Vulnerability-Lookup

UBUNTU-CVE-2026-19499 (CVE-2026-19499)

Vulnerability from osv_ubuntu – Published: 2026-08-27 00:00 – Updated: 2026-09-16 11:31 – Source website

Details

Calling strfmon and strfmon_l in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding. Exploitation requires an application code path that calls strfmon or strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller. At the time of publication, no network-facing application impact is known.

Severity

7.7 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-19499	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-19499	REPORT
	https://ubuntu.com/security/notices/USN-8737-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8737-2	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.39-0ubuntu8.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.39-0ubuntu8.9?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.39-0ubuntu8.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.38-1ubuntu6",
        "2.38-3ubuntu1",
        "2.39-0ubuntu1",
        "2.39-0ubuntu2",
        "2.39-0ubuntu6",
        "2.39-0ubuntu8",
        "2.39-0ubuntu8.1",
        "2.39-0ubuntu8.2",
        "2.39-0ubuntu8.3",
        "2.39-0ubuntu8.4",
        "2.39-0ubuntu8.5",
        "2.39-0ubuntu8.6",
        "2.39-0ubuntu8.7",
        "2.39-0ubuntu8.8"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-gconv-modules-extra",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.43-2ubuntu2.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.43-2ubuntu2.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.43-2ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.42-0ubuntu3",
        "2.42-2ubuntu1",
        "2.42-2ubuntu2",
        "2.42-2ubuntu4",
        "2.42-2ubuntu5",
        "2.43-2ubuntu1",
        "2.43-2ubuntu2",
        "2.43-2ubuntu2.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Calling strfmon and strfmon_l in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding. Exploitation requires an application code path that calls strfmon or strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller. At the time of publication, no network-facing application impact is known.",
  "id": "UBUNTU-CVE-2026-19499",
  "modified": "2026-09-16T11:31:18Z",
  "published": "2026-08-27T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-19499"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-19499"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8737-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8737-2"
    }
  ],
  "related": [
    "USN-8737-1",
    "USN-8737-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-19499"
  ]
}

CVE-2026-19499 (GCVE-0-2026-19499)

Vulnerability from cvelistv5 – Published: 2026-09-14 17:11 – Updated: 2026-09-14 19:40

Title

Buffer overflow in strfmon and strfmon_l right-justification padding

Summary

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 19:40 UTC

CWE

CWE-122 - Heap-based buffer overflow

Assigner

glibc redhat root Scorecard

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34510	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob_pl…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.38 , ≤ 2.44 (custom)

Date Public

2026-08-11 04:00

Credits

AISLE in partnership with Red Hat

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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            "other": {
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                "id": "CVE-2026-19499",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T19:40:33.799943Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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          "product": "glibc",
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      "datePublic": "2026-08-11T04:00:00.000Z",
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      "impacts": [
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              "value": "CAPEC-100 Overflow Buffers"
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=34510"
        },
        {
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            "vendor-advisory"
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          "url": "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0017"
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      "source": {
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    "datePublished": "2026-09-14T17:11:12.243Z",
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}

USN-8737-1 (UBUNTU-CVE-2026-6368)

Vulnerability from osv_ubuntu – Published: 2026-09-08 15:17 – Updated: 2026-09-17 10:33 – Source website

Summary

glibc vulnerabilities

Details

It was discovered that GNU C Library had a buffer overflow in the strfmon function when handling right-justification padding. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-19499)

It was discovered that GNU C Library had an out-of-bounds stack array access in the tdelete function. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-19542)

It was discovered that GNU C Library incorrectly handled memory when calling wordexp with the WRDE_APPEND flag. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-6368)

It was discovered that GNU C Library had a stack overflow in the wordexp function when expanding paths beginning with a tilde followed by a long username. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-6791)

It was discovered that GNU C Library had a hang in the SHIFT_JISX0213 character set converter. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-77117)

It was discovered that GNU C Library had a hang in the EUC_JISX0213 character set converter. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-80489)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8737-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-6368	REPORT
	https://ubuntu.com/security/CVE-2026-6791	REPORT
	https://ubuntu.com/security/CVE-2026-19499	REPORT
	https://ubuntu.com/security/CVE-2026-19542	REPORT
	https://ubuntu.com/security/CVE-2026-77117	REPORT
	https://ubuntu.com/security/CVE-2026-80489	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-6368",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:Green",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-6791",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:L/SA:H/E:U",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-19542",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-77117",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-80489",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
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            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.35-0ubuntu3.15"
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          {
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            "binary_version": "2.35-0ubuntu3.15"
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          {
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            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6-prof",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.35-0ubuntu3.15"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.35-0ubuntu3.15"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.35-0ubuntu3.15?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.35-0ubuntu3.15"
            }
          ],
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        }
      ],
      "versions": [
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        "2.35-0ubuntu3.4",
        "2.35-0ubuntu3.5",
        "2.35-0ubuntu3.6",
        "2.35-0ubuntu3.7",
        "2.35-0ubuntu3.8",
        "2.35-0ubuntu3.9",
        "2.35-0ubuntu3.10",
        "2.35-0ubuntu3.11",
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        "2.35-0ubuntu3.14"
      ]
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              "id": "CVE-2026-6368",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:Green",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-6791",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:L/SA:H/E:U",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-19499",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-19542",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-77117",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-80489",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc-gconv-modules-extra",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.43-2ubuntu2.4"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.43-2ubuntu2.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.43-2ubuntu2.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.43-2ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.42-0ubuntu3",
        "2.42-2ubuntu1",
        "2.42-2ubuntu2",
        "2.42-2ubuntu4",
        "2.42-2ubuntu5",
        "2.43-2ubuntu1",
        "2.43-2ubuntu2",
        "2.43-2ubuntu2.3"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that GNU C Library had a buffer overflow in the strfmon\nfunction when handling right-justification padding. An attacker could\npossibly use this issue to cause a denial of service or execute arbitrary\ncode. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-19499)\n\nIt was discovered that GNU C Library had an out-of-bounds stack array\naccess in the tdelete function. An attacker could possibly use this issue\nto cause a denial of service or execute arbitrary code. (CVE-2026-19542)\n\nIt was discovered that GNU C Library incorrectly handled memory when\ncalling wordexp with the WRDE_APPEND flag. An attacker could possibly use\nthis issue to cause a denial of service. (CVE-2026-6368)\n\nIt was discovered that GNU C Library had a stack overflow in the wordexp\nfunction when expanding paths beginning with a tilde followed by a long\nusername. An attacker could possibly use this issue to cause a denial of\nservice or execute arbitrary code. (CVE-2026-6791)\n\nIt was discovered that GNU C Library had a hang in the SHIFT_JISX0213\ncharacter set converter. An attacker could possibly use this issue to cause\na denial of service. (CVE-2026-77117)\n\nIt was discovered that GNU C Library had a hang in the EUC_JISX0213\ncharacter set converter. An attacker could possibly use this issue to cause\na denial of service. (CVE-2026-80489)",
  "id": "USN-8737-1",
  "modified": "2026-09-17T10:33:46Z",
  "published": "2026-09-08T15:17:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8737-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6368"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6791"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-19499"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-19542"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-77117"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-80489"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "glibc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-6368",
    "UBUNTU-CVE-2026-6791",
    "UBUNTU-CVE-2026-19499",
    "UBUNTU-CVE-2026-19542",
    "UBUNTU-CVE-2026-77117",
    "UBUNTU-CVE-2026-80489"
  ]
}

USN-8737-2 (UBUNTU-CVE-2026-6368)

Vulnerability from osv_ubuntu – Published: 2026-09-10 11:25 – Updated: 2026-09-17 10:33 – Source website

Summary

glibc vulnerabilities

Details

USN-8737-1 fixed vulnerabilities in GNU C Library. This update provides the corresponding fixes for Ubuntu 24.04 LTS.

Original advisory details:

It was discovered that GNU C Library incorrectly handled memory when calling wordexp with the WRDE_APPEND flag. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-6368)

It was discovered that GNU C Library had a hang in the SHIFT_JISX0213 character set converter. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-77117)

It was discovered that GNU C Library had a hang in the EUC_JISX0213 character set converter. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-80489)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8737-2	ADVISORY
	https://ubuntu.com/security/CVE-2026-6368	REPORT
	https://ubuntu.com/security/CVE-2026-6791	REPORT
	https://ubuntu.com/security/CVE-2026-19499	REPORT
	https://ubuntu.com/security/CVE-2026-19542	REPORT
	https://ubuntu.com/security/CVE-2026-77117	REPORT
	https://ubuntu.com/security/CVE-2026-80489	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-6368",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:Green",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-6791",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:L/SA:H/E:U",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-19499",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-19542",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-77117",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-80489",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.39-0ubuntu8.9"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.39-0ubuntu8.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.39-0ubuntu8.9?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.39-0ubuntu8.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.38-1ubuntu6",
        "2.38-3ubuntu1",
        "2.39-0ubuntu1",
        "2.39-0ubuntu2",
        "2.39-0ubuntu6",
        "2.39-0ubuntu8",
        "2.39-0ubuntu8.1",
        "2.39-0ubuntu8.2",
        "2.39-0ubuntu8.3",
        "2.39-0ubuntu8.4",
        "2.39-0ubuntu8.5",
        "2.39-0ubuntu8.6",
        "2.39-0ubuntu8.7",
        "2.39-0ubuntu8.8"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-8737-1 fixed vulnerabilities in GNU C Library. This update provides\nthe corresponding fixes for Ubuntu 24.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that GNU C Library had a buffer overflow in the strfmon\n function when handling right-justification padding. An attacker could\n possibly use this issue to cause a denial of service or execute arbitrary\n code. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-19499)\n\n It was discovered that GNU C Library had an out-of-bounds stack array\n access in the tdelete function. An attacker could possibly use this issue\n to cause a denial of service or execute arbitrary code. (CVE-2026-19542)\n\n It was discovered that GNU C Library incorrectly handled memory when\n calling wordexp with the WRDE_APPEND flag. An attacker could possibly use\n this issue to cause a denial of service. (CVE-2026-6368)\n\n It was discovered that GNU C Library had a stack overflow in the wordexp\n function when expanding paths beginning with a tilde followed by a long\n username. An attacker could possibly use this issue to cause a denial of\n service or execute arbitrary code. (CVE-2026-6791)\n\n It was discovered that GNU C Library had a hang in the SHIFT_JISX0213\n character set converter. An attacker could possibly use this issue to cause\n a denial of service. (CVE-2026-77117)\n\n It was discovered that GNU C Library had a hang in the EUC_JISX0213\n character set converter. An attacker could possibly use this issue to cause\n a denial of service. (CVE-2026-80489)",
  "id": "USN-8737-2",
  "modified": "2026-09-17T10:33:46Z",
  "published": "2026-09-10T11:25:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8737-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6368"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6791"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-19499"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-19542"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-77117"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-80489"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "glibc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-6368",
    "UBUNTU-CVE-2026-6791",
    "UBUNTU-CVE-2026-19499",
    "UBUNTU-CVE-2026-19542",
    "UBUNTU-CVE-2026-77117",
    "UBUNTU-CVE-2026-80489"
  ]
}

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.

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

UBUNTU-CVE-2026-19499 (CVE-2026-19499)

CVE-2026-19499 (GCVE-0-2026-19499)

USN-8737-1 (UBUNTU-CVE-2026-6368)

USN-8737-2 (UBUNTU-CVE-2026-6368)

Tags

Sightings

Nomenclature

Related by attack behaviour