Fastconnect 6900 Firmware
CVE-2023-21640
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
Memory corruption in Linux when the file upload API is called with parameters having large buffer.
AnalysisAI
Memory corruption in Linux when the file upload API is called with parameters having large buffer. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. Memory corruption in Linux when the file upload API is called with parameters having large buffer. Affected products include: Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Snapdragon 8 Gen 1 Firmware, Qualcomm Wcd9380 Firmware, Qualcomm Wsa8830 Firmware.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.
More in Fastconnect 6900 Firmware
View allQualcomm GPU micronode contains a memory corruption vulnerability (CVE-2025-21480, CVSS 8.6) caused by unauthorized comm
A second Qualcomm GPU micronode memory corruption vulnerability (CVE-2025-21479, CVSS 8.6) exists in the unauthorized co
A Qualcomm chipset vulnerability (CVE-2026-21385) causes memory corruption through improper integer handling during memo
Memory corruption in Data Modem when a non-standard SDP body, during a VOLTE call. Rated critical severity (CVSS 9.8), t
Memory corruption while playing audio file having large-sized input buffer. Rated critical severity (CVSS 9.8), this vul
Memory corruption while redirecting log file to any file location with any file name. Rated critical severity (CVSS 9.8)
Memory corruption while processing Codec2 during v13k decoder pitch synthesis. Rated critical severity (CVSS 9.8), this
Memory Corruption in Multi-mode Call Processor while processing bit mask API. Rated critical severity (CVSS 9.8), this v
Memory corruption in Modem while processing security related configuration before AS Security Exchange. Rated critical s
Memory Corruption in Data Modem while making a MO call or MT VOLTE call. Rated critical severity (CVSS 9.8), this vulner
Memory corruption in WLAN Firmware while parsing receieved GTK Keys in GTK KDE. Rated critical severity (CVSS 9.8), this
Weak Configuration due to improper input validation in Modem while processing LTE security mode command message received
Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today