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.
References
Configurations
Configuration 1 (hide)
|
History
23 Jan 2026, 02:05
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
| CWE | NVD-CWE-Other | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/13ed255248dfbbb7f23f9170c7a537fb9ca22c73 - Patch | |
| References | () https://git.kernel.org/stable/c/534103bcd52ca9c1fecbc70e717b4a538dc4ded8 - Patch | |
| References | () https://git.kernel.org/stable/c/98d86bf32187db27946ca817c2467a5f2f7aa02f - Patch | |
| References | () https://git.kernel.org/stable/c/9ccc51be3126b25cfe9351dbffde946c925cc28a - Patch | |
| References | () https://git.kernel.org/stable/c/a50d60b8f2aff46dd7c7edb4a5835cdc4d432c22 - Patch |
01 Oct 2025, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
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