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CVE-2019-19965

Published: 25 December 2019

In the Linux kernel through 5.4.6, there is a NULL pointer dereference in drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery, related to a PHY down race condition, aka CID-f70267f379b5.

From the Ubuntu security team

Gao Chuan discovered that the SAS Class driver in the Linux kernel contained a race condition that could lead to a NULL pointer dereference. A local attacker could possibly use this to cause a denial of service (system crash).

Priority

Medium

CVSS 3 base score: 4.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-18.22)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-88.88)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-174.204)
Ubuntu 14.04 ESM (Trusty Tahr) Ignored
(was needed ESM criteria)
Patches:
Introduced by 2908d778ab3e244900c310974e1fc1c69066e450
Fixed by f70267f379b5e5e11bdc5d72a56bf17e5feed01f
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1005.5)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1060.62)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1102.113)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.4.0-1062.66)
linux-aws-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1025.28)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1016.17~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1060.62~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1006.6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1032.34)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1071.76)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.15.0-1071.76~14.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1082.92)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.3.0-1013.14~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~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 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1005.5)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1031.32)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1055.59)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp-4.15
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1071.81)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.3.0-1012.13~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~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 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1052.55)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1030.31)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.3.0-1012.13~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.3.0-40.32~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-88.88~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~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 ESM (Xenial Xerus) Ignored
(was needs-triage now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1004.4)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1053.53)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1066.73)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.4.0-174.204~14.04.1)
linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1073.83)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(was needs-triage now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oem-5.6
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.6.0-1007.7)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1039.44)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1005.5)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1033.36)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1033.36~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oracle-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1011.16)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~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 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-1007.7)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Ignored
(was needed now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1055.59)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1129.138)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.3.0-1018.20~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(5.4.0-24.28)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (5.5~rc2)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1072.79)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.4.0-1133.141)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist