CVE-2026-45880

MediumCVSS 5.5/10Last modified Nov 6, 2026

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().

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8, < baa42b756d183a59572f3890981a3d32b8d05d40; >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8, < 51b7181cfbedf289ce794b6d97a1c596c309ec38; >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8, < e19cce88ec4c4877f4ff2469099b9cf23cc3e93e; >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8, < a1f4dc72efc3204db95d052058d785cad7ce755f; >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8, < 6220694c52a5a04102b48109e4f24e958b559bd3
LinuxLinux6.2

References

Timeline

Published
May 27, 2026
Last modified
Nov 6, 2026
NVD status
Analyzed

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CVE-2026-45880: Medium severity, CVSS 5.5 | Vulnix