High severity · published Jul 4, 2023
CVE-2023-21635
Buffer Copy without Checking Size of Input in Data Network Stack & Connectivity
7.8
CVSS
0.1%
EPSS
No
On KEV
Description
Memory Corruption in Data Network Stack & Connectivity when sim gets detected on telephony.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SN
Snapdragon · Qualcomm, Inc.
AQT1000; CSRB31024; FastConnect 6200; FastConnect 6800; FastConnect 6900; QCA6391; +34 more · source: vendor
AF
Aqt1000 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
CF
Csrb31024 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
F6
Fastconnect 6200 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
F6
Fastconnect 6800 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
F6
Fastconnect 6900 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
QF
Qca6391 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
QF
Qca6420 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
QF
Qca6426 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
QF
Qca6430 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
QF
Qca6436 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
QF
Qca6564 Firmware · Qualcomm
All versions, or not specified · source: NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-21635
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-21635
Vendor Advisory
https://www.qualcomm.com/company/product-security/bulletins/july-2023-bulletin
More from Snapdragon
8.6
CVE-2025-21479
Incorrect Authorization in Graphics
8.6
CVE-2025-21480
Incorrect Authorization in Graphics Windows
7.8
CVE-2026-21385
Integer Overflow or Wraparound in Graphics
7.8
CVE-2024-43047
Use After Free in DSP Service
7.8
CVE-2023-33107
Integer Overflow or Wraparound in Graphics Linux