RHSA-2019:4154
Vulnerability from csaf_redhat - Published: 2019-12-10 12:06 - Updated: 2026-06-30 11:35Summary
Red Hat Security Advisory: kernel-alt security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for kernel-alt 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-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
* kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of service (CVE-2017-18203)
* kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625)
* kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658)
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):
* IPMI use after free issue seen on Marvell ThunderX2 (BZ#1732163)
* kernel: siginfo delivers SEGV_MAPERR instead of SEGV_ACCERR [rhel-alt-7.6.z] (BZ#1757189)
Enhancement(s):
* [Marvell 7.7 z-stream BUG] CN99xx: DIMM label not extracted in EDAC hw error log (BZ#1721427)
Terms of Use: 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.
The Linux kernel, before version 4.14.3, is vulnerable to a denial of service in drivers/md/dm.c:dm_get_from_kobject() which can be caused by local users leveraging a race condition with __dm_destroy() during creation and removal of DM devices. Only privileged local users (with CAP_SYS_ADMIN capability) can directly perform the ioctl operations for dm device creation and removal and this would typically be outside the direct control of the unprivileged attacker.
4.7 (Medium)
Affected products
Fixed
26 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-abi-whitelists-0:4.14.0-115.16.1.el7a.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-alt-0:4.14.0-115.16.1.el7a.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-bootwrapper-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-debug-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-debug-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-debuginfo-common-ppc64le-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-devel-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-doc-0:4.14.0-115.16.1.el7a.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-headers-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-tools-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-tools-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:kernel-tools-libs-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:perf-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:perf-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:python-perf-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHELALT-7.6:python-perf-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:kernel-debug-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:kernel-debug-devel-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:kernel-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:kernel-debuginfo-common-ppc64le-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:kernel-tools-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:kernel-tools-libs-devel-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:perf-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-optional-RHELALT-7.6:python-perf-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
A flaw was found where an attacker may be able to have an uncontrolled read to kernel-memory from within a vm guest. A race condition between connect() and close() function may allow an attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly impersonate AF_VSOCK messages destined to other clients or leak kernel memory.
5.3 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2017-18203
Threats
Impact
Moderate
An information leak was discovered in the Linux kernel in cdrom_ioctl_drive_status() function in drivers/cdrom/cdrom.c that could be used by local attackers to read kernel memory at certain location.
4.0 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2017-18203
Threats
Impact
Low
An out-of-bounds access issue was found in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.
7.0 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2017-18203
Threats
Impact
Important
References
23 references
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"title": "Statement"
},
{
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"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.",
"title": "CVSS score applicability"
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"title": "kernel: Information leak in cdrom_ioctl_drive_status"
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{
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"text": "An out-of-bounds access issue was found in the way Linux kernel\u0027s KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer \u0027struct kvm_coalesced_mmio\u0027 object, wherein write indices \u0027ring-\u003efirst\u0027 and \u0027ring-\u003elast\u0027 value could be supplied by a host user-space process. An unprivileged host user or process with access to \u0027/dev/kvm\u0027 device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "Kernel: KVM: OOB memory access via mmio ring buffer",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue requires unprivileged users to have access to \u0027/dev/kvm\u0027 device. So restricting access to \u0027/dev/kvm\u0027 device to known trusted users could limit its exploitation by untrusted users/processes.",
"title": "Statement"
},
{
"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.",
"title": "CVSS score applicability"
}
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"7Server-optional-RHELALT-7.6:kernel-debug-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:kernel-debug-devel-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:kernel-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:kernel-debuginfo-common-ppc64le-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:kernel-tools-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:kernel-tools-libs-devel-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:perf-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le",
"7Server-optional-RHELALT-7.6:python-perf-debuginfo-0:4.14.0-115.16.1.el7a.ppc64le"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "Kernel: KVM: OOB memory access via mmio ring buffer"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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