CVE-2018-20836: Race Condition
First published: Tue Sep 25 2018(Updated: )
An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.rt56.1131.el7 | 0:3.10.0-1160.rt56.1131.el7 |
| redhat/kernel | <0:3.10.0-1160.el7 | 0:3.10.0-1160.el7 |
| redhat/kernel | <0:3.10.0-957.65.1.el7 | 0:3.10.0-957.65.1.el7 |
| redhat/kernel | <0:3.10.0-1062.43.1.el7 | 0:3.10.0-1062.43.1.el7 |
| ubuntu/linux | <4.15.0-44.47 | 4.15.0-44.47 |
| ubuntu/linux | <4.18.0-14.15 | 4.18.0-14.15 |
| ubuntu/linux | <4.20~ | 4.20~ |
| ubuntu/linux | <4.4.0-157.185 | 4.4.0-157.185 |
| ubuntu/linux-aws | <4.15.0-1032.34 | 4.15.0-1032.34 |
| ubuntu/linux-aws | <4.18.0-1008.10 | 4.18.0-1008.10 |
| ubuntu/linux-aws | <4.20~ | 4.20~ |
| ubuntu/linux-aws | <4.4.0-1090.101 | 4.4.0-1090.101 |
| ubuntu/linux-aws-hwe | <4.20~ | 4.20~ |
| ubuntu/linux-aws-hwe | <4.15.0-1032.34~16.04.1 | 4.15.0-1032.34~16.04.1 |
| ubuntu/linux-azure | <4.15.0-1037.39 | 4.15.0-1037.39 |
| ubuntu/linux-azure | <4.18.0-1008.8 | 4.18.0-1008.8 |
| ubuntu/linux-azure | <4.20~ | 4.20~ |
| ubuntu/linux-azure | <4.15.0-1037.39~16.04.1 | 4.15.0-1037.39~16.04.1 |
| ubuntu/linux-azure-edge | <4.15.0-1037.39 | 4.15.0-1037.39 |
| ubuntu/linux-azure-edge | <4.20~ | 4.20~ |
| ubuntu/linux-azure-edge | <4.15.0-1037.39~16.04.1 | 4.15.0-1037.39~16.04.1 |
| ubuntu/linux-euclid | <4.20~ | 4.20~ |
| ubuntu/linux-flo | <4.20~ | 4.20~ |
| ubuntu/linux-gcp | <4.15.0-1027.28 | 4.15.0-1027.28 |
| ubuntu/linux-gcp | <4.18.0-1006.7 | 4.18.0-1006.7 |
| ubuntu/linux-gcp | <4.20~ | 4.20~ |
| ubuntu/linux-gcp | <4.15.0-1027.28~16.04.1 | 4.15.0-1027.28~16.04.1 |
| ubuntu/linux-gcp-edge | <4.18.0-1006.7~18.04.1 | 4.18.0-1006.7~18.04.1 |
| ubuntu/linux-gcp-edge | <4.20~ | 4.20~ |
| ubuntu/linux-gke | <4.20~ | 4.20~ |
| ubuntu/linux-gke-4.15 | <4.20~ | 4.20~ |
| ubuntu/linux-gke-5.0 | <4.20~ | 4.20~ |
| ubuntu/linux-goldfish | <4.20~ | 4.20~ |
| ubuntu/linux-grouper | <4.20~ | 4.20~ |
| ubuntu/linux-hwe | <4.18.0-14.15~18.04.1 | 4.18.0-14.15~18.04.1 |
| ubuntu/linux-hwe | <4.20~ | 4.20~ |
| ubuntu/linux-hwe | <4.15.0-45.48~16.04.1 | 4.15.0-45.48~16.04.1 |
| ubuntu/linux-hwe-edge | <4.20~ | 4.20~ |
| ubuntu/linux-hwe-edge | <4.15.0-45.48~16.04.1 | 4.15.0-45.48~16.04.1 |
| ubuntu/linux-kvm | <4.15.0-1029.29 | 4.15.0-1029.29 |
| ubuntu/linux-kvm | <4.18.0-1007.7 | 4.18.0-1007.7 |
| ubuntu/linux-kvm | <4.20~ | 4.20~ |
| ubuntu/linux-kvm | <4.4.0-1052.59 | 4.4.0-1052.59 |
| ubuntu/linux-lts-trusty | <4.20~ | 4.20~ |
| ubuntu/linux-lts-utopic | <4.20~ | 4.20~ |
| ubuntu/linux-lts-vivid | <4.20~ | 4.20~ |
| ubuntu/linux-lts-wily | <4.20~ | 4.20~ |
| ubuntu/linux-lts-xenial | <4.20~ | 4.20~ |
| ubuntu/linux-maguro | <4.20~ | 4.20~ |
| ubuntu/linux-mako | <4.20~ | 4.20~ |
| ubuntu/linux-manta | <4.20~ | 4.20~ |
| ubuntu/linux-oem | <4.15.0-1033.38 | 4.15.0-1033.38 |
| ubuntu/linux-oem | <4.15.0-1033.38 | 4.15.0-1033.38 |
| ubuntu/linux-oem | <4.20~ | 4.20~ |
| ubuntu/linux-oracle | <4.15.0-1008.10 | 4.15.0-1008.10 |
| ubuntu/linux-oracle | <4.15.0-1008.10 | 4.15.0-1008.10 |
| ubuntu/linux-oracle | <4.20~ | 4.20~ |
| ubuntu/linux-oracle | <4.15.0-1008.10~16.04.1 | 4.15.0-1008.10~16.04.1 |
| ubuntu/linux-raspi2 | <4.15.0-1031.33 | 4.15.0-1031.33 |
| ubuntu/linux-raspi2 | <4.18.0-1009.11 | 4.18.0-1009.11 |
| ubuntu/linux-raspi2 | <4.20~ | 4.20~ |
| ubuntu/linux-raspi2 | <4.4.0-1117.126 | 4.4.0-1117.126 |
| ubuntu/linux-snapdragon | <4.15.0-1053.57 | 4.15.0-1053.57 |
| ubuntu/linux-snapdragon | <4.20~ | 4.20~ |
| ubuntu/linux-snapdragon | <4.4.0-1121.127 | 4.4.0-1121.127 |
| Linux Linux kernel | <3.16.72 | |
| Linux Linux kernel | >=3.17<3.18.140 | |
| Linux Linux kernel | >=3.19<4.4.180 | |
| Linux Linux kernel | >=4.5<4.9.175 | |
| Linux Linux kernel | >=4.10<4.14.118 | |
| Linux Linux kernel | >=4.15<4.19.42 | |
| Canonical Ubuntu Linux | =16.04 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| F5 Traffix Signaling Delivery Controller | =5.0.0 | |
| F5 Traffix Signaling Delivery Controller | =5.1.0 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | >=9.5 | |
| Netapp Snapprotect | ||
| Netapp Solidfire \& Hci Management Node | ||
| Netapp Solidfire \& Hci Storage Node | ||
| Netapp Storage Replication Adapter For Clustered Data Ontap Vmware Vsphere | ||
| Netapp Vasa Provider For Clustered Data Ontap | >=7.2 | |
| Netapp Virtual Storage Console Vmware Vsphere | >=7.2 | |
| Netapp Hci Compute Node | ||
| openSUSE Leap | =15.0 | |
| openSUSE Leap | =15.1 | |
| debian/linux | 5.10.218-1 6.1.94-1 6.1.90-1 6.8.12-1 6.9.7-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2018-20836 https://nvd.nist.gov/vuln/detail/CVE-2018-20836
- https://bugzilla.redhat.com/show_bug.cgi?id=1707796
- https://access.redhat.com/errata/RHSA-2020:4062
- https://access.redhat.com/errata/RHSA-2020:4060
- https://access.redhat.com/errata/RHSA-2020:5656
- https://access.redhat.com/errata/RHSA-2021:0019
- https://access.redhat.com/security/cve/cve-2018-20836
- http://www.securityfocus.com/bid/108196
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae
- https://support.f5.com/csp/article/K11225249
- https://security.netapp.com/advisory/ntap-20190719-0003/
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
- https://usn.ubuntu.com/4076-1/
- https://www.debian.org/security/2019/dsa-4495
- https://seclists.org/bugtraq/2019/Aug/13
- https://seclists.org/bugtraq/2019/Aug/18
- https://www.debian.org/security/2019/dsa-4497
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html
- https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html
- https://launchpad.net/bugs/cve/CVE-2018-20836
- https://git.kernel.org/linus/b90cd6f2b905905fb42671009dc0e27c310a16ae
- https://security-tracker.debian.org/tracker/CVE-2018-20836
- https://ubuntu.com/security/notices/USN-4076-1
- https://www.cve.org/CVERecord?id=CVE-2018-20836
- https://nvd.nist.gov/vuln/detail/CVE-2018-20836
- https://git.kernel.org/linus/2908d778ab3e244900c310974e1fc1c69066e450
- https://ubuntu.com/security/CVE-2018-20836
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- agent/description
- agent/weakness
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2018-20836
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- agent/software-canonical-lookup
- agent/references
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/tags
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/redhat
- package-manager/ubuntu
- package-manager/debian
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/3.17
- version/linux linux kernel/3.19
- version/linux linux kernel/4.5
- version/linux linux kernel/4.10
- version/linux linux kernel/4.15
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/16.04
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/f5
- canonical/f5 traffix signaling delivery controller
- version/f5 traffix signaling delivery controller/5.0.0
- version/f5 traffix signaling delivery controller/5.1.0
- vendor/netapp
- canonical/netapp active iq unified manager vmware vsphere
- version/netapp active iq unified manager vmware vsphere/9.5
- canonical/netapp snapprotect
- canonical/netapp solidfire \& hci management node
- canonical/netapp solidfire \& hci storage node
- canonical/netapp storage replication adapter for clustered data ontap vmware vsphere
- canonical/netapp vasa provider for clustered data ontap
- version/netapp vasa provider for clustered data ontap/7.2
- canonical/netapp virtual storage console vmware vsphere
- version/netapp virtual storage console vmware vsphere/7.2
- canonical/netapp hci compute node
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.0
- version/opensuse leap/15.1