Medium 5.5Published May 27, 2026

CVE-2026-45880PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails

Updated under an hour ago (Oct 27, 2026, 2:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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().

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 before baa42b756d183a59572f3890981a3d32b8d05d40; from 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 before 51b7181cfbedf289ce794b6d97a1c596c309ec38; from 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 before e19cce88ec4c4877f4ff2469099b9cf23cc3e93e; from 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 before a1f4dc72efc3204db95d052058d785cad7ce755f; from 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 before 6220694c52a5a04102b48109e4f24e958b559bd3	CNA record
linux linux_kernel linux:linux_kernel	from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4	NVD

References

References

https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40	patch
https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38	patch
https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e	patch
https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f	patch
https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.