VDB-219337 · CVE-2023-0468 · Nessus 239841

Linux Kernel up to 6.1 RC6 io_uring Subsystem io_uring/poll.c io_poll_check_events null pointer dereference

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4.6	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.1 RC6. This affects the function io_poll_check_events of the file io_uring/poll.c of the component io_uring Subsystem. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2023-0468. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1 RC6 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function io_poll_check_events of the file io_uring/poll.c of the component io_uring Subsystem. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

A use-after-free flaw was found in io_uring/poll.c in io_poll_check_events in the io_uring subcomponent in the Linux Kernel due to a race condition of poll_refs. This flaw may cause a NULL pointer dereference.

The weakness was disclosed 01/27/2023. The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2023-0468 since 01/24/2023. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239841 (TencentOS Server 4: kernel (TSSA-2024:0960)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1 RC7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (239841). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

6.1 RC6

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 239841
Nessus Name: TencentOS Server 4: kernel (TSSA-2024:0960)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.1 RC7

Timelineinfo

01/24/2023 🔍
01/27/2023 +3 days 🔍
01/27/2023 +0 days 🔍
06/19/2025 +874 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2023-0468 (🔍)
GCVE (CVE): GCVE-0-2023-0468
GCVE (VulDB): GCVE-100-219337

Entryinfo

Created: 01/27/2023 07:46
Updated: 06/19/2025 19:59
Changes: 01/27/2023 07:46 (43), 02/19/2023 14:54 (9), 04/02/2025 00:28 (16), 06/19/2025 19:59 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.