CVE-2018-18397

EUVD-2018-10126
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 20%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
𝑥
< 4.19.7
redhatopenshift_container_platform
3.11
redhatvirtualization_host
4.0
redhatenterprise_linux_desktop
7.0
redhatenterprise_linux_server
7.0
redhatenterprise_linux_server_aus
7.4
redhatenterprise_linux_server_aus
7.6
redhatenterprise_linux_server_eus
7.4
redhatenterprise_linux_server_eus
7.5
redhatenterprise_linux_server_eus
7.6
redhatenterprise_linux_server_tus
7.4
redhatenterprise_linux_server_tus
7.6
redhatenterprise_linux_workstation
7.0
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
18.10
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.226-1
fixed
jessie
not-affected
sid
6.11.5-1
fixed
stretch
not-affected
trixie
6.11.5-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
bionic
Fixed 4.15.0-46.49
released
cosmic
Fixed 4.18.0-16.17
released
trusty
not-affected
xenial
not-affected
linux-aws
bionic
Fixed 4.15.0-1033.35
released
cosmic
Fixed 4.18.0-1011.13
released
trusty
not-affected
xenial
not-affected
linux-aws-hwe
bionic
dne
cosmic
dne
trusty
dne
xenial
Fixed 4.15.0-1033.35~16.04.1
released
linux-azure
bionic
Fixed 4.18.0-1013.13~18.04.1
released
cosmic
Fixed 4.18.0-1013.13
released
trusty
Fixed 4.15.0-1040.44~14.04.1
released
xenial
Fixed 4.15.0-1040.44
released
linux-azure-edge
bionic
Fixed 4.18.0-1013.13~18.04.1
released
cosmic
dne
trusty
dne
xenial
Fixed 4.15.0-1040.44
released
linux-euclid
bionic
dne
cosmic
dne
trusty
dne
xenial
ignored
linux-flo
bionic
dne
cosmic
dne
trusty
dne
xenial
ignored
linux-gcp
bionic
Fixed 4.15.0-1028.29
released
cosmic
Fixed 4.18.0-1007.8
released
trusty
dne
xenial
Fixed 4.15.0-1028.29~16.04.1
released
linux-gcp-edge
bionic
Fixed 4.18.0-1007.8~18.04.1
released
cosmic
dne
trusty
dne
xenial
dne
linux-gke
bionic
dne
cosmic
dne
trusty
dne
xenial
ignored
linux-goldfish
bionic
dne
cosmic
dne
trusty
dne
xenial
ignored
linux-grouper
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-hwe
bionic
Fixed 4.18.0-16.17~18.04.1
released
cosmic
dne
trusty
dne
xenial
Fixed 4.15.0-46.49~16.04.1
released
linux-hwe-edge
bionic
not-affected
cosmic
dne
trusty
dne
xenial
Fixed 4.15.0-46.49~16.04.1
released
linux-kvm
bionic
Fixed 4.15.0-1030.30
released
cosmic
Fixed 4.18.0-1008.8
released
trusty
dne
xenial
not-affected
linux-lts-trusty
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-lts-utopic
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-lts-vivid
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-lts-wily
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-lts-xenial
bionic
dne
cosmic
dne
trusty
not-affected
xenial
dne
linux-maguro
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-mako
bionic
dne
cosmic
dne
trusty
dne
xenial
ignored
linux-manta
bionic
dne
cosmic
dne
trusty
dne
xenial
dne
linux-oem
bionic
Fixed 4.15.0-1034.39
released
cosmic
Fixed 4.15.0-1034.39
released
trusty
dne
xenial
ignored
linux-oracle
bionic
Fixed 4.15.0-1009.11
released
cosmic
not-affected
trusty
dne
xenial
Fixed 4.15.0-1009.11~16.04.1
released
linux-raspi2
bionic
Fixed 4.15.0-1032.34
released
cosmic
Fixed 4.18.0-1010.12
released
trusty
dne
xenial
not-affected
linux-snapdragon
bionic
not-affected
cosmic
dne
trusty
dne
xenial
not-affected
Common Weakness Enumeration
References
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1
https://access.redhat.com/errata/RHBA-2019:0327
https://access.redhat.com/errata/RHSA-2019:0163
https://access.redhat.com/errata/RHSA-2019:0202
https://access.redhat.com/errata/RHSA-2019:0324
https://access.redhat.com/errata/RHSA-2019:0831
https://bugs.chromium.org/p/project-zero/issues/detail?id=1700
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7
https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1
https://usn.ubuntu.com/3901-1/
https://usn.ubuntu.com/3901-2/
https://usn.ubuntu.com/3903-1/
https://usn.ubuntu.com/3903-2/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1
https://access.redhat.com/errata/RHBA-2019:0327
https://access.redhat.com/errata/RHSA-2019:0163
https://access.redhat.com/errata/RHSA-2019:0202
https://access.redhat.com/errata/RHSA-2019:0324
https://access.redhat.com/errata/RHSA-2019:0831
https://bugs.chromium.org/p/project-zero/issues/detail?id=1700
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7
https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1
https://usn.ubuntu.com/3901-1/
https://usn.ubuntu.com/3901-2/
https://usn.ubuntu.com/3903-1/
https://usn.ubuntu.com/3903-2/