CVE-2021-1969Known exploitationPublic exploit

Kernel-address disclosure via uninitialized NPU event data

Published Oct 20, 2021 · Updated Aug 3, 2024

Information disclosure in Qualcomm Snapdragon NPU drivers allows local users to read kernel memory through the event-receive ioctl. The app_msg_proc path initializes only part of msm_npu_event, and npu_receive_event copies the full structure, including uninitialized bytes, to user space. An untrusted app with NPU device access can retrieve a kernel function address and defeat KASLR; the flaw alone does not provide code execution.

CVSS severity6.2
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationReported
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 the event-receive ioctl. The app_msg_proc path initializes only part of msm_npu_event, and npu_receive_event copies the full structure, including uninitialized bytes, to user space. An untrusted app with NPU device access can retrieve a kernel function address and defeat KASLR; the flaw alone does not provide code execution.

The record

CVE
CVE-2021-1969
Published
Oct 20, 2021
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-200, CWE-20
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

6.2QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-200Information Exposure
CWE-20Improper Input Validation

Public exploit references

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Reported exploitation

Technologies

Your stack

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Your stack

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