CVE-2026-34850

#include <stdio.h> #include <pthread.h> #include <unistd.h> // Conceptual PoC for Race Condition in Notification Service // Simulating a TOCTOU (Time-of-Check to Time-of-Use) scenario int shared_resource = 1; void* malicious_thread(void* arg) { while(1) { // Rapidly toggle the resource state to cause inconsistency shared_resource = 0; usleep(100); // Microsecond delay to create window shared_resource = 1; } return NULL; } void* service_thread(void* arg) { while(1) { // Service checks the resource state if (shared_resource == 1) { // Simulate operation assuming state is valid printf("Service operating normally...\n"); } else { // Crash triggered due to unexpected state printf("[!] Service crashed: Race condition detected!\n"); break; } usleep(200); } return NULL; } int main() { pthread_t t1, t2; // Create threads simulating attacker and service pthread_create(&t1, NULL, malicious_thread, NULL); pthread_create(&t2, NULL, service_thread, NULL); pthread_join(t2, NULL); pthread_cancel(t1); return 0; }

{"cve": {"id": "CVE-2026-34850", "sourceIdentifier": "[email protected]", "published": "2026-04-13T04:16:07.767", "lastModified": "2026-04-16T05:05:25.157", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Race condition vulnerability in the notification service.\nImpact: Successful exploitation of this vulnerability may affect availability."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L", "baseScore": 1.9, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 0.5, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-362"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*", "matchCriteriaId": "E39DE6A6-CBE6-4086-93CD-113D1B3BA730"}, {"vulnerable": true, "criteria": "cpe:2.3:o:huawei:harmonyos:6.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "0EBE30DD-E146-4A6A-BE68-DEF9D4D0B2A8"}]}]}], "references": [{"url": "https://consumer.huawei.com/en/support/bulletin/2026/4/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://consumer.huawei.com/en/support/bulletinlaptops/2026/4/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}