CVE-2026-45880

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

MEDIUM

5.5

CVSS Score

Published: May 27, 2026 at 12:16 PM UTC

Updated: June 27, 2026 at 11:41 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

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().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

6.13 ≤ v < 6.18.146.19 ≤ v < 6.19.46.2 ≤ v < 6.12.756.2 ≤ v < 6.18.146.2 ≤ v < 6.19.46.2 ≤ v < 6.6.1286.2 ≤ v < 7.06.7 ≤ v < 6.12.756.27e9c7ef83d785236f5a8c3761dd053fae9b92fb8

Vendor states this is fixed in 51b7181cfbedf289ce794b6d97a1c596c309ec38 (fixed)

Vendor states this is fixed in 6220694c52a5a04102b48109e4f24e958b559bd3 (fixed)

Vendor states this is fixed in a1f4dc72efc3204db95d052058d785cad7ce755f (fixed)

Vendor states this is fixed in baa42b756d183a59572f3890981a3d32b8d05d40 (fixed)

Vendor states this is fixed in e19cce88ec4c4877f4ff2469099b9cf23cc3e93e (fixed)

Vendor states this is fixed in 6.12.75 (unaffected)

Vendor states this is fixed in 6.18.14 (unaffected)

Vendor states this is fixed in 6.19.4 (unaffected)

Vendor states this is fixed in 6.2 (unaffected)

Vendor states this is fixed in 6.6.128 (unaffected)

Vendor states this is fixed in 7.0 (unaffected)