csaf_redhat - rhsa-2019

rhsa-2019_0833

Vulnerability from csaf_redhat

Published

2019-04-23 12:58

Modified

2024-09-13 21:58

Summary

Red Hat Security Advisory: kernel-rt security and bug fix update

Notes

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * Kernel: KVM: potential use-after-free via kvm_ioctl_create_device() (CVE-2019-6974) * Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer (CVE-2019-7221) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * VM hangs on RHEL rt-kernel and OSP 13 [rhel-7.6.z] (BZ#1688673) * kernel-rt: update to the RHEL7.6.z batch#4 source tree (BZ#1689417) Users of kernel are advised to upgrade to these updated packages, which fix these bugs.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

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      "acknowledgments": [
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          "organization": "Google"
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      "cve": "CVE-2019-6974",
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          "category": "description",
          "text": "A use-after-free vulnerability was found in the way the Linux kernel\u0027s KVM hypervisor implements its device control API. While creating a device via kvm_ioctl_create_device(), the device holds a reference to a VM object, later this reference is transferred to the caller\u0027s file descriptor table. If such file descriptor was to be closed, reference count to the VM object could become zero, potentially leading to a use-after-free issue. A user/process could use this flaw to crash the guest VM resulting in a denial of service issue or, potentially, gain privileged access to a system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Kernel: KVM: potential use-after-free via kvm_ioctl_create_device()",
          "title": "Vulnerability summary"
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        {
          "category": "other",
          "text": "This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.\n\nThis issue affects the versions of Linux kernel as shipped with Red Hat Enterprise Linux 7. Future kernel updates for Red Hat Enterprise Linux 7 may address this issue.",
          "title": "Statement"
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        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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cve-2019-6974

Vulnerability from cvelistv5

Published

2019-02-15 15:00

Modified

2024-08-04 20:38

Severity

Summary

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

URL	Tags
https://bugs.chromium.org/p/project-zero/issues/detail?id=1765	x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99	x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21	x_refsource_MISC
https://www.exploit-db.com/exploits/46388/	exploit, x_refsource_EXPLOIT-DB
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8	x_refsource_MISC
https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9	x_refsource_MISC
http://www.securityfocus.com/bid/107127	vdb-entry, x_refsource_BID
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156	x_refsource_MISC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html	mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html	mailing-list, x_refsource_MLIST
https://usn.ubuntu.com/3932-1/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3932-2/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3930-1/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3931-1/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3933-2/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3931-2/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3930-2/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3933-1/	vendor-advisory, x_refsource_UBUNTU
https://support.f5.com/csp/article/K11186236	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:0833	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0818	vendor-advisory, x_refsource_REDHAT
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html	mailing-list, x_refsource_MLIST
https://access.redhat.com/errata/RHBA-2019:0959	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2809	vendor-advisory, x_refsource_REDHAT
https://support.f5.com/csp/article/K11186236?utm_source=f5support&amp%3Butm_medium=RSS	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:3967	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0103	vendor-advisory, x_refsource_REDHAT

Impacted products

Vendor	Product
n/a	n/a

Show details on NVD website

JSON

To clipboard

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cve-2019-7221

Vulnerability from cvelistv5

Published

2019-03-17 18:26

Modified

2024-08-04 20:46

Severity

Summary

The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.

References

URL	Tags
http://packetstormsecurity.com/files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.html	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KDOXCX3QFVWYXH5CQMGDDE7H6MUG5XGG/	vendor-advisory, x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2HMABEMJDPA6LPCBE5WIEZXUKY7DLTN/	vendor-advisory, x_refsource_FEDORA
https://github.com/torvalds/linux/commits/master/arch/x86/kvm	x_refsource_MISC
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html	vendor-advisory, x_refsource_SUSE
http://www.openwall.com/lists/oss-security/2019/02/18/2	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ecec76885bcfe3294685dc363fd1273df0d5d65f	x_refsource_CONFIRM
https://bugs.chromium.org/p/project-zero/issues/detail?id=1760	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html	mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html	mailing-list, x_refsource_MLIST
https://usn.ubuntu.com/3932-1/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3932-2/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3930-1/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3931-1/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3931-2/	vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/3930-2/	vendor-advisory, x_refsource_UBUNTU
https://security.netapp.com/advisory/ntap-20190404-0002/	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:0833	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0818	vendor-advisory, x_refsource_REDHAT
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html	mailing-list, x_refsource_MLIST
https://access.redhat.com/errata/RHBA-2019:0959	vendor-advisory, x_refsource_REDHAT
https://support.f5.com/csp/article/K08413011	x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:3967	vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4058	vendor-advisory, x_refsource_REDHAT

Impacted products

Vendor	Product
n/a	n/a

Show details on NVD website

JSON

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Action not permitted

rhsa-2019_0833

Vulnerability from csaf_redhat

cve-2019-6974

Vulnerability from cvelistv5

cve-2019-7221

Vulnerability from cvelistv5

Tags