CVE-2019-15791

EUVD-2019-6714
In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() installs an fd referencing a file from the lower filesystem without taking an additional reference to that file. After the btrfs ioctl completes this fd is closed, which then puts a reference to that file, leading to a refcount underflow.
Wrap or Wraparound
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.1 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
canonicalCNA
7.1 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 32%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
5.0
linuxlinux_kernel
5.3
canonicalubuntu_linux
18.04
canonicalubuntu_linux
19.04
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
sid
6.11.6-1
fixed
trixie
6.11.5-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-22.24
released
trusty
ignored
xenial
not-affected
linux-aws
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-1007.8
released
trusty
ignored
xenial
not-affected
linux-aws-5.0
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-aws-hwe
bionic
dne
disco
dne
eoan
dne
trusty
dne
xenial
not-affected
linux-azure
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-1007.8
released
trusty
ignored
xenial
not-affected
linux-azure-5.3
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-azure-edge
bionic
ignored
disco
dne
eoan
dne
trusty
dne
xenial
ignored
linux-gcp
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-1008.9
released
trusty
dne
xenial
not-affected
linux-gcp-5.3
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-gcp-edge
bionic
ignored
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-gke-4.15
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-gke-5.0
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-gke-5.3
bionic
not-affected
eoan
dne
trusty
dne
xenial
dne
linux-hwe
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
not-affected
linux-hwe-edge
bionic
ignored
disco
dne
eoan
dne
trusty
dne
xenial
ignored
linux-kvm
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-1007.8
released
trusty
dne
xenial
not-affected
linux-lts-trusty
bionic
dne
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-lts-xenial
bionic
dne
disco
dne
eoan
dne
trusty
ignored
xenial
dne
linux-oem
bionic
not-affected
disco
not-affected
eoan
not-affected
trusty
dne
xenial
ignored
linux-oem-5.4
bionic
dne
eoan
dne
trusty
dne
xenial
dne
linux-oem-osp1
bionic
not-affected
disco
not-affected
eoan
not-affected
trusty
dne
xenial
dne
linux-oracle
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-1006.7
released
trusty
dne
xenial
not-affected
linux-oracle-5.0
bionic
not-affected
disco
dne
eoan
dne
trusty
dne
xenial
dne
linux-raspi2
bionic
not-affected
disco
not-affected
eoan
Fixed 5.3.0-1012.14
released
trusty
dne
xenial
not-affected
linux-raspi2-5.3
bionic
not-affected
eoan
dne
trusty
dne
xenial
dne
linux-snapdragon
bionic
not-affected
disco
not-affected
eoan
dne
trusty
dne
xenial
not-affected
Common Weakness Enumeration
References
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=601a64857b3d7040ca15c39c929e6b9db3373ec1
https://usn.ubuntu.com/usn/usn-4183-1
https://usn.ubuntu.com/usn/usn-4184-1
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=601a64857b3d7040ca15c39c929e6b9db3373ec1
https://usn.ubuntu.com/usn/usn-4183-1
https://usn.ubuntu.com/usn/usn-4184-1