CVE-2026-45880

Device-removal hang via leaked pgmap reference

Published May 27, 2026 · Updated May 27, 2026

Denial of service in Linux Kernel allows local users to hang PCI device removal through a failed P2P memory mapping. In p2pmem_alloc_mmap(), a vm_insert_page() failure leaves the pgmap reference acquired after gen_pool_alloc_owner() unreleased, so memunmap_pages() waits forever. Access to the root-owned p2pmem allocate interface requires root or root-group membership, and the consequence is confined to device removal.

CVSS severity5.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux Kernel allows local users to hang PCI device removal through a failed P2P memory mapping. In p2pmem_alloc_mmap(), a vm_insert_page() failure leaves the pgmap reference acquired after gen_pool_alloc_owner() unreleased, so memunmap_pages() waits forever. Access to the root-owned p2pmem allocate interface requires root or root-group membership, and the consequence is confined to device removal.

The record

CVE
CVE-2026-45880
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.2
  2. Affected versionversion=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <51b7181cfbedf289ce794b6d97a1c596c309ec38
  3. Affected versionversion=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <6220694c52a5a04102b48109e4f24e958b559bd3
  4. Affected versionversion=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <a1f4dc72efc3204db95d052058d785cad7ce755f
  5. Affected versionversion=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <baa42b756d183a59572f3890981a3d32b8d05d40
  6. Affected versionversion=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <e19cce88ec4c4877f4ff2469099b9cf23cc3e93e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.2; version=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <51b7181cfbedf289ce794b6d97a1c596c309ec38; version=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <6220694c52a5a04102b48109e4f24e958b559bd3; version=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <a1f4dc72efc3204db95d052058d785cad7ce755f; version=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <baa42b756d183a59572f3890981a3d32b8d05d40; version=7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 <e19cce88ec4c4877f4ff2469099b9cf23cc3e93e

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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