EUVD-2026-81330
GHSA-64r8-7jq7-4w26
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Local vector with a low-privileged foothold (AV:L/PR:L), no interaction (UI:N); stack overflow crosses a privilege boundary (S:C) giving full C/I/A impact, matching vendor 8.8.
Primary rating from Vendor (qualcomm).
CVSS VectorVendor: qualcomm
Lifecycle Timeline
3DescriptionCVE.org
Memory Corruption when copying unverified data from an external source exceeds the allocated buffer size.
AnalysisAI
Stack-based memory corruption in Qualcomm Snapdragon firmware allows a locally-resident, low-privileged process to overflow a fixed-size stack buffer by supplying oversized 'external source' data, yielding high confidentiality, integrity and availability impact that crosses a security boundary. Per the assessed vector (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, base 8.8) an attacker must already hold a low-privileged foothold on the device, so this is a local privilege-escalation / code-execution primitive rather than a remotely reachable bug; no user interaction is required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires local access with low privileges (AV:L, PR:L) on a Qualcomm Snapdragon-based device - the attacker must already run code (e.g., a malicious or compromised app/process) that can reach the vulnerable interface. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, base 8.8) describes a locally-exploitable stack-based buffer overflow (CWE-121) requiring low privileges but yielding full confidentiality/integrity/availability impact across a security boundary (S:C scope change). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Primary path is to apply the firmware/chipset fix published in Qualcomm's September 2026 product security bulletin (https://docs.qualcomm.com/product/publicresources/securitybulletin/september-2026-bulletin.html); the exact patched version string is not specified in the provided data, so confirm the relevant build against the bulletin or your OEM's advisory - Qualcomm supplies the fix to device makers and users must obtain the resulting update from the device OEM or carrier. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Qualcomm Snapdragon-based devices by SoC model and firmware build to determine exposure, enforce least privilege to limit local low-privileged footholds, and restrict execution of untrusted local processes. …
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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