Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges()… (CVE-2026-45853)
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges() amdgpu_discovery_get_nps_info() internally allocates memory for ranges using kvcalloc(), which may use vmalloc() for large allocation. Using kfree() to release vmalloc memory will lead to a memory corruption. Use kvfree() to safely handle both kmalloc and vmalloc allocations. Compile tested only. Issue found using a prototype static analysis tool and code review.
AI Analysis
Technical Summary
The Linux kernel AMDGPU driver contained a memory corruption vulnerability due to improper deallocation of memory allocated by kvcalloc() in amdgpu_discovery_get_nps_info(). Since kvcalloc() may use vmalloc() for large allocations, using kfree() to free such memory is unsafe and leads to memory corruption. The fix replaces kfree() with kvfree(), which correctly handles both kmalloc and vmalloc allocated memory. This vulnerability is tracked as CVE-2026-45853 and was discovered via static analysis and code review. It has been resolved in the kernel source.
Potential Impact
The vulnerability can lead to memory corruption in the AMDGPU driver, which may result in system instability, crashes, or potential escalation of privileges due to corrupted kernel memory. The CVSS vector indicates local attack vector with low complexity and low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in the Linux kernel source that replaces kfree() with kvfree() in the affected function. Users and administrators should update to the fixed kernel version containing this patch. Since this is a kernel-level vulnerability, applying the official kernel update is the recommended mitigation.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges()… (CVE-2026-45853)
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges() amdgpu_discovery_get_nps_info() internally allocates memory for ranges using kvcalloc(), which may use vmalloc() for large allocation. Using kfree() to release vmalloc memory will lead to a memory corruption. Use kvfree() to safely handle both kmalloc and vmalloc allocations. Compile tested only. Issue found using a prototype static analysis tool and code review.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel AMDGPU driver contained a memory corruption vulnerability due to improper deallocation of memory allocated by kvcalloc() in amdgpu_discovery_get_nps_info(). Since kvcalloc() may use vmalloc() for large allocations, using kfree() to free such memory is unsafe and leads to memory corruption. The fix replaces kfree() with kvfree(), which correctly handles both kmalloc and vmalloc allocated memory. This vulnerability is tracked as CVE-2026-45853 and was discovered via static analysis and code review. It has been resolved in the kernel source.
Potential Impact
The vulnerability can lead to memory corruption in the AMDGPU driver, which may result in system instability, crashes, or potential escalation of privileges due to corrupted kernel memory. The CVSS vector indicates local attack vector with low complexity and low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in the Linux kernel source that replaces kfree() with kvfree() in the affected function. Users and administrators should update to the fixed kernel version containing this patch. Since this is a kernel-level vulnerability, applying the official kernel update is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f6wq-h8g2-9j9p
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-45853"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a3ef7f227e9c79719036e36
Added to database: 06/26/2026, 22:06:42 UTC
Last enriched: 06/26/2026, 22:51:53 UTC
Last updated: 07/31/2026, 19:30:24 UTC
Views: 58
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