Google patches actively exploited Android vulnerability (CVE-2024-43093)

CVE-2024-43047 is a use-after-free vulnerability (CWE-416) in the firmware of several Qualcomm connectivity chipsets and the QAM8295P automotive SoC, where maintaining memory maps of high-level operating system (HLOS) memory causes memory corruption. The flaw is scored with a local attack vector and low privileges required (CVSS 3.1: 7.8), so an attacker needs some local foothold, such as a malicious app on an Android device, and can then leverage the memory corruption for high-impact confidentiality, integrity, and availability effects, in practice a privilege escalation to system or kernel level. Anyone running devices built on the affected chips is exposed, including Android smartphones with FastConnect 6700/6800/6900/7800, devices using QCA-series Wi-Fi chips, and automotive platforms using the QAM8295P. The vulnerability is confirmed exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2024-10-08, and news reports describe targeted, limited Android attacks, though ransomware use is unknown and EPSS remains modest at 0.7%.

Do: Apply Qualcomm's fix through your device or system OEM: install the latest Android security updates on affected phones, and update firmware/drivers for QCA-series Wi-Fi chips and the QAM8295P automotive SoC per vendor instructions; because this is a local firmware flaw, there is no user-side mitigation short of patching. Organizations under CISA KEV must remediate per the required action (apply vendor remediations or discontinue use). Prioritize an inventory of Android devices with FastConnect 6700/6800/6900/7800 and QCA6xxx/65xxx chips, noting this flaw is being used in targeted attacks rather than mass-scale campaigns.

CVE-2024-43093 is a privilege escalation flaw in the Android Framework's ExternalStorageProvider (the component behind the system document/file picker), where the shouldHideDocument function mishandles Unicode normalization, allowing crafted file paths to bypass the filter that hides sensitive directories such as app-private storage (CWE-176). It is triggered locally: an app with no additional execution privileges can exploit it with user interaction, for example when a user selects a file or location through the documents UI. A successful bypass grants unauthorized access to otherwise protected directories and can lead to local escalation of privilege with high impact on confidentiality, integrity, and availability (CVSS 3.1 score 7.3, vector AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H). Any device running the Android Framework is in scope, meaning effectively the entire Android installed base, although the local access and user-interaction requirements limit practical exploitability to targeted scenarios. The flaw was added to CISA's Known Exploited Vulnerabilities catalog on 2024-11-07 and Google has indicated it may be under limited, targeted exploitation; no public proof-of-concept is known, and EPSS currently rates the 30-day exploitation probability at a modest 0.7%, though the KEV listing is the authoritative in-the-wild signal.

Do: Apply Google's Android security updates immediately — the fix is included in the November 2024 Android Security Bulletin (security patch level 2024-11-01) or later — and verify the device's security patch level in Settings; OEM devices (e.g., Samsung) may receive the fix through vendor updates on a lag. Per the CISA KEV required action, treat patching as urgent or apply vendor mitigations, and as an interim measure restrict sideloaded/untrusted app installs and caution users when picking files through the document picker. Ransomware linkage is unknown, and the user-interaction requirement means exploitation is targeted rather than wormable.