EUVD-2026-33826
GHSA-c5pf-h876-qpm9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from Vendor (qualcomm) · only source for this CVE.
CVSS VectorVendor: qualcomm
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
Memory corruption while using Strongbox due to missing bounds check.
AnalysisAI
Local privilege escalation in Qualcomm Snapdragon chipsets stems from an out-of-bounds memory access in the Strongbox trusted execution component, where a missing bounds check enables memory corruption from a low-privileged context. A successful exploit crosses a trust boundary (CVSS scope=Changed) and yields high impact to confidentiality, integrity, and availability on the affected device. No public exploit identified at time of analysis, and EPSS data was not provided alongside this advisory.
Technical ContextAI
Strongbox is Qualcomm's hardware-backed keystore implementation on Snapdragon SoCs, used by Android and other platforms to protect cryptographic keys inside a Trusted Execution Environment (TEE) or secure element. The root cause maps to CWE-129 (Improper Validation of Array Index): code paths inside the Strongbox handler accept an index or length from the caller without verifying it against the underlying buffer's bounds, allowing reads or writes outside the intended region of secure memory. Because the bug sits at the boundary between the non-secure world (HLOS/Android) and the secure world, corruption here can subvert the integrity guarantees the TEE is supposed to provide for keys and attestation.
RemediationAI
Patch available per vendor advisory: apply the Qualcomm June 2026 Security Bulletin fixes at https://docs.qualcomm.com/product/publicresources/securitybulletin/june-2026-bulletin.html as soon as the relevant OEM/carrier delivers an updated device firmware image containing the corrected Strongbox component; exact released firmware versions are not enumerated in the supplied data and must be taken from the bulletin and OEM advisories. Until OEM updates arrive, compensating controls are limited because Strongbox is a platform service - reduce attack surface by restricting installation to vetted apps (enforce Play Protect/MDM allowlists, disable sideloading), monitor for apps that abuse keystore APIs, and on managed fleets defer use of hardware-backed key attestation for high-value secrets where feasible (trade-off: weaker key protection guarantees in the interim). Removing Strongbox usage at the application layer is not a true mitigation because the vulnerable interface remains reachable; rapid firmware uptake is the only durable fix.
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Same weakness CWE-129 – Improper Validation of Array Index
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today