Vulnerability-Lookup

OESA-2022-1504 (CVE-2021-4155)

Vulnerability from osv_openeuler – Published: 2022-01-28 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

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.(CVE-2021-4155)

In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn t properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.(CVE-2021-45485)

In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.(CVE-2021-45486)

Severity

7.5 (High)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-4155	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-45485	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-45486	ADVISORY

JSON

To clipboard

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  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\r\n\r\nA 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.(CVE-2021-4155)\n\nIn the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn t properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.(CVE-2021-45485)\n\nIn the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.(CVE-2021-45486)",
  "id": "OESA-2022-1504",
  "modified": "2026-08-06T11:04:46Z",
  "published": "2022-01-28T11:04:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1504"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4155"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45485"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45486"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2021-4155",
    "CVE-2021-45485",
    "CVE-2021-45486"
  ]
}

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 redhat root

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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CVE-2021-45485 (GCVE-0-2021-45485)

Vulnerability from cvelistv5 – Published: 2021-12-25 01:05 – Updated: 2024-08-04 04:39

Summary

In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_MISC
https://arxiv.org/pdf/2112.09604.pdf	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://www.oracle.com/security-alerts/cpujul2022.html	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2022012…	x_refsource_CONFIRM

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CVE-2021-45486 (GCVE-0-2021-45486)

Vulnerability from cvelistv5 – Published: 2021-12-25 01:04 – Updated: 2024-08-04 04:39

Summary

In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_MISC
https://arxiv.org/pdf/2112.09604.pdf	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/s…	x_refsource_MISC
https://www.oracle.com/security-alerts/cpujul2022.html	x_refsource_MISC

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.

Detection rules are retrieved from Rulezet.

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

OESA-2022-1504 (CVE-2021-4155)

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

CVE-2021-45485 (GCVE-0-2021-45485)

CVE-2021-45486 (GCVE-0-2021-45486)

Tags

Sightings

Nomenclature

Related by attack behaviour