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.

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No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00161.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/5fae9a928482d4845bca169a3a098789203a1ca4 cve-icon cve-icon
https://git.kernel.org/stable/c/6617df8c246311c82cebf061a4cee55b9df60922 cve-icon cve-icon
https://git.kernel.org/stable/c/8e9b8b008f4036df0318870c5d754134ff1b94cc cve-icon cve-icon
https://git.kernel.org/stable/c/9b783b7e03dc78ec102edf618259a2b55911fc6a cve-icon cve-icon
https://git.kernel.org/stable/c/ac970358c5ca0775841bd2a56ce15dc464b99003 cve-icon cve-icon
https://git.kernel.org/stable/c/b134ad2f7c06b3c1098dcc95008e2045ff4b49b2 cve-icon cve-icon
https://git.kernel.org/stable/c/cc4382dc5134826a3936a6b08de17f7dc7abe232 cve-icon cve-icon
History

Sat, 15 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Sat, 15 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
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.
Title fbcon: fix NULL pointer dereference for a console without vc_data
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:59:27.179Z

Reserved: 2026-08-15T05:44:03.894Z

Link: CVE-2026-74424

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:44.480

Modified: 2026-08-15T06:22:44.480

Link: CVE-2026-74424

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T16:15:03Z