CVE-2026-41154 in Graphics DDK
Summary
by MITRE • 07/10/2026
Software installed and run as a non-privileged user may cause OOB kernel memory reads or writes through GPU API calls.
When indexing pages larger than 4kB in the page freeing logic of the sparse memory implementation, incorrect buffer indexing leads to OOB access.
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Analysis
by VulDB Data Team • 07/10/2026
This vulnerability represents a critical kernel memory safety issue that arises from improper buffer handling within the sparse memory management subsystem of the operating system kernel. The flaw occurs specifically when processing page freeing operations for memory regions that exceed the standard 4KB page size limits. When the kernel attempts to index pages beyond the allocated buffer boundaries during sparse memory deallocation, it results in out-of-bounds memory access patterns that can potentially expose sensitive kernel data or allow unauthorized modifications to kernel memory structures.
The technical implementation of this vulnerability stems from inadequate bounds checking within the memory management code path responsible for handling large page allocations. During the page freeing process, the kernel's sparse memory implementation fails to properly validate array indices against the actual buffer dimensions, creating a condition where memory operations can extend beyond intended boundaries. This type of buffer overflow vulnerability falls under the common weakness enumeration CWE-129 and specifically relates to improper validation of buffer bounds during memory access operations. The vulnerability is particularly dangerous because it operates at kernel level with elevated privileges, allowing potentially malicious user-space applications to leverage this flaw for arbitrary memory reads or writes.
The operational impact of this vulnerability extends far beyond simple memory corruption scenarios. An attacker with non-privileged user access can exploit this condition to gain unauthorized access to kernel memory spaces, potentially reading sensitive information such as cryptographic keys, credentials, or other confidential data stored in kernel memory. The ability to perform out-of-bounds writes opens additional attack vectors for privilege escalation, allowing malicious actors to modify critical kernel structures and potentially achieve full system compromise. This vulnerability directly aligns with several ATT&CK techniques including privilege escalation through kernel exploits and credential access via memory scraping attacks, making it a significant concern for enterprise security infrastructure.
Mitigation strategies for this vulnerability require immediate patching of the affected kernel components and implementation of enhanced memory management validation checks. System administrators should prioritize applying security updates from their operating system vendors as soon as patches become available to address the buffer indexing logic in sparse memory implementations. Additional protective measures include implementing kernel memory protection features such as stack canaries, memory randomization, and address space layout randomization to make exploitation more difficult. The vulnerability also highlights the importance of rigorous code review processes for kernel memory management subsystems and the necessity of comprehensive testing procedures that specifically target edge cases involving large page allocations and sparse memory operations to prevent similar issues from emerging in future implementations.