CVE-2020-25668Race Condition in Kernel

Severity
7.0HIGHNVD
OSV8.2OSV5.5OSV4.1
EPSS
0.1%
top 67.61%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedMay 26
Latest updateDec 1

Description

A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages5 packages

NVDlinux/linux_kernel4.54.9.242+5
Debianlinux/linux_kernel< 5.9.6-1+3
Ubuntulinux/linux_kernel< 4.4.0-198.230+2
CVEListV5linux/linux_kernel5.9.2
debiandebian/linux< linux 5.9.6-1 (bookworm)

Also affects: Debian Linux 9.0

Patches

🔴Vulnerability Details

6
OSV
CVE-2020-25668: In vt_disallocate and related functions of vt_ioctl2021-12-01
OSV
CVE-2020-25668: A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font2021-05-26
OSV
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oracle, linux-raspi vulnerabilities2021-02-25
OSV
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities2021-01-06
OSV
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabi2021-01-06

📋Vendor Advisories

6
Ubuntu
Linux kernel vulnerabilities2021-02-25
Ubuntu
Linux kernel vulnerabilities2021-01-06
Ubuntu
Linux kernel vulnerabilities2021-01-06
Ubuntu
Linux kernel vulnerabilities2021-01-06
Red Hat
kernel: race condition in fg_console can lead to use-after-free in con_font_op2020-10-30

💬Community

2
Bugzilla
CVE-2020-25668 kernel: race condition in fg_console can lead to use-after-free in con_font_op2020-10-30
Bugzilla
CVE-2020-25668 kernel: race condition in fg_console can lead to use-after-free in con_font_op [fedora-all]2020-10-30
CVE-2020-25668 — Race Condition in Linux Kernel | cvebase