CVE-2025-22031

System interruption via unchecked PCI bridge pointer

Published Apr 16, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 6.13 allows local users to interrupt the system during PCIe bandwidth-control probing. The bandwidth controller calls link-speed handling with the bridge's NULL subordinate bus pointer instead of rejecting the unusable bridge. Post-boot triggering requires root access to PCI rescan sysfs files and a BIOS or hardware state that exhausts bus numbers, a condition outside attacker control.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel 6.13 allows local users to interrupt the system during PCIe bandwidth-control probing. The bandwidth controller calls link-speed handling with the bridge's NULL subordinate bus pointer instead of rejecting the unusable bridge. Post-boot triggering requires root access to PCI rescan sysfs files and a BIOS or hardware state that exhausts bus numbers, a condition outside attacker control.

The record

CVE
CVE-2025-22031
Published
Apr 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.13
  2. Affected versionversion=665745f274870c921020f610e2c99a3b1613519b <1181924af78e5299ddec6e457789c02dd5966559
  3. Affected versionversion=665745f274870c921020f610e2c99a3b1613519b <667f053b05f00a007738cd7ed6fa1901de19dc7e
  4. Affected versionversion=665745f274870c921020f610e2c99a3b1613519b <d93d309013e89631630a12b1770d27e4be78362a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=665745f274870c921020f610e2c99a3b1613519b <1181924af78e5299ddec6e457789c02dd5966559; version=665745f274870c921020f610e2c99a3b1613519b <667f053b05f00a007738cd7ed6fa1901de19dc7e; version=665745f274870c921020f610e2c99a3b1613519b <d93d309013e89631630a12b1770d27e4be78362a

Published CVSS scores

5.5UbuntuCVSS: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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499.004Application or System Exploitation Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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