CVE-2020-11294

Memory corruption via unchecked logging prefix length

Published May 7, 2021 · Updated Aug 4, 2024

Out-of-bounds write in the Snapdragon logger allows local users to corrupt memory through a crafted logging prefix. The radio interface layer prepends the prefix to a logging string without validating its size, causing the logger to write beyond its intended boundary. No user interaction is required, but local execution is necessary; Qualcomm reports limited confidentiality, integrity, and availability impact without a more specific consequence.

CVSS severity5.9
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Snapdragon logger allows local users to corrupt memory through a crafted logging prefix. The radio interface layer prepends the prefix to a logging string without validating its size, causing the logger to write beyond its intended boundary. No user interaction is required, but local execution is necessary; Qualcomm reports limited confidentiality, integrity, and availability impact without a more specific consequence.

The record

CVE
CVE-2020-11294
Published
May 7, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-129, CAPEC-100
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 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=AR8035, PM215, PM3003A, PM6125, PM6150, PM6150A, PM6150L, PM6350, PM640A, PM640L, PM640P, PM670, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8005, PM8008, PM8009, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM8350B, PM8350BH, PM8350C, PM855, PM855B, PM855L, PM8909, PM8998, PMI632, PMI8998, PMK8002, PMK8003, PMK8350, PMM6155AU, PMM8155AU, PMM8195AU, PMM855AU, PMR525, PMR735A, PMR735B, PMW3100, PMX55, QAT3516, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QAT5522, QAT5533, QAT5568, QBT1500, QBT2000, QCA6175A, QCA6390, QCA6391, QCA6421, QCA6426, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCM4290, QCM6125, QCS4290, QCS605, QCS6125, QDM2301, QDM2302, QDM2305, QDM3301, QDM4643, QDM4650, QDM5620, QDM5621, QDM5650, QDM5652, QDM5670, QDM5671, QDM5677, QDM5679, QET4101, QET4200AQ, QET5100, QET5100M, QET6100, QET6105, QET6110, QFS2530, QFS2580, QFS2608, QFS2630, QLN1021AQ, QLN1031, QLN1036AQ, QLN4642, QLN ...[truncated*]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=AR8035, PM215, PM3003A, PM6125, PM6150, PM6150A, PM6150L, PM6350, PM640A, PM640L, PM640P, PM670, PM670L, PM7150A, PM7150L, PM7250, PM7250B, PM8005, PM8008, PM8009, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM8350B, PM8350BH, PM8350C, PM855, PM855B, PM855L, PM8909, PM8998, PMI632, PMI8998, PMK8002, PMK8003, PMK8350, PMM6155AU, PMM8155AU, PMM8195AU, PMM855AU, PMR525, PMR735A, PMR735B, PMW3100, PMX55, QAT3516, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QAT5522, QAT5533, QAT5568, QBT1500, QBT2000, QCA6175A, QCA6390, QCA6391, QCA6421, QCA6426, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCM4290, QCM6125, QCS4290, QCS605, QCS6125, QDM2301, QDM2302, QDM2305, QDM3301, QDM4643, QDM4650, QDM5620, QDM5621, QDM5650, QDM5652, QDM5670, QDM5671, QDM5677, QDM5679, QET4101, QET4200AQ, QET5100, QET5100M, QET6100, QET6105, QET6110, QFS2530, QFS2580, QFS2608, QFS2630, QLN1021AQ, QLN1031, QLN1036AQ, QLN4642, QLN ...[truncated*]

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.9Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
CAPEC-100Overflow Buffers

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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