Xen on Linux Netback null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Xen on Linux. It has been declared as critical. Affected is an unknown function of the component Netback Handler. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2023-46838. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in Xen on Linux (Virtualization Software) (version now known). Affected is some unknown processing of the component Netback Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability.

The weakness was disclosed 01/22/2024. The advisory is shared for download at xenbits.xen.org. This vulnerability is traded as CVE-2023-46838 since 10/27/2023. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 250056 (Linux Distros Unpatched Vulnerability : CVE-2023-46838), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org.

The vulnerability is also documented in the databases at Tenable (250056) and EUVD (EUVD-2023-51004). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 250056
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-46838

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: xenbits.xen.org

Timelineinfo

10/27/2023 🔍
01/22/2024 +87 days 🔍
01/22/2024 +0 days 🔍
08/17/2025 +573 days 🔍

Sourcesinfo

Advisory: FEDORA-2024-0f89e13079
Status: Confirmed

CVE: CVE-2023-46838 (🔍)
GCVE (CVE): GCVE-0-2023-46838
GCVE (VulDB): GCVE-100-251712
EUVD: 🔍

Entryinfo

Created: 01/22/2024 19:52
Updated: 08/17/2025 15:55
Changes: 01/22/2024 19:52 (39), 02/16/2024 09:47 (2), 02/16/2024 09:49 (11), 06/26/2024 01:56 (15), 06/03/2025 00:44 (2), 08/17/2025 15:55 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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