Unrated severityNVD Advisory· Published May 27, 2026· Updated May 27, 2026
CVE-2026-45880
CVE-2026-45880
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().
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Affected products
2Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38nvd
- git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3nvd
- git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755fnvd
- git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40nvd
- git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93envd
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