CVE-2026-24090: Qualcomm Partition Table Cryptographic Flaw Enables Boot Modification

Technical summary

CVE-2026-24090 stems from inadequate cryptographic verification (CWE-306: Missing Authentication for Critical Function) of partition table entries across a wide range of Qualcomm mobile and audio platforms. During boot sequence processing, the firmware fails to properly authenticate partition table modifications, allowing a local attacker with user-level privileges to tamper with partition metadata. The CVSS 3.1 score of 7.1 (HIGH) reflects high impact on confidentiality and integrity of the boot flow, limited by local attack vector and user-level access requirement. The vulnerability affects both the base platforms and their corresponding firmware packages.

Business impact

Devices running affected Qualcomm processors become vulnerable to unauthorized boot-flow modification. An attacker with physical or local access could persist malicious code at the firmware level, potentially evading detection by operating system-based security tools. For organizations deploying smartphones, tablets, or IoT devices on these platforms, this creates a pathway for sophisticated compromise that survives software updates and factory resets. Supply chain and managed device scenarios present elevated risk, as compromised devices could be distributed or remotely managed by adversaries post-compromise.

Affected systems

The vulnerability affects a broad portfolio of Qualcomm platforms spanning mobile (Snapdragon 460, 4 Gen 1/2), premium flagship (SM8845P, SM8750P, SM8650Q), mid-range (SM7675, SM7550, SM7525, SM7435, SM6850), and audio processors (Smart Audio 400). Both the base silicon platforms and their associated firmware packages are affected. Organizations should inventory devices and products based on these specific Qualcomm models to determine exposure scope.

Exploitability

Exploitation requires local access and user-level privileges on the target device—an attacker cannot exploit this remotely. However, the local requirement is a relatively low bar: a malicious application, supply-chain compromise, or physical device access enables attack. Once achieved, no additional user interaction or elevated privileges are needed to modify partition tables and alter boot behavior. Organizations relying on physical security or application sandboxing as primary mitigations should recognize this threat model.

Remediation

Patch availability and timelines depend on individual device manufacturers and Qualcomm's firmware release schedule. Affected parties should contact their Qualcomm representative or check device manufacturer security advisories for firmware updates addressing partition table authentication. Interim mitigations include restricting user-level access to trusted applications and enforcing device management policies that limit local code execution. Organizations should prioritize patching based on device criticality and deployment context (e.g., managed fleet vs. consumer devices).

Patch guidance

Monitor Qualcomm security bulletins and your device manufacturer's advisory channels for firmware patches specific to your platform (e.g., SM8845P, Snapdragon 460, Smart Audio 400). Patch deployment typically requires device restart and may necessitate coordination with fleet management systems for enterprise deployments. Verify against the vendor advisory that patches address partition table cryptographic authentication before rolling out. Test patches in a non-production environment first, particularly for audio and IoT devices where unexpected behavior could impact services.

Detection guidance

Detection requires firmware-level monitoring or forensic analysis post-compromise, as partition table modifications occur before the OS boots. Organizations should implement: (1) secure boot validation checks if available on the device platform, (2) periodic integrity verification of partition metadata in enterprise device management tools, and (3) monitoring for abnormal boot-time behavior or unexpected firmware changes. Host-based detection on the operating system layer is limited; endpoint security tools should focus on detecting suspicious post-boot activity consistent with firmware-level compromise.

Why prioritize this

This vulnerability merits prioritization because it enables persistence below the OS layer and affects a vast installed base of Qualcomm devices. The local+user-level attack vector is achievable via malicious apps, supply-chain routes, or physical access—realistic threat scenarios for many organizations. Unlike OS-level vulnerabilities, firmware-level compromise evades standard patching workflows and security tools, making remediation harder and impact longer-lasting. However, exploitation is not trivial and requires some form of local foothold, so immediate patching of all devices may be sequenced behind other immediate threats.

Risk score, explained

The CVSS 3.1 score of 7.1 reflects HIGH severity: high impact on boot integrity and confidentiality (both I and C flags set), but limited by the local attack vector and requirement for user-level privileges. The score appropriately captures that compromise is serious and difficult to detect, but not as severe as a remote vulnerability. For organizations with rigorous physical security and restricted app deployment policies, risk can be lowered through compensating controls; for BYOD or less-controlled environments, the effective risk is higher.

Frequently asked questions