Linux Kernel up to 6.2.11 vc Handler fbcon.c set_con2fb_map fbcon_registered_fb/fbcon_display privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.2.11. This issue affects the function set_con2fb_map of the file drivers/video/fbdev/core/fbcon.c of the component vc Handler. Performing a manipulation of the argument fbcon_registered_fb/fbcon_display results in an unknown weakness. This vulnerability is known as CVE-2023-38409. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.2.11 (Operating System). This affects the function set_con2fb_map of the file drivers/video/fbdev/core/fbcon.c of the component vc Handler. The manipulation of the argument fbcon_registered_fb/fbcon_display with an unknown input leads to a unknown weakness. The impact remains unknown. The summary by CVE is:

An issue was discovered in set_con2fb_map in drivers/video/fbdev/core/fbcon.c in the Linux kernel before 6.2.12. Because an assignment occurs only for the first vc, the fbcon_registered_fb and fbcon_display arrays can be desynchronized in fbcon_mode_deleted (the con2fb_map points at the old fb_info).

The weakness was published 07/18/2023. It is possible to read the advisory at cdn.kernel.org. This vulnerability is uniquely identified as CVE-2023-38409 since 07/17/2023. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.2.12 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-42226). 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: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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 6.2.12

Timelineinfo

07/17/2023 🔍
07/18/2023 +1 days 🔍
07/18/2023 +0 days 🔍
01/19/2026 +916 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: cdn.kernel.org
Status: Confirmed

CVE: CVE-2023-38409 (🔍)
GCVE (CVE): GCVE-0-2023-38409
GCVE (VulDB): GCVE-100-234315
EUVD: 🔍

Entryinfo

Created: 07/18/2023 09:39
Updated: 01/19/2026 07:21
Changes: 07/18/2023 09:39 (43), 08/06/2023 18:20 (10), 01/19/2026 07:21 (15)
Complete: 🔍
Cache ID: 216::103

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

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