Vulnerability-Lookup

ubuntu-cve-2021-3998

Vulnerability from osv_ubuntu

Published

2022-02-01 00:00

Modified

2025-07-16 04:56

Summary

Details

A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.

Severity

7.5 (High)


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

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-3998	REPORT
	https://ubuntu.com/security/notices/USN-5310-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-3998	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-doc",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "glibc-source",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc-devtools-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-dbg",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-dev",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-prof",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.35-0ubuntu1"
          },
          {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.35-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.35-0ubuntu1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.35-0ubuntu1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.34-0ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.",
  "id": "UBUNTU-CVE-2021-3998",
  "modified": "2025-07-16T04:56:48Z",
  "published": "2022-02-01T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3998"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5310-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-3998"
    }
  ],
  "related": [
    "USN-5310-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-3998"
  ],
  "withdrawn": "2025-07-18T16:46:31Z"
}

CVE-2021-3998 (GCVE-0-2021-3998)

Vulnerability from cvelistv5 – Published: 2022-08-24 00:00 – Updated: 2025-06-09 15:00

Summary

A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - - Out-of-bounds Read

Assigner

redhat

References

8 references

URL	Tags
https://www.openwall.com/lists/oss-security/2022/…
https://sourceware.org/bugzilla/show_bug.cgi?id=28770
https://sourceware.org/git/gitweb.cgi?p=glibc.git…
https://sourceware.org/git/gitweb.cgi?p=glibc.git…
https://bugzilla.redhat.com/show_bug.cgi?id=2024633
https://access.redhat.com/security/cve/CVE-2021-3998
https://security-tracker.debian.org/tracker/CVE-2…
https://security.netapp.com/advisory/ntap-2022102…

Impacted products

1 product

Vendor	Product	Version
n/a	glibc	Affected: Affects glibc v2.33 and above.

Show details on NVD website

JSON

To clipboard

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              "confidentialityImpact": "HIGH",
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usn-5310-1

Vulnerability from osv_ubuntu

Published

2022-03-01 15:09

Modified

2026-04-27 14:11

Summary

glibc vulnerabilities

Details

Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library iconv feature incorrectly handled certain input sequences. An attacker could possibly use this issue to cause the GNU C Library to hang or crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2016-10228, CVE-2019-25013, CVE-2020-27618, CVE-2020-29562, CVE-2021-3326)

Jason Royes and Samuel Dytrych discovered that the GNU C Library incorrectly handled signed comparisons on ARMv7 targets. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-6096)

It was discovered that the GNU C Library nscd daemon incorrectly handled certain netgroup lookups. An attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-27645)

It was discovered that the GNU C Library wordexp function incorrectly handled certain patterns. An attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-35942)

It was discovered that the GNU C Library realpath function incorrectly handled return values. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 21.10. (CVE-2021-3998)

It was discovered that the GNU C library getcwd function incorrectly handled buffers. An attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-3999)

It was discovered that the GNU C Library sunrpc module incorrectly handled buffer lengths. An attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. (CVE-2022-23218, CVE-2022-23219)

References

URL

Type

	https://ubuntu.com/security/notices/USN-5310-1	ADVISORY
	https://ubuntu.com/security/CVE-2016-10228	REPORT
	https://ubuntu.com/security/CVE-2019-25013	REPORT
	https://ubuntu.com/security/CVE-2020-6096	REPORT
	https://ubuntu.com/security/CVE-2020-27618	REPORT
	https://ubuntu.com/security/CVE-2020-29562	REPORT
	https://ubuntu.com/security/CVE-2021-3326	REPORT
	https://ubuntu.com/security/CVE-2021-3998	REPORT
	https://ubuntu.com/security/CVE-2021-3999	REPORT
	https://ubuntu.com/security/CVE-2021-27645	REPORT
	https://ubuntu.com/security/CVE-2021-35942	REPORT
	https://ubuntu.com/security/CVE-2022-23218	REPORT
	https://ubuntu.com/security/CVE-2022-23219	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-10228",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "negligible",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-25013",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-6096",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-27618",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29562",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3326",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3999",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-35942",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23218",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23219",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-armel",
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          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.27-3ubuntu1.5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.27-3ubuntu1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.26-0ubuntu2",
        "2.26-0ubuntu2.1",
        "2.27-0ubuntu2",
        "2.27-0ubuntu3",
        "2.27-3ubuntu1",
        "2.27-3ubuntu1.2",
        "2.27-3ubuntu1.3",
        "2.27-3ubuntu1.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-10228",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "negligible",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-25013",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-6096",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-27618",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29562",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3326",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3999",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-27645",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-35942",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23218",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23219",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-lse",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-prof",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.31-0ubuntu9.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.31-0ubuntu9.7?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.31-0ubuntu9.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.30-0ubuntu2",
        "2.30-0ubuntu3",
        "2.31-0ubuntu5",
        "2.31-0ubuntu6",
        "2.31-0ubuntu7",
        "2.31-0ubuntu9",
        "2.31-0ubuntu9.1",
        "2.31-0ubuntu9.2",
        "2.31-0ubuntu9.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library\niconv feature incorrectly handled certain input sequences. An attacker\ncould possibly use this issue to cause the GNU C Library to hang or crash,\nresulting in a denial of service. This issue only affected Ubuntu 18.04 LTS\nand Ubuntu 20.04 LTS. (CVE-2016-10228, CVE-2019-25013, CVE-2020-27618,\nCVE-2020-29562, CVE-2021-3326)\n\nJason Royes and Samuel Dytrych discovered that the GNU C Library\nincorrectly handled signed comparisons on ARMv7 targets. A remote attacker\ncould use this issue to cause the GNU C Library to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. This issue only\naffected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-6096)\n\nIt was discovered that the GNU C Library nscd daemon incorrectly handled\ncertain netgroup lookups. An attacker could possibly use this issue to\ncause the GNU C Library to crash, resulting in a denial of service. This\nissue only affected Ubuntu 20.04 LTS. (CVE-2021-27645)\n\nIt was discovered that the GNU C Library wordexp function incorrectly\nhandled certain patterns. An attacker could use this issue to cause the\nGNU C Library to crash, resulting in a denial of service, or possibly\nobtain sensitive information. This issue only affected Ubuntu 18.04 LTS and\nUbuntu 20.04 LTS. (CVE-2021-35942)\n\nIt was discovered that the GNU C Library realpath function incorrectly\nhandled return values. An attacker could possibly use this issue to obtain\nsensitive information. This issue only affected Ubuntu 21.10.\n(CVE-2021-3998)\n\nIt was discovered that the GNU C library getcwd function incorrectly\nhandled buffers. An attacker could use this issue to cause the GNU C\nLibrary to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2021-3999)\n\nIt was discovered that the GNU C Library sunrpc module incorrectly handled\nbuffer lengths. An attacker could possibly use this issue to cause the GNU\nC Library to crash, resulting in a denial of service. (CVE-2022-23218,\nCVE-2022-23219)\n",
  "id": "USN-5310-1",
  "modified": "2026-04-27T14:11:27Z",
  "published": "2022-03-01T15:09:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5310-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-10228"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-25013"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-6096"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27618"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29562"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3326"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3998"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3999"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-27645"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-35942"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-23218"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-23219"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "glibc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2016-10228",
    "UBUNTU-CVE-2019-25013",
    "UBUNTU-CVE-2020-6096",
    "UBUNTU-CVE-2020-27618",
    "UBUNTU-CVE-2020-29562",
    "UBUNTU-CVE-2021-3326",
    "UBUNTU-CVE-2021-3998",
    "UBUNTU-CVE-2021-3999",
    "UBUNTU-CVE-2021-27645",
    "UBUNTU-CVE-2021-35942",
    "UBUNTU-CVE-2022-23218",
    "UBUNTU-CVE-2022-23219"
  ]
}

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.

Action not permitted

ubuntu-cve-2021-3998

Vulnerability from osv_ubuntu

CVE-2021-3998 (GCVE-0-2021-3998)

usn-5310-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature