CVE-2023-21640
CVE-2023-21640 is a medium-severity vulnerability in Qualcomm Fastconnect 6900 Firmware with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 6.7)
- EPSS exploit prediction: 0% (2nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Qualcomm Fastconnect 6900 Firmware
- Published:
- Last modified:
Description
Memory corruption in Linux when the file upload API is called with parameters having large buffer.
Frequently asked questions
- What is CVE-2023-21640?
- Memory corruption in Linux when the file upload API is called with parameters having large buffer.
- How severe is CVE-2023-21640?
- CVE-2023-21640 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2023-21640 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-21640?
- CVE-2023-21640 primarily affects Qualcomm Fastconnect 6900 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-21640?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2023-21640 published?
- CVE-2023-21640 was published on 2023-07-04 and last updated on 2026-06-17.
References
Affected products (6)
- cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:qualcomm:snapdragon_8_gen_1_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:qualcomm:wsa8830_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:qualcomm:wsa8835_firmware:-:*:*:*:*:*:*:*
More vulnerabilities in Qualcomm Fastconnect 6900 Firmware
- CVE-2025-27034 — Critical (CVSS 9.8): Memory corruption while selecting the PLMN from SOR failed list.
- CVE-2025-21483 — Critical (CVSS 9.8): Memory corruption when the UE receives an RTP packet from the network, during the reassembly of NALUs.
- CVE-2024-45569 — Critical (CVSS 9.8): Memory corruption while parsing the ML IE due to invalid frame content.
- CVE-2024-21473 — Critical (CVSS 9.8): Memory corruption while redirecting log file to any file location with any file name.
- CVE-2023-43553 — Critical (CVSS 9.8): Memory corruption while parsing beacon/probe response frame when AP sends more supported links in MLIE.
- CVE-2023-43552 — Critical (CVSS 9.8): Memory corruption while processing MBSSID beacon containing several subelement IE.
All CVEs affecting Qualcomm Fastconnect 6900 Firmware →
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