Vulnerability-Lookup

UBUNTU-CVE-2026-9538 (CVE-2026-9538)

Vulnerability from osv_ubuntu – Published: 2026-05-26 02:16 – Updated: 2026-09-09 17:34 – Source website

Details

Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header. _read_tar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value. A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.

Severity

7.5 (High)


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

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-9538	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-9538	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT
	https://github.com/jib/archive-tar-new/commit/f9a…	REPORT
	https://metacpan.org/release/BINGOS/Archive-Tar-3…	REPORT
	http://www.openwall.com/lists/oss-security/2026/05/26/4	REPORT
	https://ubuntu.com/security/notices/USN-8684-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcgi-fast-perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
          },
          {
            "binary_name": "libperl5.18",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
          },
          {
            "binary_name": "perl-modules",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.18.2-2ubuntu1.7+esm9?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.14.2-21build1",
        "5.18.1-4",
        "5.18.1-4build1",
        "5.18.1-5",
        "5.18.2-2",
        "5.18.2-2ubuntu1",
        "5.18.2-2ubuntu1.1",
        "5.18.2-2ubuntu1.3",
        "5.18.2-2ubuntu1.4",
        "5.18.2-2ubuntu1.6",
        "5.18.2-2ubuntu1.7",
        "5.18.2-2ubuntu1.7+esm3",
        "5.18.2-2ubuntu1.7+esm4",
        "5.18.2-2ubuntu1.7+esm5",
        "5.18.2-2ubuntu1.7+esm7",
        "5.18.2-2ubuntu1.7+esm8",
        "5.18.2-2ubuntu1.7+esm9"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.22",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
          },
          {
            "binary_name": "perl-modules-5.22",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.22.1-9ubuntu0.9+esm4?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.20.2-6",
        "5.22.1-3",
        "5.22.1-4",
        "5.22.1-5",
        "5.22.1-7",
        "5.22.1-8",
        "5.22.1-9",
        "5.22.1-9ubuntu0.2",
        "5.22.1-9ubuntu0.3",
        "5.22.1-9ubuntu0.5",
        "5.22.1-9ubuntu0.6",
        "5.22.1-9ubuntu0.9",
        "5.22.1-9ubuntu0.9+esm1",
        "5.22.1-9ubuntu0.9+esm2",
        "5.22.1-9ubuntu0.9+esm3",
        "5.22.1-9ubuntu0.9+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.26",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
          },
          {
            "binary_name": "perl-modules-5.26",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.26.1-6ubuntu0.7+esm4?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.26.0-8ubuntu1",
        "5.26.1-2ubuntu1",
        "5.26.1-3",
        "5.26.1-4",
        "5.26.1-4build1",
        "5.26.1-5",
        "5.26.1-6",
        "5.26.1-6ubuntu0.1",
        "5.26.1-6ubuntu0.2",
        "5.26.1-6ubuntu0.3",
        "5.26.1-6ubuntu0.5",
        "5.26.1-6ubuntu0.6",
        "5.26.1-6ubuntu0.7",
        "5.26.1-6ubuntu0.7+esm2",
        "5.26.1-6ubuntu0.7+esm3",
        "5.26.1-6ubuntu0.7+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
          },
          {
            "binary_name": "perl-modules-5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.30.0-9ubuntu0.5+esm4?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.28.1-6build1",
        "5.30.0-7",
        "5.30.0-9",
        "5.30.0-9build1",
        "5.30.0-9ubuntu0.2",
        "5.30.0-9ubuntu0.3",
        "5.30.0-9ubuntu0.4",
        "5.30.0-9ubuntu0.5",
        "5.30.0-9ubuntu0.5+esm2",
        "5.30.0-9ubuntu0.5+esm3",
        "5.30.0-9ubuntu0.5+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.34",
            "binary_version": "5.34.0-3ubuntu1.9"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.34.0-3ubuntu1.9"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.34.0-3ubuntu1.9"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.34.0-3ubuntu1.9"
          },
          {
            "binary_name": "perl-modules-5.34",
            "binary_version": "5.34.0-3ubuntu1.9"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.34.0-3ubuntu1.9?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.32.1-3ubuntu3",
        "5.34.0-3ubuntu1",
        "5.34.0-3ubuntu1.1",
        "5.34.0-3ubuntu1.2",
        "5.34.0-3ubuntu1.3",
        "5.34.0-3ubuntu1.4",
        "5.34.0-3ubuntu1.5",
        "5.34.0-3ubuntu1.7",
        "5.34.0-3ubuntu1.8",
        "5.34.0-3ubuntu1.9"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libperl5.38t64",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl-modules-5.38",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.38.2-3.2ubuntu0.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.38.2-3.2ubuntu0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.36.0-9ubuntu1",
        "5.36.0-10ubuntu1",
        "5.38.2-3",
        "5.38.2-3.2",
        "5.38.2-3.2build1",
        "5.38.2-3.2build2",
        "5.38.2-3.2build2.1",
        "5.38.2-3.2ubuntu0.1",
        "5.38.2-3.2ubuntu0.2",
        "5.38.2-3.2ubuntu0.3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.40",
            "binary_version": "5.40.1-6ubuntu0.1"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.40.1-6ubuntu0.1"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.40.1-6ubuntu0.1"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.40.1-6ubuntu0.1"
          },
          {
            "binary_name": "perl-modules-5.40",
            "binary_version": "5.40.1-6ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.40.1-6ubuntu0.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.40.1-2",
        "5.40.1-3",
        "5.40.1-5",
        "5.40.1-6",
        "5.40.1-6build1",
        "5.40.1-6ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.40",
            "binary_version": "5.40.1-7ubuntu0.3"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.40.1-7ubuntu0.3"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.40.1-7ubuntu0.3"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.40.1-7ubuntu0.3"
          },
          {
            "binary_name": "perl-modules-5.40",
            "binary_version": "5.40.1-7ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.40.1-7ubuntu0.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.40.1-6build1",
        "5.40.1-7build1",
        "5.40.1-7ubuntu0.1",
        "5.40.1-7ubuntu0.2",
        "5.40.1-7ubuntu0.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header. _read_tar() reads each entry\u0027s payload with $handle-\u003eread($$data, $block), where $block is derived from the entry\u0027s 12-byte size field in the tar header with no upper bound on that value. A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.",
  "id": "UBUNTU-CVE-2026-9538",
  "modified": "2026-09-09T17:34:20Z",
  "published": "2026-05-26T02:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-9538"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-9538"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/40396448/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7.patch"
    },
    {
      "type": "REPORT",
      "url": "https://metacpan.org/release/BINGOS/Archive-Tar-3.10/changes"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/26/4"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8684-1"
    }
  ],
  "related": [
    "USN-8684-1"
  ],
  "schema_version": "1.7.0",
  "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:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-9538"
  ]
}

CVE-2026-9538 (GCVE-0-2026-9538)

Vulnerability from cvelistv5 – Published: 2026-05-26 00:18 – Updated: 2026-05-28 13:16

Title

Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-28 13:16 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

CPANSec redhat root

References

3 references

URL	Tags
https://github.com/jib/archive-tar-new/commit/f9a…	patch
https://metacpan.org/release/BINGOS/Archive-Tar-3…	release-notes
http://www.openwall.com/lists/oss-security/2026/05/26/4

Impacted products

1 product

Vendor	Product	Version
BINGOS	Archive::Tar	Affected: 0 , < 3.10 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-26T03:06:03.290Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/26/4"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-9538",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T13:16:04.042321Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T13:16:08.447Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Archive-Tar",
          "product": "Archive::Tar",
          "programFiles": [
            "lib/Archive/Tar.pm"
          ],
          "programRoutines": [
            {
              "name": "Archive::Tar::_read_tar"
            }
          ],
          "repo": "https://github.com/jib/archive-tar-new",
          "vendor": "BINGOS",
          "versions": [
            {
              "lessThan": "3.10",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.\n\n_read_tar() reads each entry\u0027s payload with $handle-\u003eread($$data, $block), where $block is derived from the entry\u0027s 12-byte size field in the tar header with no upper bound on that value.\n\nA crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-789",
              "description": "CWE-789 Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-26T00:18:43.704Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/BINGOS/Archive-Tar-3.10/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Archive::Tar 3.10 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-25T00:00:00.000Z",
          "value": "Issue reported."
        },
        {
          "lang": "en",
          "time": "2026-05-25T00:00:00.000Z",
          "value": "Version 3.10 released."
        }
      ],
      "title": "Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-9538",
    "datePublished": "2026-05-26T00:18:43.704Z",
    "dateReserved": "2026-05-25T23:04:04.116Z",
    "dateUpdated": "2026-05-28T13:16:08.447Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

USN-8684-1 (UBUNTU-CVE-2025-15649)

Vulnerability from osv_ubuntu – Published: 2026-08-27 11:10 – Updated: 2026-08-27 11:10 – Source website

Summary

perl vulnerabilities

Details

It was discovered that Perl incorrectly handled certain arguments to Socket and pack/unpack functions. An attacker could possibly use this issue to read sensitive information from memory. (CVE-2026-12087, CVE-2026-57432)

It was discovered that Perl incorrectly handled regular expressions with a large number of alternation branches. An attacker could possibly use this issue to cause incorrect matching results. (CVE-2026-13221)

It was discovered that Perl incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-57433, CVE-2025-15649, CVE-2026-48959, CVE-2026-9538)

It was discovered that Perl incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2026-48962)

It was discovered that Perl incorrectly handled credential headers during cross-origin redirects in HTTP::Tiny. An attacker could possibly use this issue to expose sensitive information. (CVE-2026-7017)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8684-1	ADVISORY
	https://ubuntu.com/security/CVE-2025-15649	REPORT
	https://ubuntu.com/security/CVE-2026-7017	REPORT
	https://ubuntu.com/security/CVE-2026-9538	REPORT
	https://ubuntu.com/security/CVE-2026-12087	REPORT
	https://ubuntu.com/security/CVE-2026-13221	REPORT
	https://ubuntu.com/security/CVE-2026-48959	REPORT
	https://ubuntu.com/security/CVE-2026-48962	REPORT
	https://ubuntu.com/security/CVE-2026-57432	REPORT
	https://ubuntu.com/security/CVE-2026-57433	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-15649",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-7017",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-9538",
              "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:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-12087",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-13221",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48959",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48962",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "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-2026-57432",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-57433",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libperl5.38t64",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          },
          {
            "binary_name": "perl-modules-5.38",
            "binary_version": "5.38.2-3.2ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.38.2-3.2ubuntu0.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.38.2-3.2ubuntu0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.36.0-9ubuntu1",
        "5.36.0-10ubuntu1",
        "5.38.2-3",
        "5.38.2-3.2",
        "5.38.2-3.2build1",
        "5.38.2-3.2build2",
        "5.38.2-3.2build2.1",
        "5.38.2-3.2ubuntu0.1",
        "5.38.2-3.2ubuntu0.2",
        "5.38.2-3.2ubuntu0.3"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Perl incorrectly handled certain arguments to\nSocket and pack/unpack functions. An attacker could possibly use this\nissue to read sensitive information from memory.\n(CVE-2026-12087, CVE-2026-57432)\n\nIt was discovered that Perl incorrectly handled regular expressions\nwith a large number of alternation branches. An attacker could\npossibly use this issue to cause incorrect matching results.\n(CVE-2026-13221)\n\nIt was discovered that Perl incorrectly handled certain files. An\nattacker could possibly use this issue to cause a denial of service.\n(CVE-2026-57433, CVE-2025-15649, CVE-2026-48959, CVE-2026-9538)\n\nIt was discovered that Perl incorrectly handled certain inputs. An\nattacker could possibly use this issue to execute arbitrary code.\n(CVE-2026-48962)\n\nIt was discovered that Perl incorrectly handled credential headers\nduring cross-origin redirects in HTTP::Tiny. An attacker could\npossibly use this issue to expose sensitive information.\n(CVE-2026-7017)",
  "id": "USN-8684-1",
  "modified": "2026-08-27T11:10:17Z",
  "published": "2026-08-27T11:10:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8684-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-15649"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-7017"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-9538"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-12087"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-13221"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48959"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48962"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-57432"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-57433"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "perl vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-15649",
    "UBUNTU-CVE-2026-7017",
    "UBUNTU-CVE-2026-9538",
    "UBUNTU-CVE-2026-12087",
    "UBUNTU-CVE-2026-13221",
    "UBUNTU-CVE-2026-48959",
    "UBUNTU-CVE-2026-48962",
    "UBUNTU-CVE-2026-57432",
    "UBUNTU-CVE-2026-57433"
  ]
}

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.

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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-2026-9538 (CVE-2026-9538)

CVE-2026-9538 (GCVE-0-2026-9538)

USN-8684-1 (UBUNTU-CVE-2025-15649)

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Nomenclature

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