kernel: fbcon: Set fb_display[i]->mode to NULL when the mode is released

A use-after-free vulnerability was identified in the Linux kernel framebuffer console fbcon subsystem. During framebuffer unregistration, the kernel freed the memory for a display mode but did not clear the corresponding fbdisplayi-mode pointer. Subsequent framebuffer ioctl operations could then...

kernel: fbcon: Set fb_display[i]->mode to NULL when the mode is released

A use-after-free vulnerability was identified in the Linux kernel framebuffer console fbcon subsystem. During framebuffer unregistration, the kernel freed the memory for a display mode but did not clear the corresponding fbdisplayi-mode pointer. Subsequent framebuffer ioctl operations could then...

CVE-2026-74424: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbcon: fix NULL pointer dereference for a console without vcdata fbconnewmodelist runs when a framebuffer's modelist changes. For each console mapped to it with fbdisplayi.mode set, it reads vcconsi.d and passes the vcnum to...

CVE-2026-63826: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbdev: fix use-after-free in storemodes storemodes replaces a framebuffer's modelist with modes from userspace. On success it frees the old modelist with fbdestroymodelist. Two fields still point into that freed list. One pointer...

CVE-2026-63826: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbdev: fix use-after-free in storemodes storemodes replaces a framebuffer's modelist with modes from userspace. On success it frees the old modelist with fbdestroymodelist. Two fields still point into that freed list. One pointer...

Linux kernel security vulnerabilities

The Linux kernel contains a security vulnerability stemming from a use-after-free issue in storemodes. When replacing framebuffer modelists, the fbdisplayi.mode and fbinfo-mode pointers still point to an already freed list, potentially leading to use-after-free conditions...

SUSE CVE-2025-40323

In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fbdisplayi-mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fbmodeisequal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by...

CVE-2025-40323

In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fbdisplayi-mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fbmodeisequal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by...

CVE-2025-40323

CVE-2025-40323: The issue affects the Linux kernel fbcon framebuffer handling. A use-after-free can occur because during framebuffer unregistration only fb_info->modelist memory is freed, while fb_display[i]->mode is not NULL’d for the freed modes. This can lead to dereferencing a freed poi...

CVE-2025-40323

In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fbdisplayi-mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fbmodeisequal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by...

CVE-2025-40323: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fbdisplayi-mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fbmodeisequal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by...

CVE-2025-40323: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fbdisplayi-mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fbmodeisequal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by...