CVE-2021-1968Public exploit

Kernel memory disclosure via wrong copy source

Published Oct 20, 2021 · Updated Aug 3, 2024

Information disclosure in Qualcomm Snapdragon NPU drivers allows local users to read kernel memory through an execution-completion event. The npu_process_kevent function passes the address of reserved[0], rather than the network statistics buffer pointer stored in that field, to copy_to_user, copying the event object and adjacent kernel data into user space. An untrusted Android app can trigger the affected ioctl without elevated privileges and recover kernel heap addresses, but the flaw alone does not write memory or execute code.

CVSS severity6.2
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Qualcomm Snapdragon NPU drivers allows local users to read kernel memory through an execution-completion event. The npu_process_kevent function passes the address of reserved[0], rather than the network statistics buffer pointer stored in that field, to copy_to_user, copying the event object and adjacent kernel data into user space. An untrusted Android app can trigger the affected ioctl without elevated privileges and recover kernel heap addresses, but the flaw alone does not write memory or execute code.

The record

CVE
CVE-2021-1968
Published
Oct 20, 2021
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-20, CWE-200
Attack vector
local
Privileges
unauthenticated

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=AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, FSM10055, FSM10056, MDM9150, QCA6391, QCA6420, QCA6430, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCM6125, QCS405, QCS410, QCS610, QCS6125, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD 8C, SD 8CX, SD665, SD675, SD678, SD720G, SD855, SDA429W, SDX55, SDX55M, SM6250, WCD9335, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCN3610, WCN3620, WCN3660B, WCN3950, WCN3980, WCN3988, WCN3991, WCN3998, WCN3999, WSA8810, WSA8815

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, FSM10055, FSM10056, MDM9150, QCA6391, QCA6420, QCA6430, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCM6125, QCS405, QCS410, QCS610, QCS6125, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD 8C, SD 8CX, SD665, SD675, SD678, SD720G, SD855, SDA429W, SDX55, SDX55M, SM6250, WCD9335, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCN3610, WCN3620, WCN3660B, WCN3950, WCN3980, WCN3988, WCN3991, WCN3998, WCN3999, WSA8810, WSA8815

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
6.2QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

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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