CVE-2019-6974

MEDIUM

Description

In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9

http://www.securityfocus.com/bid/107127

https://access.redhat.com/errata/RHBA-2019:0959

https://access.redhat.com/errata/RHSA-2019:0818

https://access.redhat.com/errata/RHSA-2019:0833

https://access.redhat.com/errata/RHSA-2019:2809

https://access.redhat.com/errata/RHSA-2019:3967

https://access.redhat.com/errata/RHSA-2020:0103

https://bugs.chromium.org/p/project-zero/issues/detail?id=1765

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156

https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9

https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html

https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html

https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html

https://support.f5.com/csp/article/K11186236

https://support.f5.com/csp/article/K11186236?utm_source=f5support&utm_medium=RSS

https://usn.ubuntu.com/3930-1/

https://usn.ubuntu.com/3930-2/

https://usn.ubuntu.com/3931-1/

https://usn.ubuntu.com/3931-2/

https://usn.ubuntu.com/3932-1/

https://usn.ubuntu.com/3932-2/

https://usn.ubuntu.com/3933-1/

https://usn.ubuntu.com/3933-2/

https://www.exploit-db.com/exploits/46388/

Details

Source: MITRE

Published: 2019-02-15

Updated: 2020-10-15

Type: CWE-362

Risk Information

CVSS v2.0

Base Score: 6.8

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

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

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

Vulnerable Software

Tenable Plugins

View all (50 total)

ID	Name	Product	Family	Severity
141374	OracleVM 3.4 : Unbreakable / etc (OVMSA-2020-0044)	Nessus	OracleVM Local Security Checks	critical
141207	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5866)	Nessus	Oracle Linux Local Security Checks	critical
133455	Virtuozzo 7 : readykernel-patch (VZA-2019-046)	Nessus	Virtuozzo Local Security Checks	medium
133454	Virtuozzo 7 : readykernel-patch (VZA-2019-045)	Nessus	Virtuozzo Local Security Checks	medium
133453	Virtuozzo 7 : readykernel-patch (VZA-2019-042)	Nessus	Virtuozzo Local Security Checks	medium
132886	RHEL 7 : kernel (RHSA-2020:0103)	Nessus	Red Hat Local Security Checks	medium
132554	F5 Networks BIG-IP : Linux kernel KVM subsystem vulnerability (K11186236)	Nessus	F5 Networks Local Security Checks	medium
131375	RHEL 7 : kernel (RHSA-2019:3967)	Nessus	Red Hat Local Security Checks	high
129145	RHEL 7 : kernel-alt (RHSA-2019:2809)	Nessus	Red Hat Local Security Checks	high
127302	NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0086)	Nessus	NewStart CGSL Local Security Checks	medium
127301	NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0085)	Nessus	NewStart CGSL Local Security Checks	medium
127285	NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0077)	Nessus	NewStart CGSL Local Security Checks	high
127283	NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0076)	Nessus	NewStart CGSL Local Security Checks	high
126031	Slackware 14.2 / current : kernel (SSA:2019-169-01) (SACK Panic) (SACK Slowness)	Nessus	Slackware Local Security Checks	high
125283	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1289-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)	Nessus	SuSE Local Security Checks	high
124984	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1531)	Nessus	Huawei Local Security Checks	high
124953	EulerOS Virtualization 3.0.1.0 : kvm (EulerOS-SA-2019-1450)	Nessus	Huawei Local Security Checks	medium
124750	EulerOS Virtualization 2.5.4 : kvm (EulerOS-SA-2019-1372)	Nessus	Huawei Local Security Checks	medium
124595	Debian DLA-1771-1 : linux-4.9 security update	Nessus	Debian Local Security Checks	high
124416	CentOS 7 : kernel (CESA-2019:0818)	Nessus	CentOS Local Security Checks	medium
124290	Scientific Linux Security Update : kernel on SL7.x x86_64 (20190423)	Nessus	Scientific Linux Local Security Checks	medium
124259	RHEL 7 : kernel-rt (RHSA-2019:0833)	Nessus	Red Hat Local Security Checks	medium
124256	RHEL 7 : kernel (RHSA-2019:0818)	Nessus	Red Hat Local Security Checks	medium
124254	Oracle Linux 7 : kernel (ELSA-2019-0818)	Nessus	Oracle Linux Local Security Checks	medium
124048	Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2019-4612)	Nessus	Oracle Linux Local Security Checks	high
123927	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0901-1)	Nessus	SuSE Local Security Checks	high
123723	EulerOS Virtualization 2.5.3 : kvm (EulerOS-SA-2019-1255)	Nessus	Huawei Local Security Checks	medium
123682	Ubuntu 14.04 LTS : linux vulnerabilities (USN-3933-1)	Nessus	Ubuntu Local Security Checks	medium
123681	Ubuntu 14.04 LTS : linux-lts-xenial, linux-aws vulnerabilities (USN-3932-2)	Nessus	Ubuntu Local Security Checks	high
123680	Ubuntu 16.04 LTS : linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities (USN-3932-1)	Nessus	Ubuntu Local Security Checks	high
123679	Ubuntu 14.04 LTS / 16.04 LTS : linux-hwe, linux-aws-hwe, linux-azure, linux-gcp, linux-oracle (USN-3931-2)	Nessus	Ubuntu Local Security Checks	high
123678	Ubuntu 18.04 LTS : linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, (USN-3931-1)	Nessus	Ubuntu Local Security Checks	high
123677	Ubuntu 18.04 LTS : linux-hwe, linux-azure vulnerabilities (USN-3930-2)	Nessus	Ubuntu Local Security Checks	high
123676	Ubuntu 18.10 : linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2 (USN-3930-1)	Nessus	Ubuntu Local Security Checks	high
123635	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0828-1)	Nessus	SuSE Local Security Checks	high
123496	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:0784-1)	Nessus	SuSE Local Security Checks	high
123445	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0767-1)	Nessus	SuSE Local Security Checks	high
123420	Debian DLA-1731-2 : linux regression update (Spectre)	Nessus	Debian Local Security Checks	high
123413	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:0765-1) (Spectre)	Nessus	SuSE Local Security Checks	high
123125	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0722-1)	Nessus	SuSE Local Security Checks	medium
123066	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0709-1)	Nessus	SuSE Local Security Checks	medium
123061	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0683-1)	Nessus	SuSE Local Security Checks	medium
123000	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0672-1)	Nessus	SuSE Local Security Checks	medium
122699	EulerOS 2.0 SP5 : kernel (EulerOS-SA-2019-1076)	Nessus	Huawei Local Security Checks	medium
122671	Amazon Linux 2 : kernel (ALAS-2019-1165)	Nessus	Amazon Linux Local Security Checks	medium
122609	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:0541-1)	Nessus	SuSE Local Security Checks	high
122602	Amazon Linux AMI : kernel (ALAS-2019-1165)	Nessus	Amazon Linux Local Security Checks	medium
122303	openSUSE Security Update : the Linux Kernel (openSUSE-2019-203)	Nessus	SuSE Local Security Checks	high
122278	Fedora 28 : kernel / kernel-headers / kernel-tools (2019-3da64f3e61)	Nessus	Fedora Local Security Checks	medium
122275	Fedora 29 : kernel / kernel-headers / kernel-tools (2019-164946aa7f)	Nessus	Fedora Local Security Checks	medium