Vulnerability-Lookup

RHSA-2022:0529

Vulnerability from csaf_redhat - Published: 2022-02-15 09:27 - Updated: 2026-11-07 05:28

Summary

Red Hat Security Advisory: kernel security update

Severity

Important

Notes

Topic: An update for kernel is now available for Red Hat Enterprise Linux 7.3 Advanced 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 packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466) * kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155) 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.

CVE-2020-0466

A flaw was found in the Linux kernel. A logic error in eventpoll.c can cause a use-after-free, leading to a local escalation of privilege with no additional execution privileges. User interaction is not needed for exploitation. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416 - Use After Free

Affected products

Fixed 24 products

Product	Version	Remediation
Unresolved product id: 7Server-7.3.AUS:kernel-0:3.10.0-514.97.1.el7.src	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-abi-whitelists-0:3.10.0-514.97.1.el7.noarch	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-debug-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-debug-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-debug-devel-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-debuginfo-common-x86_64-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-devel-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-doc-0:3.10.0-514.97.1.el7.noarch	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-tools-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-tools-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:kernel-tools-libs-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:perf-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:perf-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:python-perf-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-7.3.AUS:python-perf-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:kernel-debug-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:kernel-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:kernel-debuginfo-common-x86_64-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:kernel-tools-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:kernel-tools-libs-devel-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:perf-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: 7Server-optional-7.3.AUS:python-perf-debuginfo-0:3.10.0-514.97.1.el7.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

CVE-2021-4155

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE-131 - Incorrect Calculation of Buffer Size

Affected products

Fixed 24 products, the same list as for CVE-2020-0466

Threats

Impact Important

References

14 references

URL	Category
https://access.redhat.com/errata/RHSA-2022:0529	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=1920480	external
https://bugzilla.redhat.com/show_bug.cgi?id=2034813	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2020-0466	self
https://bugzilla.redhat.com/show_bug.cgi?id=1920480	external
https://www.cve.org/CVERecord?id=CVE-2020-0466	external
https://nvd.nist.gov/vuln/detail/CVE-2020-0466	external
https://access.redhat.com/security/cve/CVE-2021-4155	self
https://bugzilla.redhat.com/show_bug.cgi?id=2034813	external
https://www.cve.org/CVERecord?id=CVE-2021-4155	external
https://nvd.nist.gov/vuln/detail/CVE-2021-4155	external
https://git.kernel.org/pub/scm/linux/kernel/git/t…	external

Acknowledgments

Virtuozzo Kernel team Kirill Tkhai

JSON

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          "text": "kernel: use after free in eventpoll.c may lead to escalation of privilege",
          "title": "Vulnerability summary"
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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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      "title": "kernel: use after free in eventpoll.c may lead to escalation of privilege"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Kirill Tkhai"
          ],
          "organization": "Virtuozzo Kernel team"
        }
      ],
      "cve": "CVE-2021-4155",
      "cwe": {
        "id": "CWE-131",
        "name": "Incorrect Calculation of Buffer Size"
      },
      "discovery_date": "2021-12-18T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2034813"
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      ],
      "notes": [
        {
          "category": "description",
          "text": "A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-4155"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2021-4155"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-4155",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4155"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79",
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79"
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      "release_date": "2022-01-10T06:36:00+00:00",
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          "date": "2022-02-15T09:27:07+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\n\nThe system must be rebooted for this update to take effect.",
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      "title": "kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL"
    }
  ]
}

CVE-2020-0466 (GCVE-0-2020-0466)

Vulnerability from cvelistv5 – Published: 2020-12-14 21:50 – Updated: 2024-08-04 06:02

Summary

In do_epoll_ctl and ep_loop_check_proc of eventpoll.c, there is a possible use after free due to a logic error. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-147802478References: Upstream kernel

Severity

No CVSS data available.

CWE

Elevation of privilege

Assigner

google_android CNA under the Google root

CNA scorecard E 39/100 over 336 records in the last 180 days details

References

1 reference

URL	Tags
https://source.android.com/security/bulletin/2020-12-01	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	Android	Affected: Android kernel

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T06:02:51.841Z",
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        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://source.android.com/security/bulletin/2020-12-01"
          }
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        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "vendor": "n/a",
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          "value": "In do_epoll_ctl and ep_loop_check_proc of eventpoll.c, there is a possible use after free due to a logic error. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-147802478References: Upstream kernel"
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "description": "Elevation of privilege",
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      ],
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CVE-2021-4155 (GCVE-0-2021-4155)

Vulnerability from cvelistv5 – Published: 2022-08-24 15:10 – Updated: 2024-08-03 17:16

Summary

Severity

No CVSS data available.

CWE

CWE-131 - - Incorrect Calculation of Buffer Size

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1131 records in the last 180 days details

References

5 references

URL	Tags
https://www.openwall.com/lists/oss-security/2022/…	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=2034813	x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2021-4155	x_refsource_MISC
https://security-tracker.debian.org/tracker/CVE-2…	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	kernel	Affected: Fixed in Kernel v5.16

Show details on NVD website

JSON

To clipboard

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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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.

Action not permitted

RHSA-2022:0529

CVE-2020-0466 (GCVE-0-2020-0466)

CVE-2021-4155 (GCVE-0-2021-4155)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour