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Qualcomm Snapdragon CVE-2026-21379

| EUVDEUVD-2026-41929 HIGH
Buffer Over-read (CWE-126)
2026-07-06 qualcomm GHSA-8956-f28w-h25c
7.8
CVSS 3.1 · Vendor: qualcomm
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Severity by source

Vendor (qualcomm) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

Local trigger via a device-resident process gives AV:L and PR:L; unbounded allocation is low-complexity (AC:L) and yields full memory-corruption impact (C/I/A:H).

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (qualcomm).

CVSS VectorVendor: qualcomm

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

Lifecycle Timeline

1
Analysis Generated
Jul 06, 2026 - 21:07 vuln.today

DescriptionCVE.org

Memory Corruption when allocating memory with sizes that exceed the maximum allowed value.

AnalysisAI

Local privilege escalation via memory corruption affects Qualcomm Snapdragon platforms, where allocating memory with sizes exceeding the maximum allowed value corrupts adjacent memory (CWE-126, buffer over-read/overflow). A local attacker with low privileges (PR:L) and no user interaction can compromise confidentiality, integrity, and availability (all High), scoring CVSS 7.8. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV.

Technical ContextAI

The affected component is the Qualcomm Snapdragon system-on-chip platform (cpe:2.3:a:qualcomm,_inc.:snapdragon), a family of mobile/embedded chipsets bundling CPU, GPU, DSP, and baseband along with vendor firmware and drivers. The root cause is classed as CWE-126 (Buffer Over-read), triggered here during a memory allocation path that fails to bound the requested size against a maximum allowed value; an oversized allocation request leads to out-of-bounds access and memory corruption. Because this executes within Snapdragon platform software (typically a driver or firmware interface reachable from a local process), corruption of kernel/privileged memory structures is the plausible impact surface. Qualcomm tags this as a Buffer Overflow issue in its July 2026 security bulletin.

RemediationAI

Apply the Qualcomm-supplied fix as delivered through your device OEM: install the firmware/OS update whose security patch level incorporates the July 2026 Qualcomm bulletin fixes (https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2026-bulletin.html) - the exact fixed version is device- and chipset-specific and is not enumerated in the provided data, so cite the OEM's patched build rather than a single global version number. No standalone version string was provided in the input, so this is best described as Patch available per vendor advisory. As a compensating control until the OEM update lands, restrict installation of untrusted third-party applications and enforce app-vetting/MDM policies to limit which local processes can reach the vulnerable allocation path; the trade-off is reduced device flexibility and reliance on OEM update cadence, which for some devices may lag the Qualcomm bulletin by weeks.

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CVE-2026-21379 vulnerability details – vuln.today

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