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Fastconnect 6800 Firmware CVE-2025-21455

HIGH
Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)
2025-08-06 product-security@qualcomm.com
Buffer Overflow Fastconnect 6800 Firmware Fastconnect 6900 Firmware Fastconnect 7800 Firmware Qca6391 Firmware Qca6426 Firmware Qca6436 Firmware Qsm8250 Firmware Sd865 5g Firmware Sdx55 Firmware Snapdragon 8 Gen 1 Mobile Platform Firmware Snapdragon 865 5g Mobile Platform Firmware Snapdragon 865 5G Mobile Platform Sm8250 Ab Firmware Snapdragon 870 5G Mobile Platform Sm8250 Ac Firmware Snapdragon X55 5g Modem Rf System Firmware Snapdragon Xr2 5g Platform Firmware Sw5100 Firmware Sw5100p Firmware Sxr2130 Firmware Sxr2230p Firmware Sxr2250p Firmware Wcd9380 Firmware Wcd9385 Firmware Wcn3980 Firmware Wcn3988 Firmware Wsa8810 Firmware Wsa8815 Firmware Wsa8830 Firmware Wsa8832 Firmware Wsa8835 Firmware
7.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.8 HIGH
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
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 19:05 vuln.today
CVE Published
Aug 06, 2025 - 08:15 nvd
HIGH 7.8

DescriptionCVE.org

Memory corruption while submitting blob data to kernel space though IOCTL.

AnalysisAI

Memory corruption while submitting blob data to kernel space though IOCTL. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-367. Memory corruption while submitting blob data to kernel space though IOCTL. Affected products include: Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6426 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2025-21455 vulnerability details – vuln.today
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