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How the CVE Works
CVE-2025-21445 exploits a memory corruption vulnerability in Qualcomm’s hypervisor when copying data between virtual machines and the host. The issue occurs due to improper bounds checking when transferring data to shared transmission queues. Attackers can craft malicious payloads that overflow the allocated buffer space, leading to arbitrary code execution in hypervisor context. The vulnerability stems from missing validation of queue indices during cross-VM communication, allowing overwrite of adjacent memory structures.
DailyCVE Form
Platform: Qualcomm Hypervisor
Version: QHM 3.x, 4.x
Vulnerability: Memory corruption
Severity: Critical
Date: 07/08/2025
Prediction: Patch expected by 08/15/2025
What Undercode Say
qemu-system-arm -M virt -cpu cortex-a57 -m 2048 gdb --ex 'target remote localhost:1234' --ex 'disas hv_copy_to_queue'
How Exploit
1. Craft oversized VM packet
2. Trigger shared queue transfer
3. Overwrite hypervisor control structures
Protection from this CVE
1. Apply vendor patches
2. Isolate VM communication
3. Enable hypervisor ASLR
Impact
1. Host-level compromise
2. VM escape
3. DoS attacks
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
