High

Double-free in Qualcomm Windows WLAN Host driver command message processing

IdentifiersCVE-2025-27051CWE-415· Double Free

CVE-2025-27051 is a critical double-free vulnerability in Qualcomm's Windows WLAN Host driver. The flaw is triggered while the driver processes certain command messages in the WLAN Host component. According to the provided content, the driver improperly frees memory more than once without adequate validation, resulting in heap metadata corruption and broader memory corruption in kernel-context driver code. Because the issue affects memory management in a Windows wireless driver, successful exploitation could allow an attacker to corrupt allocator state and potentially steer execution flow. The specific vulnerable driver versions, exact code path, and precise command sequence required to trigger the bug were not disclosed in the provided material.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

The primary impact is severe memory corruption in the affected Qualcomm Windows WLAN Host driver. Corruption of heap metadata can destabilize the system, cause crashes or denial of service, and, under successful exploitation conditions, enable privilege escalation or arbitrary code execution. Given that the flaw is in a Windows driver, arbitrary code execution would likely occur with elevated privileges in kernel or highly privileged driver context.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting local attacker access to affected Windows systems, restricting installation or use of untrusted local software, and minimizing opportunities for low-privileged users to interact with vulnerable driver interfaces. Where operationally feasible, disable affected Qualcomm wireless functionality or remove/disable the vulnerable device/driver until patched. Monitor for abnormal crashes, WLAN driver instability, and suspicious local post-exploitation activity that could indicate attempts to exploit kernel driver memory corruption. Specific exploit-blocking mitigations beyond patching were not provided in the source content.

Remediation

Patch, then assume compromise.

Apply Qualcomm's fix for CVE-2025-27051 as provided in the July 2025 Qualcomm Security Bulletin, and deploy the corresponding updated Windows WLAN Host driver packages from Qualcomm, OEMs, or system vendors. Because the provided content does not disclose affected version ranges, defenders should inventory Windows systems using Qualcomm wireless chipsets and ensure the installed WLAN Host driver has been updated to the vendor-fixed release. Standard remediation should include validating driver package provenance, testing updated drivers in enterprise deployment workflows, and prioritizing patching on exposed or high-value endpoints.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

QualcommFastconnect 6900 Firmwareoperating_system

QualcommFastconnect 7800 Firmwareoperating_system

QualcommQcc2073 Firmwareoperating_system

QualcommQcc2076 Firmwareoperating_system

QualcommSc8380xp Firmwareoperating_system

QualcommWcd9380 Firmwareoperating_system

QualcommWcd9385 Firmwareoperating_system

QualcommWsa8840 Firmwareoperating_system

QualcommWsa8845 Firmwareoperating_system

QualcommWsa8845h Firmwareoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

3 SOURCESView more in app

zeropath blogNews

Jul 8, 2025

Qualcomm's WLAN Host Driver Hit by Double Free Vulnerability (CVE-2025-27051) - ZeroPath Blog | ZeroPath

A double-free vulnerability in Qualcomm's Windows WLAN Host driver that can cause memory corruption and may enable privilege escalation or arbitrary code execution.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

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Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2