Linux Kernel net/9p/trans_xen.c xen_9pfs_front_removet use after free

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel. Affected by this vulnerability is the function xen_9pfs_front_removet of the file net/9p/trans_xen.c. This manipulation causes use after free. The identification of this vulnerability is CVE-2023-1859. The attack can only be executed locally. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (affected version not known) and classified as problematic. Affected by this vulnerability is the function xen_9pfs_front_removet of the file net/9p/trans_xen.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A use-after-free flaw was found in xen_9pfs_front_removet in net/9p/trans_xen.c in Xen transport for 9pfs in the Linux Kernel. This flaw could allow a local attacker to crash the system due to a race problem, possibly leading to a kernel information leak.

The weakness was shared 04/14/2023. It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2023-1859 since 04/05/2023. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 247748 (Linux Distros Unpatched Vulnerability : CVE-2023-1859), 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 lore.kernel.org.

The vulnerability is also documented in the databases at Tenable (247748) and EUVD (EUVD-2023-24061). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 247748
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-1859

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: lore.kernel.org

Timelineinfo

04/05/2023 🔍
04/14/2023 +9 days 🔍
04/14/2023 +0 days 🔍
08/13/2025 +852 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2023-1859 (🔍)
GCVE (CVE): GCVE-0-2023-1859
GCVE (VulDB): GCVE-100-226039
EUVD: 🔍

Entryinfo

Created: 04/14/2023 17:30
Updated: 08/13/2025 04:01
Changes: 04/14/2023 17:30 (40), 03/18/2025 20:26 (27), 08/12/2025 03:48 (2), 08/13/2025 04:01 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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