CVE-2025-48637

/* * CVE-2025-48637 PoC - Integer Overflow in mem_protect.c * This is a conceptual PoC demonstrating the vulnerability pattern. * Actual exploitation requires specific kernel conditions and offsets. * * WARNING: This code is for educational purposes only. * Do not use for malicious purposes. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> /* Simulated vulnerable function pattern from mem_protect.c */ void vulnerable_mem_protect(unsigned long size, unsigned long count) { unsigned long total_size; void *buffer; /* VULNERABLE: Integer overflow in size calculation */ /* In real kernel code, this could wrap around due to overflow */ total_size = size * count; /* If integer overflow occurs, total_size becomes small */ printf("Calculated size: %lu\n", total_size); /* Allocating based on potentially overflowed size */ buffer = malloc(total_size); if (buffer == NULL) { printf("Allocation failed\n"); return; } /* VULNERABLE: Writing more data than allocated buffer */ /* This simulates out-of-bounds write due to overflow */ memset(buffer, 0x41, size * count * 2); // Write double the allocated size printf("Out-of-bounds write triggered!\n"); free(buffer); } /* Example trigger - in real attack, this would be done via syscall/ioctl */ int main(int argc, char *argv[]) { unsigned long size = 0xFFFFFFFF; /* Max uint32 value */ unsigned long count = 2; printf("CVE-2025-48637 - Integer Overflow PoC\n"); printf("Simulating mem_protect.c vulnerability...\n\n"); /* Trigger the vulnerable code path */ vulnerable_mem_protect(size, count); printf("\nIn real exploitation:\n"); printf("- Attacker would trigger via kernel interface\n"); printf("- Overflow allows writing beyond allocated buffer\n"); printf("- Could lead to privilege escalation\n"); return 0; } /* * For actual kernel exploitation: * 1. Identify vulnerable syscall/ioctl interface * 2. Craft specific size/count values to trigger overflow * 3. Use heap grooming to control overflow target * 4. Overwrite function pointers or metadata * 5. Achieve arbitrary code execution as root * * Note: Modern kernel protections (SMEP, SMAP, KASLR, CFI) * may require additional bypass techniques. */

{"cve": {"id": "CVE-2025-48637", "sourceIdentifier": "[email protected]", "published": "2025-12-08T17:16:19.730", "lastModified": "2025-12-11T15:15:48.113", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In multiple functions of mem_protect.c, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation."}], "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}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "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-190"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-190"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}]}]}], "references": [{"url": "https://android.googlesource.com/kernel/common/+/4cfc9c2d8815577832cafbfcd7f98025f0da718d", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://android.googlesource.com/kernel/common/+/aff2255dbe38dc7c57bac8d3ba9feed989289b20", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://source.android.com/security/bulletin/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}