Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:EOL][EOL]fbcon: Make sure modelist not set on unregistered console[EOL][EOL]It looks like attempting to write to the "store_modes" sysfs node will[EOL]run afoul of unregistered consoles:[EOL][EOL]UBSAN: array-index-out-of-bounds in drivers/video/fbdev/core/fbcon.c:122:28[EOL]index -1 is out of range for type 'fb_info *[32]'[EOL]...[EOL] fbcon_info_from_console+0x192/0x1a0 drivers/video/fbdev/core/fbcon.c:122[EOL] fbcon_new_modelist+0xbf/0x2d0 drivers/video/fbdev/core/fbcon.c:3048[EOL] fb_new_modelist+0x328/0x440 drivers/video/fbdev/core/fbmem.c:673[EOL] store_modes+0x1c9/0x3e0 drivers/video/fbdev/core/fbsysfs.c:113[EOL] dev_attr_store+0x55/0x80 drivers/base/core.c:2439[EOL][EOL]static struct fb_info *fbcon_registered_fb[FB_MAX];[EOL]...[EOL]static signed char con2fb_map[MAX_NR_CONSOLES];[EOL]...[EOL]static struct fb_info *fbcon_info_from_console(int console)[EOL]...[EOL]        return fbcon_registered_fb[con2fb_map[console]];[EOL][EOL]If con2fb_map contains a -1 things go wrong here. Instead, return NULL,[EOL]as callers of fbcon_info_from_console() are trying to compare against[EOL]existing "info" pointers, so error handling should kick in correctly.

CREATE(Triage):(User=admin) [CVE-2025-38198 (https://nvd.nist.gov/vuln/detail/CVE-2025-38198)