Vulnerability-Lookup

CVE-2026-8376 (GCVE-0-2026-8376)

Vulnerability from cvelistv5 – Published: 2026-05-25 23:53 – Updated: 2026-05-27 18:04

Title

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds

Summary

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

Severity

7.3 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-680 - Integer Overflow to Buffer Overflow

Assigner

CPANSec

References

2 references

URL	Tags
https://github.com/Perl/perl5/commit/5e7f119eb2bb…	patch
http://www.openwall.com/lists/oss-security/2026/05/26/1

Impacted products

1 product

Vendor	Product	Version
SHAY	perl	Affected: 0 , ≤ 5.43.10 (custom)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-8376

Vulnerability from fkie_nvd - Published: 2026-05-26 00:16 - Updated: 2026-06-17 11:03

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/Perl/perl5/commit/5e7f119eb2bb1181be908701f22bf7068e722f1c.patch	Patch
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/26/1	Mailing List, Third Party Advisory

Impacted products

	Vendor	Product	Version
	perl	perl	*

JSON

To clipboard

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GHSA-MPXQ-89H3-QC47

Vulnerability from github – Published: 2026-05-26 13:30 – Updated: 2026-05-27 21:31

Details

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds.

Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer.

A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

Severity

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8376"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-680"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-26T00:16:57Z",
    "severity": "CRITICAL"
  },
  "details": "Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds.\n\nPerl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer.\n\nA caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.",
  "id": "GHSA-mpxq-89h3-qc47",
  "modified": "2026-05-27T21:31:19Z",
  "published": "2026-05-26T13:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8376"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Perl/perl5/commit/5e7f119eb2bb1181be908701f22bf7068e722f1c.patch"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/26/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-8376

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-06-28 14:15

Summary

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-8376

CWE-680 - Integer Overflow to Buffer Overflow

Affected products

Fixed 2 products

Product	Identifier	Version	Remediation
Unresolved product id: 20313-17084		—
Unresolved product id: 21504-17084		—

Known affected 2 products

Product	Identifier	Version	Remediation
Unresolved product id: 17084-2		—	Vendor Fix fix
Unresolved product id: 17084-1		—	Vendor Fix fix

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-8376 Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-8376.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds",
    "tracking": {
      "current_release_date": "2026-06-28T14:15:08.000Z",
      "generator": {
        "date": "2026-06-29T07:25:26.168Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-8376",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
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          "date": "2026-05-27T01:01:43.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-05-27T14:40:45.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        },
        {
          "date": "2026-06-19T01:40:20.000Z",
          "legacy_version": "3",
          "number": "3",
          "summary": "Information published."
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        {
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          "legacy_version": "4",
          "number": "4",
          "summary": "Information published."
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      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
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            "name": "Azure Linux"
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                "name": "\u003cazl3 perl 0:5.38.2-509.azl3",
                "product": {
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                  "product_id": "2"
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              {
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                "product": {
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                }
              },
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                "name": "\u003cazl3 perl 0:5.38.2-512.azl3",
                "product": {
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                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "azl3 perl 0:5.38.2-512.azl3",
                "product": {
                  "name": "azl3 perl 0:5.38.2-512.azl3",
                  "product_id": "21504"
                }
              }
            ],
            "category": "product_name",
            "name": "perl"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
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        "full_product_name": {
          "name": "\u003cazl3 perl 0:5.38.2-509.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      },
      {
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        "relates_to_product_reference": "17084"
      },
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        "relates_to_product_reference": "17084"
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      {
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          "product_id": "21504-17084"
        },
        "product_reference": "21504",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-8376",
      "cwe": {
        "id": "CWE-680",
        "name": "Integer Overflow to Buffer Overflow"
      },
      "notes": [
        {
          "category": "general",
          "text": "CPANSec",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "20313-17084",
          "21504-17084"
        ],
        "known_affected": [
          "17084-2",
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-8376 Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-8376.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-05-27T01:01:43.000Z",
          "details": "0:5.38.2-511.azl3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17084-2"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        },
        {
          "category": "vendor_fix",
          "date": "2026-05-27T01:01:43.000Z",
          "details": "0:5.38.2-512.azl3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17084-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "title": "Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds"
    }
  ]
}

ubuntu-cve-2026-8376

Vulnerability from osv_ubuntu

Published

2026-05-26 00:16

Modified

2026-07-01 16:29

Summary

Details

Severity

9.8 (Critical)


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

7.3 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-8376	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-8376	REPORT
	https://github.com/Perl/perl5/pull/24433	REPORT
	https://ubuntu.com/security/notices/USN-8467-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libcgi-fast-perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "libperl5.18",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "perl-modules",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.18.2-2ubuntu1.7+esm7?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.18.2-2ubuntu1.7+esm7"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libperl5.26",
            "binary_version": "5.26.1-6ubuntu0.7+esm2"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.26.1-6ubuntu0.7+esm2"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.26.1-6ubuntu0.7+esm2"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.26.1-6ubuntu0.7+esm2"
          },
          {
            "binary_name": "perl-modules-5.26",
            "binary_version": "5.26.1-6ubuntu0.7+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.26.1-6ubuntu0.7+esm2?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.26.1-6ubuntu0.7+esm2"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libperl5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm2"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.30.0-9ubuntu0.5+esm2"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.30.0-9ubuntu0.5+esm2"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.30.0-9ubuntu0.5+esm2"
          },
          {
            "binary_name": "perl-modules-5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.30.0-9ubuntu0.5+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
              "fixed": "5.30.0-9ubuntu0.5+esm2"
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          ],
          "type": "ECOSYSTEM"
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      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libperl5.34",
            "binary_version": "5.34.0-3ubuntu1.7"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.34.0-3ubuntu1.7"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.34.0-3ubuntu1.7"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.34.0-3ubuntu1.7"
          },
          {
            "binary_name": "perl-modules-5.34",
            "binary_version": "5.34.0-3ubuntu1.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.34.0-3ubuntu1.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.34.0-3ubuntu1.7"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libperl5.38t64",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl-modules-5.38",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.38.2-3.2ubuntu0.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.38.2-3.2ubuntu0.3"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "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"
            },
            {
              "fixed": "5.40.1-6ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.40.1-2",
        "5.40.1-3",
        "5.40.1-5",
        "5.40.1-6",
        "5.40.1-6build1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libperl5.40",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl-modules-5.40",
            "binary_version": "5.40.1-7ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.40.1-7ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.40.1-7ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.40.1-6build1",
        "5.40.1-7build1"
      ]
    }
  ],
  "aliases": [],
  "details": "Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.",
  "id": "UBUNTU-CVE-2026-8376",
  "modified": "2026-07-01T16:29:34Z",
  "published": "2026-05-26T00:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-8376"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-8376"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Perl/perl5/pull/24433"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8467-1"
    }
  ],
  "related": [
    "USN-8467-1"
  ],
  "schema_version": "1.7.0",
  "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:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-8376"
  ]
}

WID-SEC-W-2026-1663

Vulnerability from csaf_certbund - Published: 2026-05-25 22:00 - Updated: 2026-06-08 22:00

Summary

Perl: Schwachstelle ermöglicht nicht spezifizierten Angriff

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Perl ist eine freie, plattformunabhängige und interpretierte Programmiersprache (Skriptsprache).

Angriff: Ein Angreifer kann eine Schwachstelle in Perl ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2026-8376

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Amazon Linux 2 Amazon	`cpe:/o:amazon:linux_2:-`	—

Last affected 1 product

Product	Identifier	Version	Remediation
Open Source Perl <=5.43.10 Open Source / Perl		<=5.43.10

References

6 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://seclists.org/oss-sec/2026/q2/698	external
https://github.com/Perl/perl5/commit/5e7f119eb2bb…	external
https://euvd.enisa.europa.eu/enisa/EUVD-2026-31772	external
https://alas.aws.amazon.com/AL2/ALAS2-2026-3352.html	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Perl ist eine freie, plattformunabh\u00e4ngige und interpretierte Programmiersprache (Skriptsprache).",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann eine Schwachstelle in Perl ausnutzen, um einen nicht n\u00e4her spezifizierten Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1663 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1663.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1663 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1663"
      },
      {
        "category": "external",
        "summary": "oss-sec mailing list vom 2026-05-25",
        "url": "https://seclists.org/oss-sec/2026/q2/698"
      },
      {
        "category": "external",
        "summary": "Github Patch vom 2026-05-25",
        "url": "https://github.com/Perl/perl5/commit/5e7f119eb2bb1181be908701f22bf7068e722f1c.patch"
      },
      {
        "category": "external",
        "summary": "EUVD Security Advisory vom 2026-05-25",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-31772"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2-2026-3352 vom 2026-06-09",
        "url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3352.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Perl: Schwachstelle erm\u00f6glicht nicht spezifizierten Angriff",
    "tracking": {
      "current_release_date": "2026-06-08T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-09T08:42:01.323+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1663",
      "initial_release_date": "2026-05-25T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-25T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-08T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Amazon aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=5.43.10",
                "product": {
                  "name": "Open Source Perl \u003c=5.43.10",
                  "product_id": "T054652"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c=5.43.10",
                "product": {
                  "name": "Open Source Perl \u003c=5.43.10",
                  "product_id": "T054652-fixed"
                }
              }
            ],
            "category": "product_name",
            "name": "Perl"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-8376",
      "product_status": {
        "known_affected": [
          "398363"
        ],
        "last_affected": [
          "T054652"
        ]
      },
      "release_date": "2026-05-25T22:00:00.000+00:00",
      "title": "CVE-2026-8376"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-8376 (GCVE-0-2026-8376)

FKIE_CVE-2026-8376

GHSA-MPXQ-89H3-QC47

MSRC_CVE-2026-8376

ubuntu-cve-2026-8376

Vulnerability from osv_ubuntu

WID-SEC-W-2026-1663

Tags

Sightings

Nomenclature