Qualcomm FastConnect
CVE-2025-27049
MEDIUM
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
IOCTL invocation requires local access from a privileged-enough process (AV:L, PR:L); the out-of-bounds read reliably crashes the component (AC:L, A:H) with no data exposure (C:N/I:N).
Primary rating from Vendor (qualcomm).
CVSS VectorVendor: qualcomm
Lifecycle Timeline
3DescriptionCVE.org
Transient DOS while processing IOCTL call for image encoding.
AnalysisAI
Local attackers with low privileges can trigger a transient denial-of-service (DoS) in Qualcomm FastConnect firmware (and other listed Qualcomm chipsets) by invoking a crafted IOCTL call for image encoding, leading to a temporary device reset. The flaw is not remotely exploitable and requires existing code execution on the device; it affects availability only, with no confidentiality or integrity impact, and recovery is automatic. With an EPSS score of 0.08% and no public exploit identified, this is a low-priority issue.
Technical ContextAI
The vulnerability resides in Qualcomm firmware handling IOCTL (input/output control) calls for image encoding. CWE-126 (Buffer Over-read) indicates that the firmware reads beyond the intended buffer bounds due to an incorrect length value supplied in the IOCTL request. This out-of-bounds read can cause a firmware fault, resulting in a transient denial of service as the affected subsystem resets. The affected products, as identified by CPEs, include FastConnect 6700/6900/7800, QCC2072, QCM5430, QCM6490, QCS5430, QCS6490, Video Collaboration VC3 Platform, SC8380XP, WCD9370/9375/9378C/9380/9385, WSA8830/8835/8840/8845/8845H, X2000077/86/90/92/94, XG101002/32/39, Snapdragon 8Cx Gen 3 Compute Platform SC8280XP AB/BB, and Snapdragon 7C Gen 3 Compute. The IOCTL interface is likely exposed to local processes, and the attacker must have the ability to send crafted IOCTL requests (PR:L). No user interaction is required, and the scope is unchanged.
RemediationAI
Apply the latest firmware updates provided by Qualcomm in the October 2025 security bulletin (https://docs.qualcomm.com/product/publicresources/securitybulletin/october-2025-bulletin.html). Device OEMs should incorporate these patches into their firmware releases. As a compensating control, restrict local access to the image-encoding IOCTL interface using OS-level security policies (e.g., SELinux or AppArmor) to prevent low-privileged processes from invoking it; however, this may break camera or video encoding functionality. Since the vulnerability is transient and requires local access, the risk is low, and patching is the primary remediation. No public exploit is known, and EPSS is very low (0.08%).
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today