CVE-2021-20261

A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the floppy device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw.
Race Condition
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.4 MEDIUM
LOCAL
HIGH
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
redhatCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
VendorProductVersion
linuxlinux_kernel
𝑥
< 4.5
linuxlinux_kernel
4.5
linuxlinux_kernel
4.5:rc1
linuxlinux_kernel
4.5:rc2
linuxlinux_kernel
4.5:rc3
linuxlinux_kernel
4.5:rc4
redhatenterprise_linux
7.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.226-1
fixed
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
sid
6.11.5-1
fixed
trixie
6.11.5-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
groovy
not-affected
focal
not-affected
bionic
not-affected
xenial
Fixed 4.4.0-207.239
released
trusty
ignored
linux-aws
groovy
not-affected
focal
not-affected
bionic
not-affected
xenial
Fixed 4.4.0-1126.140
released
trusty
Fixed 4.4.0-1090.94
released
linux-aws-5.0
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-aws-5.3
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-aws-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-aws-hwe
groovy
dne
focal
dne
bionic
dne
xenial
not-affected
trusty
dne
linux-azure
groovy
not-affected
focal
not-affected
bionic
ignored
xenial
not-affected
trusty
ignored
linux-azure-4.15
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-5.3
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-azure-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-edge
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-dell300x
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp
groovy
not-affected
focal
not-affected
bionic
ignored
xenial
not-affected
trusty
dne
linux-gcp-4.15
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-5.3
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gcp-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-edge
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gke-4.15
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gke-5.0
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gke-5.3
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gke-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gkeop
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-gkeop-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe
groovy
dne
focal
dne
bionic
ignored
xenial
not-affected
trusty
dne
linux-hwe-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe-5.8
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-hwe-edge
groovy
dne
focal
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-kvm
groovy
not-affected
focal
not-affected
bionic
not-affected
xenial
Fixed 4.4.0-1091.100
released
trusty
dne
linux-lts-trusty
groovy
dne
focal
dne
bionic
dne
xenial
dne
trusty
dne
linux-lts-xenial
groovy
dne
focal
dne
bionic
dne
xenial
dne
trusty
Fixed 4.4.0-208.240~14.04.1
released
linux-oem
groovy
dne
focal
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-oem-5.10
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-oem-5.6
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-oem-osp1
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-oracle
groovy
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
linux-oracle-5.0
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-oracle-5.3
groovy
dne
focal
dne
bionic
ignored
xenial
dne
trusty
dne
linux-oracle-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi
groovy
not-affected
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-raspi-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi2
groovy
dne
focal
ignored
bionic
not-affected
xenial
Fixed 4.4.0-1150.161
released
trusty
dne
linux-raspi2-5.3
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-riscv
groovy
not-affected
focal
ignored
bionic
dne
xenial
dne
trusty
dne
linux-snapdragon
groovy
dne
focal
dne
bionic
Fixed 4.15.0-1053.57
released
xenial
Fixed 4.4.0-1154.164
released
trusty
dne
Common Weakness Enumeration
References
https://bugzilla.redhat.com/show_bug.cgi?id=1932150
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0c80efe5956ccce9fe7ae5c78542578c07bc20a
https://bugzilla.redhat.com/show_bug.cgi?id=1932150
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0c80efe5956ccce9fe7ae5c78542578c07bc20a