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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-74424 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: fbcon: fix NULL pointer dereference for a console without vc_data fbcon_new_modelist() runs when a framebuffer's modelist changes. For each console mapped to it with fb_display[i].mode set, it reads vc_cons[i].d and passes the vc_num to fbcon_set_disp(). This assumes a console with a mode set has a vc_data, but it can be NULL. fbcon_set_disp() sets fb_display[i].mode before it checks vc_data, and fbcon_deinit() leaves the mode set after the vc_data is freed. fbcon_new_modelist() then dereferences the NULL vc_data. Keep fb_display[i].mode set only while the console has a vc_data. Check vc_data before setting the mode in fbcon_set_disp(), and clear the mode in fbcon_deinit(). The existing mode check in fbcon_new_modelist() then skips such consoles.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/5fae9a928482d4845bca169a3a098789203a1ca4 kernel.org
https://git.kernel.org/stable/c/6617df8c246311c82cebf061a4cee55b9df60922 kernel.org
https://git.kernel.org/stable/c/8e9b8b008f4036df0318870c5d754134ff1b94cc kernel.org
https://git.kernel.org/stable/c/9b783b7e03dc78ec102edf618259a2b55911fc6a kernel.org
https://git.kernel.org/stable/c/ac970358c5ca0775841bd2a56ce15dc464b99003 kernel.org
https://git.kernel.org/stable/c/b134ad2f7c06b3c1098dcc95008e2045ff4b49b2 kernel.org
https://git.kernel.org/stable/c/cc4382dc5134826a3936a6b08de17f7dc7abe232 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-74424
NVD Published Date:
08/15/2026
NVD Last Modified:
08/18/2026
Source:
kernel.org