CVE-2026-43310

Description

In the Linux kernel, the following vulnerability has been resolved: media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC For the i.MX8MQ platform, there is a hardware limitation: the g1 VPU and g2 VPU cannot decode simultaneously; otherwise, it will cause below bus error and produce corrupted pictures, even potentially lead to system hang. [ 110.527986] hantro-vpu 38310000.video-codec: frame decode timed out. [ 110.583517] hantro-vpu 38310000.video-codec: bus error detected. Therefore, it is necessary to ensure that g1 and g2 operate alternately. This allows for successful multi-instance decoding of H.264 and HEVC. To achieve this, g1 and g2 share the same v4l2_m2m_dev, and then the v4l2_m2m_dev can handle the scheduling.

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 (Fixed in commit 286d629d10640bc22f3bf46aa4f356eb7975e862)

Linux Kernel (Fixed in commit e0203ddf9af7c8e170e1e99ce83b4dc07f0cd765)

PoC / Exploit Code

⚠ For Security Research Only

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

python

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>

// Conceptual PoC to trigger the race condition
// This code attempts to simulate concurrent decoding on g1 and g2 VPU

void trigger_decode(int device_fd) {
    // Simulate sending a decode command to the VPU
    // In a real scenario, this involves setting up buffers and calling IOCTLs
    printf("Triggering decode on fd %d\n", device_fd);
    // ioctl(device_fd, VIDIOC_QBUF, ...); 
    // ioctl(device_fd, VIDIOC_STREAMON, ...);
}

int main() {
    // Assume /dev/video0 is g1 and /dev/video1 is g2 on i.MX8MQ
    int g1_fd = open("/dev/video0", O_RDWR);
    int g2_fd = open("/dev/video1", O_RDWR);

    if (g1_fd < 0 || g2_fd < 0) {
        perror("Failed to open video devices");
        return 1;
    }

    printf("Starting concurrent decode attack on VPU...\n");

    // Fork to create simultaneous execution
    if (fork() == 0) {
        trigger_decode(g1_fd); // Child triggers g1
    } else {
        trigger_decode(g2_fd); // Parent triggers g2
    }

    // Wait for crash or timeout
    sleep(5);
    close(g1_fd);
    close(g2_fd);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43310
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43310
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43310/
[4] VulDB https://vuldb.com/cve/CVE-2026-43310
[5] https://git.kernel.org/stable/c/286d629d10640bc22f3bf46aa4f356eb7975e862
[6] https://git.kernel.org/stable/c/e0203ddf9af7c8e170e1e99ce83b4dc07f0cd765

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43310", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T14:16:38.370", "lastModified": "2026-05-15T17:56:06.900", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC\n\nFor the i.MX8MQ platform, there is a hardware limitation: the g1 VPU and\ng2 VPU cannot decode simultaneously; otherwise, it will cause below bus\nerror and produce corrupted pictures, even potentially lead to system hang.\n\n[ 110.527986] hantro-vpu 38310000.video-codec: frame decode timed out.\n[ 110.583517] hantro-vpu 38310000.video-codec: bus error detected.\n\nTherefore, it is necessary to ensure that g1 and g2 operate alternately.\nThis allows for successful multi-instance decoding of H.264 and HEVC.\n\nTo achieve this, g1 and g2 share the same v4l2_m2m_dev, and then the\nv4l2_m2m_dev can handle the scheduling."}], "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-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.19.6", "matchCriteriaId": "2890948B-368D-4087-9F41-F282960708C7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/286d629d10640bc22f3bf46aa4f356eb7975e862", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/e0203ddf9af7c8e170e1e99ce83b4dc07f0cd765", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}