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How the mentioned CVE works:
The vulnerability exists within the Direct Rendering Manager (DRM) driver for AMD display graphics in the Linux kernel. The function `dce110_blank_stream` retrieves a pointer to a hardware sequencing object (dce_hwseq), but fails to validate if this pointer is null before subsequently using it. Although a prior check exists for a related `hws` variable, the specific `dce_hwseq` pointer is used without a similar null check. If this pointer is null, the kernel attempts to dereference it, leading to a system crash or kernel panic, denying service to the user.
Platform: Linux Kernel
Version: AMD Display Driver
Vulnerability : Null Dereference
Severity: Medium
date: 07/25/2025
Prediction: Patch expected by 08/08/2025
What Undercode Say:
dmesg | grep "BUG:" cat /proc/version git log --oneline --grep="79db43611ff"
// Code snippet from the vulnerable function
struct dce_hwseq hws = ...;
// ... hws is potentially set to null ...
if (hws->wa_seems_needed) { // Potential NULL pointer dereference here
// ... code ...
}
How Exploit:
Trigger system crash.
Protection from this CVE
Apply kernel patch.
Impact:
Kernel panic, DoS.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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