Vulnerability-Lookup

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"
    }
  ]
}

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

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-26T03:06:00.816Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/26/1"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-8376",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T18:03:45.554441Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-27T18:04:00.329Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "perl",
          "product": "perl",
          "programFiles": [
            "regcomp_study.c"
          ],
          "programRoutines": [
            {
              "name": "Perl_study_chunk"
            }
          ],
          "repo": "https://github.com/Perl/perl5",
          "vendor": "SHAY",
          "versions": [
            {
              "lessThanOrEqual": "5.43.10",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-680",
              "description": "CWE-680 Integer Overflow to Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-25T23:53:27.812Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/Perl/perl5/commit/5e7f119eb2bb1181be908701f22bf7068e722f1c.patch"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to a future perl release, or apply the upstream patch."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-04-24T00:00:00.000Z",
          "value": "Issue reported."
        },
        {
          "lang": "en",
          "time": "2026-05-20T00:00:00.000Z",
          "value": "Fix merged to blead."
        }
      ],
      "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",
      "workarounds": [
        {
          "lang": "en",
          "value": "On 32-bit perl builds, avoid compiling regular expressions from untrusted input until a fixed release is installed."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-8376",
    "datePublished": "2026-05-25T23:53:27.812Z",
    "dateReserved": "2026-05-12T08:15:41.456Z",
    "dateUpdated": "2026-05-27T18:04:00.329Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2026-1663

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

Tags

Sightings

Nomenclature