CVE-2025-71298

Description

In the Linux kernel, the following vulnerability has been resolved: drm/tests: shmem: Hold reservation lock around madvise Acquire and release the GEM object's reservation lock around calls to the object's madvide operation. The tests use drm_gem_shmem_madvise_locked(), which led to errors such as show below. [ 58.339389] WARNING: CPU: 1 PID: 1352 at drivers/gpu/drm/drm_gem_shmem_helper.c:499 drm_gem_shmem_madvise_locked+0xde/0x140 Only export the new helper drm_gem_shmem_madvise() for Kunit tests. This is not an interface for regular drivers.

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 (Git commit 07cfcab370da06f26c273306571cbb0bfa3b9c52 之前版本)

Linux Kernel (Git commit 607d07d8cc0b835a8701259f08a03dc149b79b4f 之前版本)

PoC / Exploit Code

⚠ For Security Research Only

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

python

/*
 * PoC Concept: Triggering the lock warning in drm_gem_shmem_madvise_locked
 * This requires a local environment with the vulnerable kernel configuration.
 */

#include <linux/module.h>
#include <drm/drm_gem_shmem_helper.h>

// Simulating the test condition that triggers the vulnerability
static int __init poc_init(void)
{
    struct drm_gem_shmem_object *shmem;
    int ret;

    // Allocate a shmem object (simplified)
    // In a real scenario, this involves interacting with the DRM subsystem
    // to create an object and then calling madvise without the lock.
    
    // The vulnerable call path:
    // drm_gem_shmem_madvise_locked(shmem, 0);
    
    // This would trigger the warning:
    // "WARNING: CPU: x PID: x at drivers/gpu/drm/drm_gem_shmem_helper.c:499"
    
    return 0;
}

static void __exit poc_exit(void)
{
}

module_init(poc_init);
module_exit(poc_exit);
MODULE_LICENSE("GPL");

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-71298
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-71298
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-71298/
[4] VulDB https://vuldb.com/cve/CVE-2025-71298
[5] https://git.kernel.org/stable/c/07cfcab370da06f26c273306571cbb0bfa3b9c52
[6] https://git.kernel.org/stable/c/607d07d8cc0b835a8701259f08a03dc149b79b4f
[7] https://git.kernel.org/stable/c/9cc77691b5fd615625955cedf726da57543088f1

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-71298", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T14:16:31.153", "lastModified": "2026-05-14T19:21:09.073", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/tests: shmem: Hold reservation lock around madvise\n\nAcquire and release the GEM object's reservation lock around calls\nto the object's madvide operation. The tests use\ndrm_gem_shmem_madvise_locked(), which led to errors such as show below.\n\n[ 58.339389] WARNING: CPU: 1 PID: 1352 at drivers/gpu/drm/drm_gem_shmem_helper.c:499 drm_gem_shmem_madvise_locked+0xde/0x140\n\nOnly export the new helper drm_gem_shmem_madvise() for Kunit tests.\nThis is not an interface for regular drivers."}], "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": "6.16", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4562EDA-AFEA-4C62-97CC-C83E109A5F19"}, {"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/07cfcab370da06f26c273306571cbb0bfa3b9c52", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/607d07d8cc0b835a8701259f08a03dc149b79b4f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9cc77691b5fd615625955cedf726da57543088f1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}