX55, SDX55M, SDXR2 5G, SM6250, SM7250P, SM7325P, WCD9326, WCD9330, WCD9335, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3610, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3680B, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8053, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, MDM9206, MDM9628, QCA6174A, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCA9367, QCA9377, QCM4290, QCM6125, QCS405, QCS410, QCS4290, QCS605, QCS610, QCS6125, QRB5165, Qualcomm215, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD 8C, SD 8CX, SD205, SD210, SD460, SD662, SD665, SD675, SD678, SD690 5G, SD720G, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD820, SD855, SD865 5G, SD870, SD888 5G, SDA429W, SDX55, SDX55M, SDXR2 5G, SM6250, SM7250P, SM7325P, WCD9326, WCD9330, WCD9335, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3610, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3680B, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

Published CVSS scores

5.3QualcommCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow

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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