CVE-2020-15436
Published: 23 November 2020
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
From the Ubuntu security team
It was discovered that the block layer implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash).
Priority
Medium
CVSS 3 base score: 6.7
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-45.49)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-115.116)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.4.0-187.217)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Ignored
(was needs-triage ESM criteria)
|
|
|
Patches: Introduced by 77ea887e433ad8389d416826936c110fa7910f80 Fixed by 2d3a8e2deddea6c89961c422ec0c5b851e648c14 |
||
|
linux-aws Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-1022.22)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1080.84)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.4.0-1112.124)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Ignored
(was needs-triage ESM criteria)
|
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-aws-5.3)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-aws-5.4)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.4.0-1022.22~18.04.1)
|
|
| 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
(5.8~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
(4.15.0-1080.84~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-1023.23)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-azure-5.3)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.15.0-1093.103~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Ignored
(was needs-triage ESM criteria)
|
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1093.103)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-azure-5.4)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.4.0-1023.23~18.04.1)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-azure-5.3)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-dell300x Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.15.0-1005.8)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-1022.22)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-gcp-5.3)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.15.0-1081.92~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1081.92)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-gcp-5.4)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.4.0-1022.22~18.04.1)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-gcp-5.3)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1067.70)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.0.0-1046.47)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.3.0-1033.35)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gke-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(5.4.0-1025.25~18.04.1)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gkeop Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(5.4.0-1008.9)
|
|
| 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-gkeop-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(5.4.0-1001.1)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(replaced by linux-hwe-5.4)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.15.0-115.116~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.4.0-45.49~18.04.2)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-hwe-5.8 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(5.8.0-23.24~20.04.1)
|
|
| 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-hwe-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-hwe-5.4)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Ignored
(superseded by linux-hwe)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-1021.21)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1072.73)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.4.0-1078.85)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~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
(5.8~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) |
Ignored
(was needs-triage ESM criteria)
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1094.104)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Ignored
(superseded by linux-hwe)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-oem-5.10 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(5.10.0-1008.9)
|
|
| 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-5.6 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.6.0-1048.52)
|
|
| 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
(5.8~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-oracle Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-1022.22)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1051.55)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.15.0-1051.55~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-oracle-5.3)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Ignored
(superseded by linux-oracle-5.4)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.4.0-1022.22~18.04.1)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-1016.17)
|
|
| 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-raspi-5.4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.4.0-1016.17~18.04.1)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Ignored
(replaced by linux-raspi)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1068.72)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.4.0-1137.146)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(5.3.0-1032.34)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(5.4.0-31.35)
|
|
| 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
(5.8~rc2)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1084.92)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(4.4.0-1141.149)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|