rhsa-2022_8831
Vulnerability from csaf_redhat
Published
2022-12-06 14:55
Modified
2024-11-15 15:01
Summary
Red Hat Security Advisory: kpatch-patch security update
Notes
Topic
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.6 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
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: KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)
* kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() (CVE-2022-2639)
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": "kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region",
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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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"url": "https://access.redhat.com/errata/RHSA-2022:8831"
},
{
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"title": "kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region"
},
{
"cve": "CVE-2022-2639",
"cwe": {
"id": "CWE-681",
"name": "Incorrect Conversion between Numeric Types"
},
"discovery_date": "2022-05-12T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2084479"
}
],
"notes": [
{
"category": "description",
"text": "An integer coercion error was found in the openvswitch kernel module. Given a sufficiently large number of actions, while copying and reserving memory for a new action of a new flow, the reserve_sfa_size() function does not return -EMSGSIZE as expected, potentially leading to an out-of-bounds write access. This flaw allows a local user to crash or potentially escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The `openvswitch` is not supported out of the Layered Products subscriptions (OCP, OSP, RHV). There are no Layered Products based on Red Hat Enterprise Linux 7 at the present time. Therefore, this CVE is not planned to be addressed on Red Hat Enterprise Linux 7.",
"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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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2022-2639"
},
{
"category": "external",
"summary": "RHBZ#2084479",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2084479"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2022-2639",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-2639"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-2639",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-2639"
}
],
"release_date": "2022-04-15T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2022-12-06T14:55:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2022:8831"
},
{
"category": "workaround",
"details": "To mitigate this issue, it is possible to prevent the affected code from being loaded by blocklisting the openvswitch kernel module. For instructions relating to blocklisting a kernel module, please see https://access.redhat.com/solutions/41278.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size()"
}
]
}
Loading...
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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.