CVE-2026-45880 Details
Description
In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap() doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when trying to remove the PCI device. Fix it by adding the missed percpu_ref_put().
A vulnerability in the Linux kernel's PCI/P2PDMA handling has been addressed. The issue arose in the 'p2pmem_alloc_mmap()' function, where the 'vm_insert_page()' call could fail. In such cases, the function did not properly release the per-CPU reference of the 'pgmap' object, which had been allocated through 'gen_pool_alloc_owner()'. This oversight caused the 'memunmap_pages()' function to hang indefinitely when attempting to remove the associated PCI device. The vulnerability has been fixed by adding the missing reference release.
Users can apply the latest patches from the Linux kernel stable tree to address this vulnerability. The specific commit that resolves the issue is '6220694c52a5a04102b48109e4f24e958b559bd3', which can be downloaded as part of the Linux kernel stable release.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f | kernel.org | Patch |
| https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |