CVE-2025-71313

System crash via unchecked workqueue allocation

Published Jun 3, 2026 · Updated Jun 3, 2026

NULL pointer dereference in Linux Kernel 5.12 through 6.19.3 allows local users to crash the system during PCI endpoint setup. In epf_ntb_epc_init(), the driver accepts a NULL return from alloc_workqueue() and later passes that invalid workqueue pointer to queue_work(). Reaching the fault requires CAP_SYS_MODULE or root access to load pci-epf-ntb or pci-epf-vntb and an allocation failure during initialization.

CVSS severity5.5
Medium
EPSS probability0.11%
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 5.12 through 6.19.3 allows local users to crash the system during PCI endpoint setup. In epf_ntb_epc_init(), the driver accepts a NULL return from alloc_workqueue() and later passes that invalid workqueue pointer to queue_work(). Reaching the fault requires CAP_SYS_MODULE or root access to load pci-epf-ntb or pci-epf-vntb and an allocation failure during initialization.

The record

CVE
CVE-2025-71313
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=5.12
  2. Affected versionversion=8b821cf761503b80d0bd052f932adfe1bc1a0088 <03f336a869b3a3f119d3ae52ac9723739c7fb7b6
  3. Affected versionversion=8b821cf761503b80d0bd052f932adfe1bc1a0088 <314eab6740bcda504ef978be599f805de05ce6de

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.12; version=8b821cf761503b80d0bd052f932adfe1bc1a0088 <03f336a869b3a3f119d3ae52ac9723739c7fb7b6; version=8b821cf761503b80d0bd052f932adfe1bc1a0088 <314eab6740bcda504ef978be599f805de05ce6de

Published CVSS scores

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

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

CWE-476NULL Pointer Dereference
T1499Endpoint 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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