rhsa-2021_4875
Vulnerability from csaf_redhat
Published
2021-11-30 15:38
Modified
2024-11-15 09:43
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 8.2 Extended Update Support.
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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)
* kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)
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 latest RHEL-8.2.z13 Batch source tree (BZ#2020969)
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.
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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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)\n\n* kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)\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 latest RHEL-8.2.z13 Batch source tree (BZ#2020969)", "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-2021:4875", "url": "https://access.redhat.com/errata/RHSA-2021:4875" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1974319", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1974319" }, { "category": "external", "summary": "2005258", 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This could allow a local attacker to crash the system, corrupt memory or escalate privileges.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free", "title": "Vulnerability summary" }, { "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-8.2.0.Z.EUS:kernel-rt-0:4.18.0-193.70.1.rt13.120.el8_2.src", "NFV-8.2.0.Z.EUS:kernel-rt-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", "NFV-8.2.0.Z.EUS:kernel-rt-core-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", "NFV-8.2.0.Z.EUS:kernel-rt-debug-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", "NFV-8.2.0.Z.EUS:kernel-rt-debug-core-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", 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"Jay Shin" ], "organization": "Red Hat", "summary": "This issue was discovered by Red Hat." } ], "cve": "CVE-2021-20317", "cwe": { "id": "CWE-665", "name": "Improper Initialization" }, "discovery_date": "2021-09-06T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2005258" } ], "notes": [ { "category": "description", "text": "A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP. The highest threat from this vulnerability is system availability.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: timer tree corruption leads to missing wakeup and system freeze", "title": "Vulnerability summary" }, { "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-8.2.0.Z.EUS:kernel-rt-0:4.18.0-193.70.1.rt13.120.el8_2.src", "NFV-8.2.0.Z.EUS:kernel-rt-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", "NFV-8.2.0.Z.EUS:kernel-rt-core-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", "NFV-8.2.0.Z.EUS:kernel-rt-debug-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", "NFV-8.2.0.Z.EUS:kernel-rt-debug-core-0:4.18.0-193.70.1.rt13.120.el8_2.x86_64", 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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.