rhsa-2021_3768
Vulnerability from csaf_redhat
Published
2021-10-12 09:39
Modified
2024-11-05 23:57
Summary
Red Hat Security Advisory: kpatch-patch security update
Notes
Topic
An update for kpatch-patch 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
This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)
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.
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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"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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"title": "kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks"
},
{
"cve": "CVE-2021-37576",
"cwe": {
"id": "CWE-119",
"name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
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"discovery_date": "2021-06-26T00:00:00+00:00",
"ids": [
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"text": "1986506"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtas_args.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: powerpc: KVM guest OS users can cause host OS memory corruption",
"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"
}
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{
"category": "external",
"summary": "RHBZ#1986506",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1986506"
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{
"category": "external",
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{
"category": "external",
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{
"category": "external",
"summary": "https://www.openwall.com/lists/oss-security/2021/07/26/1",
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"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: powerpc: KVM guest OS users can cause host OS memory corruption"
}
]
}
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- 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.