CVE-2025-21995

drm/sched: Fix fence reference count leak

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved: drm/sched: Fix fence reference count leak The last_scheduled fence leaks when an entity is being killed and adding
the cleanup callback fails. Decrement the reference count of prev when dma_fence_add_callback()
fails, ensuring proper balance. [phasta: add git tag info for stable kernel]

In the Linux kernel, the following vulnerability has been resolved: drm/sched: Fix fence reference count leak The last_scheduled fence leaks when an entity is being killed and adding the cleanup callback fails. Decrement the reference count of prev when dma_fence_add_callback() fails, ensuring proper balance. [phasta: add git tag info for stable kernel]

The SUSE Linux Enterprise 15 SP6 Azure kernel was updated to receive various security bug fixes.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2024-12-29 CVE Reserved
2025-04-03 CVE Published
2025-05-04 CVE Updated
2025-06-10 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/2fdb8a8f07c2f1353770a324fd19b8114e4329ac	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/c76bd3c99293834de7d1dca5de536616d5655e38	2025-03-28
https://git.kernel.org/stable/c/1135a9431160575466ea9ac37ebd756ecbe35fff	2025-03-28
https://git.kernel.org/stable/c/35399c84dcedd6d31448fb9e1336ef52673f2882	2025-03-28
https://git.kernel.org/stable/c/a952f1ab696873be124e31ce5ef964d36bce817f	2025-03-13

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.2 < 6.6.85 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.6.85"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.2 < 6.12.21 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.12.21"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.2 < 6.13.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.13.9"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.2 < 6.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.14"		en		Affected