Linux Kernel up to 6.19.3 PCI alloc_workqueue null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k1.54-

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.19.3. Affected by this issue is the function alloc_workqueue of the component PCI. The manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2025-71313. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.3. It has been rated as critical. This issue affects the function alloc_workqueue of the component PCI. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: Add missing NULL check for alloc_workqueue() alloc_workqueue() can return NULL on memory allocation failure. Without proper error checking, this may lead to a NULL pointer dereference when queue_work() is later called with the NULL workqueue pointer in epf_ntb_epc_init(). Add a NULL check immediately after alloc_workqueue() and return -ENOMEM on failure to prevent the driver from loading with an invalid workqueue pointer.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-71313 since 05/27/2026. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.19.4 eliminates this vulnerability. Applying the patch 314eab6740bcda504ef978be599f805de05ce6de/03f336a869b3a3f119d3ae52ac9723739c7fb7b6 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.19.4
Patch: 314eab6740bcda504ef978be599f805de05ce6de/03f336a869b3a3f119d3ae52ac9723739c7fb7b6

Timelineinfo

05/27/2026 CVE reserved
06/03/2026 +7 days Advisory disclosed
06/03/2026 +0 days VulDB entry created
06/03/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71313 (🔒)
GCVE (CVE): GCVE-0-2025-71313
GCVE (VulDB): GCVE-100-368171

Entryinfo

Created: 06/03/2026 21:06
Changes: 06/03/2026 21:06 (59)
Complete: 🔍
Cache ID: 216::103

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