CVE-2023-53501

In the Linux kernel, the following vulnerability has been resolved: iommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind When unbinding pasid - a race condition exists vs outstanding page faults. To prevent this, the pasid_state object contains a refcount. * set to 1 on pasid bind * incremented on each ppr notification start * decremented on each ppr notification done * decremented on pasid unbind Since refcount_dec assumes that refcount will never reach 0: the current implementation causes the following to be invoked on pasid unbind: REFCOUNT_WARN("decrement hit 0; leaking memory") Fix this issue by changing refcount_dec to refcount_dec_and_test to explicitly handle refcount=1.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/13ed255248dfbbb7f23f9170c7a537fb9ca22c73	Patch
https://git.kernel.org/stable/c/534103bcd52ca9c1fecbc70e717b4a538dc4ded8	Patch
https://git.kernel.org/stable/c/98d86bf32187db27946ca817c2467a5f2f7aa02f	Patch
https://git.kernel.org/stable/c/9ccc51be3126b25cfe9351dbffde946c925cc28a	Patch
https://git.kernel.org/stable/c/a50d60b8f2aff46dd7c7edb4a5835cdc4d432c22	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-10-01 12:15

Updated : 2026-01-23 02:05

NVD link : CVE-2023-53501

Mitre link : CVE-2023-53501

CVE.ORG link : CVE-2023-53501

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

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