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How the CVE Works
CVE-2025-27047 is a memory corruption vulnerability in Qualcomm’s GPU driver triggered via the TESTPATTERNCONFIG escape path. When specially crafted GPU commands are processed through this escape path, improper memory handling leads to out-of-bounds write conditions. Attackers can exploit this to execute arbitrary code in kernel context by manipulating memory structures during pattern configuration tests. The vulnerability stems from insufficient validation of user-supplied parameters before buffer operations. Successful exploitation requires local access but grants elevated privileges due to kernel-mode execution.
DailyCVE Form
Platform: Qualcomm Adreno GPU
Version: Kernel drivers pre-5.4.270
Vulnerability: Memory corruption
Severity: Critical
Date: 2025-07-21
Prediction: Patch by 2025-08-15
What Undercode Say
adb shell dmesg | grep -i "gpu_fault" perf trace -e kmem: -p $(pidof surfaceflinger)
ioctl(fd, TESTPATTERNCONFIG, &malicious_config);
How Exploit
1. Craft malicious GPU command sequence
2. Trigger TESTPATTERNCONFIG ioctl
3. Overwrite kernel structures
Protection from this CVE
1. Update GPU drivers
2. Restrict GPU access
3. Enable SELinux enforcing
Impact
1. Kernel privilege escalation
2. System compromise
3. Persistent root access
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
