CVE-2020-11234

Kernel memory corruption via socket-event race

Published Apr 7, 2021 · Updated Aug 4, 2024

Use-after-free in the Qualcomm Snapdragon kernel allows local users to corrupt memory through a race during socket-event delivery. In sockev_client_cb, one thread can free a socket while another constructs and sends its event message, causing stale socket data to reach user space. Triggering the race requires local access to an affected kernel interface; public sources do not specify a reliable attacker-controlled primitive.

CVSS severity8.4
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Qualcomm Snapdragon kernel allows local users to corrupt memory through a race during socket-event delivery. In sockev_client_cb, one thread can free a socket while another constructs and sends its event message, causing stale socket data to reach user space. Triggering the race requires local access to an affected kernel interface; public sources do not specify a reliable attacker-controlled primitive.

The record

CVE
CVE-2020-11234
Published
Apr 7, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2021CVE 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, APQ8009W, APQ8017, APQ8053, APQ8064AU, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, CSR6030, CSRA6620, CSRA6640, MDM9206, MDM9250, MDM9607, MDM9628, MDM9640, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8909W, MSM8917, MSM8953, MSM8996AU, PM215, PM3003A, PM439, PM6125, PM6150, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM855, PM855A, PM855B, PM855L, PM855P, PM8909, PM8916, PM8937, PM8953, PM8996, PM8998, PMC1000H, PMD9607, PMD9645, PMD9655, PME605, PMI632, PMI8937, PMI8952, PMI8994, PMI8996, PMI8998, PMK8001, PMK8002, PMM855AU, PMM8996AU, PMR525, PMW3100, PMX20, PMX24, PMX50, PMX55, QAT3514, QAT3516, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QAT5522, QAT5533, QBT1000, QBT1500, QBT2000, QCA4020, QCA6174, QCA6174A, QCA6175A, QCA6310, QCA6320, QCA6335, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431 ...[truncated*]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8009, APQ8009W, APQ8017, APQ8053, APQ8064AU, APQ8096AU, AQT1000, AR8031, AR8035, AR8151, CSR6030, CSRA6620, CSRA6640, MDM9206, MDM9250, MDM9607, MDM9628, MDM9640, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8909W, MSM8917, MSM8953, MSM8996AU, PM215, PM3003A, PM439, PM6125, PM6150, PM640A, PM640L, PM640P, PM660, PM660A, PM660L, PM670, PM670A, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM855, PM855A, PM855B, PM855L, PM855P, PM8909, PM8916, PM8937, PM8953, PM8996, PM8998, PMC1000H, PMD9607, PMD9645, PMD9655, PME605, PMI632, PMI8937, PMI8952, PMI8994, PMI8996, PMI8998, PMK8001, PMK8002, PMM855AU, PMM8996AU, PMR525, PMW3100, PMX20, PMX24, PMX50, PMX55, QAT3514, QAT3516, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QAT5522, QAT5533, QBT1000, QBT1500, QBT2000, QCA4020, QCA6174, QCA6174A, QCA6175A, QCA6310, QCA6320, QCA6335, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431 ...[truncated*]

Published CVSS scores

8.4NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Weakness, pattern, technique

CWE-416Use After Free

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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