In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: Fix kfd process ref leaking when userptr unmapping

kfd_lookup_process_by_pid hold the kfd process reference to ensure it
doesn't get destroyed while sending the segfault event to user space.

Calling kfd_lookup_process_by_pid as function parameter leaks the kfd
process refcount and miss the NULL pointer check if app process is
already destroyed.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00027.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
2d274bf7099bc5e95fabaa93f23d0eb2977187ad affected < 60f6112fc9b3ba0eae519f10702c0c13bab45742
2d274bf7099bc5e95fabaa93f23d0eb2977187ad affected < 58e6fc2fb94f0f409447e5d46cf6a417b6397fbc
Linux Linux affected
Version Status Constraints
6.16 affected —
0 unaffected < 6.16
6.17.4 unaffected ≤ 6.17.*
6.18 unaffected ≤ *

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/58e6fc2fb94f0f409447e5d46cf6a417b6397fbc cve-icon cve-icon
https://git.kernel.org/stable/c/60f6112fc9b3ba0eae519f10702c0c13bab45742 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025111245-CVE-2025-40191-1ea5@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40191 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40191 cve-icon
History

Mon, 01 Dec 2025 06:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Fri, 14 Nov 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Thu, 13 Nov 2025 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Wed, 12 Nov 2025 22:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix kfd process ref leaking when userptr unmapping kfd_lookup_process_by_pid hold the kfd process reference to ensure it doesn't get destroyed while sending the segfault event to user space. Calling kfd_lookup_process_by_pid as function parameter leaks the kfd process refcount and miss the NULL pointer check if app process is already destroyed.
Title drm/amdkfd: Fix kfd process ref leaking when userptr unmapping
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-01T06:19:50.769Z

Reserved: 2025-04-16T07:20:57.177Z

Link: CVE-2025-40191

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-11-12T22:15:46.080

Modified: 2025-11-14T16:42:30.503

Link: CVE-2025-40191

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-11-12T00:00:00Z

Links: CVE-2025-40191 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-11-13T09:52:16Z

Weaknesses

No weakness.