CVE-2019-15791

Published: 12 November 2019

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.

From the Ubuntu security team

Jann Horn discovered a reference count underflow in the shiftfs implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Medium

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-9.12)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.13.0-16.19)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.2.0-16.19)
Ubuntu 14.04 ESM (Trusty Tahr) Ignored
(was needs-triage ESM criteria)
Ubuntu 12.04 ESM (Precise Pangolin) Ignored
(was needs-triage ESM criteria)
Patches:
Introduced by local-2019-15791-break
Fixed by local-2019-15791-fix
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1005.5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1001.1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.4.0-1001.10)
Ubuntu 14.04 ESM (Trusty Tahr) Ignored
(was needs-triage ESM criteria)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-aws-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1021.24~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.15.0-1030.31~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1006.6)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1002.2)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.11.0-1009.9)
Ubuntu 14.04 ESM (Trusty Tahr) Ignored
(was needs-triage ESM criteria)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1007.8~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Ignored
(was needs-triage now end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus) Ignored
(was needs-triage now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1005.5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1001.1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.10.0-1004.4)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1008.9~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Ignored
(was needs-triage now end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1030.32)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1011.11~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1011.12~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.18.0-13.14~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.8.0-36.36~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Ignored
(was pending \[5.3.0-22.24~18.04.1\] now end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus) Ignored
(was needs-triage now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1004.4)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1002.2)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.4.0-1004.9)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Ignored
(was needs-triage ESM criteria)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Ignored
(was needs-triage ESM criteria)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1002.3)
Ubuntu 16.04 LTS (Xenial Xerus) Ignored
(was needs-triage now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-oem-5.4
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1002.4)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1010.11)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1005.5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1007.9)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.15.0-1007.9~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-oracle-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1007.12~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Ignored
(was needed now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.13.0-1005.5)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.2.0-1013.19)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1017.19~18.04.1)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (2.6.12~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.4.0-1077.82)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(4.4.0-1012.12)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist