The vulnerability of the hvfb_putmem() function in the drivers/video/fbdev/hyperv_fb.c driver module allows a hacker to cause a service failure.

The vulnerability of the hvfbputmem function in the drivers/video/fbdev/hypervfb.c driver for supporting kernel frame buffer devices in the Linux operating system is related to the copying of buffers without checking the size of the input data a classic buffer overflow attack. Exploiting this...

kernel: fbdev: hyperv_fb: Allow graceful removal of framebuffer

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Allow graceful removal of framebuffer When a Hyper-V framebuffer device is unbind, hypervfb driver tries to release the framebuffer forcefully. If this framebuffer is in use it produce the following WARN and henc...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Allow graceful removal of framebuffer When a Hyper-V framebuffer device is unbound, the hypervfb driver attempts to forcibly release the framebuffer. If the framebuffer is still in use, it produces a warning, and...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Fixed a hang that occurred in the kdump kernel when running on Hyper-V Gen 2 VMs. Hyper-V Gen 2 VMs boot via EFI and have a standard EFI framebuffer device. When the kdump kernel runs in such a VM, loading the...

AZL-62824 CVE-2025-21976 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Allow graceful removal of framebuffer When a Hyper-V framebuffer device is unbind, hypervfb driver tries to release the framebuffer forcefully. If this framebuffer is in use it produce the following WARN and henc...

AZL-69506 CVE-2025-21976 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Allow graceful removal of framebuffer When a Hyper-V framebuffer device is unbind, hypervfb driver tries to release the framebuffer forcefully. If this framebuffer is in use it produce the following WARN and henc...

DEBIAN-CVE-2025-21976

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Allow graceful removal of framebuffer When a Hyper-V framebuffer device is unbind, hypervfb driver tries to release the framebuffer forcefully. If this framebuffer is in use it produce the following WARN and henc...

UBUNTU-CVE-2025-21976

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Allow graceful removal of framebuffer When a Hyper-V framebuffer device is unbind, hypervfb driver tries to release the framebuffer forcefully. If this framebuffer is in use it produce the following WARN and henc...

UBUNTU-CVE-2025-21977

In the Linux kernel, the following vulnerability has been resolved: fbdev: hypervfb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs Gen 2 Hyper-V VMs boot via EFI and have a standard EFI framebuffer device. When the kdump kernel runs in such a VM, loading the efifb driver may hang because of...