rhsa-2021_2169
Vulnerability from csaf_redhat
Published
2021-06-01 09:46
Modified
2024-11-15 11:49
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 8.
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: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501)
* kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)
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):
* kernel-rt: update RT source tree to the RHEL-8.4.z0 source tree (BZ#1957489)
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.
{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 8.\n\nRed 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.", "title": "Topic" }, { "category": "general", "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu-\u003erun (CVE-2021-3501)\n\n* kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)\n\nFor 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.\n\nBug Fix(es):\n\n* kernel-rt: update RT source tree to the RHEL-8.4.z0 source tree (BZ#1957489)", "title": "Details" }, { "category": "legal_disclaimer", "text": "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.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2021:2169", "url": "https://access.redhat.com/errata/RHSA-2021:2169" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1950136", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1950136" }, { "category": "external", "summary": "1953022", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1953022" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_2169.json" } ], "title": "Red Hat Security Advisory: kernel-rt security and bug fix update", "tracking": { "current_release_date": "2024-11-15T11:49:06+00:00", "generator": { "date": "2024-11-15T11:49:06+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.2.1" } }, "id": "RHSA-2021:2169", "initial_release_date": "2021-06-01T09:46:58+00:00", "revision_history": [ { "date": "2021-06-01T09:46:58+00:00", "number": "1", "summary": "Initial version" }, { "date": "2021-06-01T09:46:58+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2024-11-15T11:49:06+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat 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The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu-\u003erun", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue affected Linux kernel versions as shipped with Red Hat Enterprise Linux 8 starting with RHEL-8.4.0 and onward kernel version.", "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" } ], "product_status": { "fixed": [ "NFV-8.4.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-305.3.1.rt7.75.el8_4.src", "NFV-8.4.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-305.3.1.rt7.75.el8_4.x86_64", 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A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: nitro_enclaves stale file descriptors on failed usercopy", "title": "Vulnerability summary" }, { "category": "other", "text": "This flaw is rated as having a Moderate impact because in the default configuration, the issue can only be triggered by a privileged local user (with access to the ne group if this user manages Enclaves VMs).", "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" } ], "product_status": { "fixed": [ "NFV-8.4.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-305.3.1.rt7.75.el8_4.src", 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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.