CVE-2018-20836

HIGH

Description

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.

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html

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://lists.debian.org/debian-lts-announce/2019/08/msg00016.html

https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html

https://seclists.org/bugtraq/2019/Aug/13

https://seclists.org/bugtraq/2019/Aug/18

https://security.netapp.com/advisory/ntap-20190719-0003/

https://support.f5.com/csp/article/K11225249

https://usn.ubuntu.com/4076-1/

https://www.debian.org/security/2019/dsa-4495

https://www.debian.org/security/2019/dsa-4497

Details

Source: MITRE

Published: 2019-05-07

Updated: 2019-05-08

Type: CWE-362

Risk Information

CVSS v2.0

Base Score: 9.3

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 8.6

Severity: HIGH

CVSS v3.0

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 2.2

Severity: HIGH

Tenable Plugins

View all (33 total)

ID	Name	Product	Family	Severity
141727	Scientific Linux Security Update : kernel on SL7.x x86_64 (20201001)	Nessus	Scientific Linux Local Security Checks	high
141619	CentOS 7 : kernel (CESA-2020:4060)	Nessus	CentOS Local Security Checks	high
141057	RHEL 7 : kernel (RHSA-2020:4060)	Nessus	Red Hat Local Security Checks	high
141026	RHEL 7 : kernel-rt (RHSA-2020:4062)	Nessus	Red Hat Local Security Checks	high
136166	SUSE SLES12 Security Update : kernel (SUSE-SU-2020:1142-1)	Nessus	SuSE Local Security Checks	high
136025	SUSE SLES12 Security Update : kernel (SUSE-SU-2020:1118-1)	Nessus	SuSE Local Security Checks	high
134387	EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-1186)	Nessus	Huawei Local Security Checks	critical
132499	NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0266)	Nessus	NewStart CGSL Local Security Checks	high
132490	NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0264)	Nessus	NewStart CGSL Local Security Checks	high
129284	SUSE SLED15 / SLES15 Security Update : kernel-source-rt (SUSE-SU-2019:2430-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) (SACK Panic) (SACK Slowness) (Spectre)	Nessus	SuSE Local Security Checks	high
127921	Debian DLA-1885-1 : linux-4.9 security update	Nessus	Debian Local Security Checks	high
127867	Debian DSA-4497-1 : linux - security update	Nessus	Debian Local Security Checks	high
127866	Debian DLA-1884-1 : linux security update	Nessus	Debian Local Security Checks	high
127491	Debian DSA-4495-1 : linux - security update	Nessus	Debian Local Security Checks	high
127097	Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4076-1)	Nessus	Ubuntu Local Security Checks	high
126897	openSUSE Security Update : the Linux Kernel (openSUSE-2019-1757)	Nessus	SuSE Local Security Checks	high
126884	openSUSE Security Update : the Linux Kernel (openSUSE-2019-1716)	Nessus	SuSE Local Security Checks	high
126811	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1870-1) (SACK Slowness)	Nessus	SuSE Local Security Checks	high
126744	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:1855-1) (SACK Slowness)	Nessus	SuSE Local Security Checks	high
126743	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:1854-1)	Nessus	SuSE Local Security Checks	high
126742	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1852-1)	Nessus	SuSE Local Security Checks	high
126741	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:1851-1) (SACK Slowness)	Nessus	SuSE Local Security Checks	high
126691	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:1829-1)	Nessus	SuSE Local Security Checks	high
126688	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1823-1)	Nessus	SuSE Local Security Checks	high
126299	EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-1672)	Nessus	Huawei Local Security Checks	high
126266	EulerOS 2.0 SP2 : kernel (EulerOS-SA-2019-1639)	Nessus	Huawei Local Security Checks	high
126121	Photon OS 1.0: Linux PHSA-2019-1.0-0236	Nessus	PhotonOS Local Security Checks	high
126031	Slackware 14.2 / current : kernel (SSA:2019-169-01) (SACK Panic) (SACK Slowness)	Nessus	Slackware Local Security Checks	high
125964	Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2019-4685) (SACK Panic) (SACK Slowness)	Nessus	Oracle Linux Local Security Checks	high
125755	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2019-4670)	Nessus	Oracle Linux Local Security Checks	high
125754	OracleVM 3.4 : Unbreakable / etc (OVMSA-2019-0024)	Nessus	OracleVM Local Security Checks	high
125587	EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2019-1635)	Nessus	Huawei Local Security Checks	high
125564	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1612)	Nessus	Huawei Local Security Checks	high