The vulnerability of the vcs_write() function in the drivers/tty/vt/vc-screen.c file of the virtual terminal driver for the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the vcswrite function in the drivers/tty/vt/vc-screen.c file of the Linux kernel virtual terminal driver module is related to pointer manipulation. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2026-74635: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbdev: bitblit: bound-check glyph index in bitcursor bitcursor fetches the glyph under the cursor with c = scrreadwvcpos; src = vcfont.data + c & charmask w height; where charmask is 0x1ff when vchifontmask is set. The screen...

CVE-2026-74635: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: fbdev: bitblit: bound-check glyph index in bitcursor bitcursor fetches the glyph under the cursor with c = scrreadwvcpos; src = vcfont.data + c & charmask w height; where charmask is 0x1ff when vchifontmask is set. The screen...

The vulnerability of the vcs_write() function in the drivers/tty/vt/vc-screen.c file of the Linux kernel-based virtual terminal driver allows a hacker to cause a service failure.

The vulnerability of the vcswrite function in the drivers/tty/vt/vc-screen.c file of the Linux kernel virtual terminal driver module is related to the reutilization of previously freed memory. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2026-53385

A flaw was found in the Linux kernel's vcscreen module. A race condition in the vcswrite function can lead to a null pointer dereference. This occurs when the vcdata pointer becomes stale during concurrent write operations, and a subsequent call attempts to use the now-invalid pointer. A local...

vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write

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CVE-2026-53385 vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write

In the Linux kernel, the following vulnerability has been resolved: vcscreen: fix null-ptr-deref in vcsnotifier during concurrent vcswrite A KASAN null-ptr-deref was observed in vcsnotifier: BUG: KASAN: null-ptr-deref in vcsnotifier+0x98/0x130 Read of size 2 at addr qmpcmdname: qmpcapabilities,...

CVE-2026-53385

In the Linux kernel, the following vulnerability has been resolved: vcscreen: fix null-ptr-deref in vcsnotifier during concurrent vcswrite A KASAN null-ptr-deref was observed in vcsnotifier: BUG: KASAN: null-ptr-deref in vcsnotifier+0x98/0x130 Read of size 2 at addr qmpcmdname: qmpcapabilities,...

CVE-2026-53385: NULL Pointer Dereference

In the Linux kernel, the following vulnerability has been resolved: vcscreen: fix null-ptr-deref in vcsnotifier during concurrent vcswrite A KASAN null-ptr-deref was observed in vcsnotifier: BUG: KASAN: null-ptr-deref in vcsnotifier+0x98/0x130 Read of size 2 at addr qmpcmdname: qmpcapabilities,...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-013107)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013107 advisory. In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-004292)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004292 advisory. vcswrite in drivers/tty/vt/vcscreen.c in the Linux kernel through 5.3.13 does not prevent write access to vcsu devices, aka CID-0c9acb1af77a. Tenable has extracted t...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004402)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004402 advisory. vcswrite in drivers/tty/vt/vcscreen.c in the Linux kernel through 5.3.13 does not prevent write access to vcsu devices, aka CID-0c9acb1af77a. Tenable has extracted t...

SUSE CVE-2023-53747

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

EUVD-2023-60081

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

CVE-2023-53747

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

DEBIAN-CVE-2023-53747

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

UBUNTU-CVE-2023-53747

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

CVE-2023-53747 vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

CVE-2023-53747 vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF

In the Linux kernel, the following vulnerability has been resolved: vcscreen: reload load of struct vcdata pointer in vcswrite to avoid UAF After a call to consoleunlock in vcswrite the vcdata struct can be freed by vcportdestruct. Because of that, the struct vcdata pointer must be reloaded in th...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from a failure to reload the vcdata pointer in vcswrite, which could lead to reuse after release...