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Vulnerability record · CVE-2020-11256 · published 9 June 2021

CVE-2020-11256: Qualcomm ar7420 firmware memory buffer overflow vulnerability

Qualcomm · Ar7420 Firmware

Memory corruption due to lack of check of validation of pointer to buffer passed to trustzone in Snapdragon Wired Infrastructure and Networking

8.8 CVSS 3.1 High EPSS 0.18% · top 93.3% CWE-119 · Memory buffer overflow
8.8CVSS 3.1 base score, v2 7.2
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
26Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Memory corruption due to lack of check of validation of pointer to buffer passed to trustzone in Snapdragon Wired Infrastructure and Networking

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

26 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.qualcomm.com/company/product-security/bulletins/january-2021-bulletin PatchVendor Advisory
https://www.qualcomm.com/company/product-security/bulletins/january-2021-bulletin PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2023-33063Qualcomm DSP Services use-after-free memory corruptionCVE-2023-33063 is a use-after-free memory corruption flaw in Qualcomm DSP Services, triggered during a remote call from the high-level operating syst…KEVEPSS 0.67%analysed9.8CVE-2024-49839Qualcomm ar8035 firmware out-of-bounds read vulnerabilityMemory corruption during management frame processing due to mismatch in T2LM info element.EPSS 0.30%9.8CVE-2024-45569Qualcomm ar8035 firmware vulnerabilityMemory corruption while parsing the ML IE due to invalid frame content.EPSS 0.58%9.8CVE-2024-33066Qualcomm snapdragon x65 5g modem-rf system firmware improper input validation vulnerabilityMemory corruption while redirecting log file to any file location with any file name.EPSS 0.60%9.8CVE-2024-21473Qualcomm ar8035 firmware improper input validation vulnerabilityMemory corruption while redirecting log file to any file location with any file name.EPSS 0.66%9.8CVE-2023-43553Qualcomm ar8035 firmware vulnerabilityMemory corruption while parsing beacon/probe response frame when AP sends more supported links in MLIE.EPSS 0.35%9.8CVE-2023-43552Qualcomm ar8035 firmware use after free vulnerabilityMemory corruption while processing MBSSID beacon containing several subelement IE.EPSS 0.35%9.8CVE-2023-33082Qualcomm ar8035 firmware classic buffer overflow vulnerabilityMemory corruption while sending an Assoc Request having BTM Query or BTM Response containing MBO IE.EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2020-11256), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.