Vulnerability-Lookup

UBUNTU-CVE-2026-86145 (CVE-2026-86145)

Vulnerability from osv_ubuntu – Published: 2026-09-05 06:17 – Updated: 2026-10-17 09:54 – Source website

Details

PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Severity

8.2 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-86145	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-86145	REPORT
	https://github.com/PCRE2Project/pcre2/security/ad…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpcre2-16-0",
            "binary_version": "10.34-7ubuntu0.1"
          },
          {
            "binary_name": "libpcre2-32-0",
            "binary_version": "10.34-7ubuntu0.1"
          },
          {
            "binary_name": "libpcre2-8-0",
            "binary_version": "10.34-7ubuntu0.1"
          },
          {
            "binary_name": "libpcre2-posix2",
            "binary_version": "10.34-7ubuntu0.1"
          },
          {
            "binary_name": "pcre2-utils",
            "binary_version": "10.34-7ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "pcre2",
        "purl": "pkg:deb/ubuntu/pcre2@10.34-7ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.32-5",
        "10.34-7",
        "10.34-7ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpcre2-16-0",
            "binary_version": "10.39-3ubuntu0.1"
          },
          {
            "binary_name": "libpcre2-32-0",
            "binary_version": "10.39-3ubuntu0.1"
          },
          {
            "binary_name": "libpcre2-8-0",
            "binary_version": "10.39-3ubuntu0.1"
          },
          {
            "binary_name": "libpcre2-posix3",
            "binary_version": "10.39-3ubuntu0.1"
          },
          {
            "binary_name": "pcre2-utils",
            "binary_version": "10.39-3ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "pcre2",
        "purl": "pkg:deb/ubuntu/pcre2@10.39-3ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.37-0ubuntu2",
        "10.39-3",
        "10.39-3build1",
        "10.39-3ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpcre2-16-0",
            "binary_version": "10.42-4ubuntu2.1"
          },
          {
            "binary_name": "libpcre2-32-0",
            "binary_version": "10.42-4ubuntu2.1"
          },
          {
            "binary_name": "libpcre2-8-0",
            "binary_version": "10.42-4ubuntu2.1"
          },
          {
            "binary_name": "libpcre2-posix3",
            "binary_version": "10.42-4ubuntu2.1"
          },
          {
            "binary_name": "pcre2-utils",
            "binary_version": "10.42-4ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "pcre2",
        "purl": "pkg:deb/ubuntu/pcre2@10.42-4ubuntu2.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.42-4",
        "10.42-4ubuntu1",
        "10.42-4ubuntu2",
        "10.42-4ubuntu2.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpcre2-16-0",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "libpcre2-32-0",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "libpcre2-8-0",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "libpcre2-posix3",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "pcre2-utils",
            "binary_version": "10.46-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "pcre2",
        "purl": "pkg:deb/ubuntu/pcre2@10.46-1build1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.46-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpcre2-16-0",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "libpcre2-32-0",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "libpcre2-8-0",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "libpcre2-posix3",
            "binary_version": "10.46-1build1"
          },
          {
            "binary_name": "pcre2-utils",
            "binary_version": "10.46-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "pcre2",
        "purl": "pkg:deb/ubuntu/pcre2@10.46-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.46-1",
        "10.46-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).",
  "id": "UBUNTU-CVE-2026-86145",
  "modified": "2026-10-17T09:54:14Z",
  "published": "2026-09-05T06:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-86145"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-86145"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-86145"
  ]
}

CVE-2026-86145 (GCVE-0-2026-86145)

Vulnerability from cvelistv5 – Published: 2026-09-05 05:09 – Updated: 2026-09-08 18:07

Summary

Severity

8.2 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:07 UTC

CWE

CWE-424 - Improper Protection of Alternate Path

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2319 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/PCRE2Project/pcre2/security/ad…
https://github.com/PCRE2Project/pcre2/releases/ta…
http://www.openwall.com/lists/oss-security/2026/09/05/3

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 10.32 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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      {
        "metrics": [
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              "content": {
                "id": "CVE-2026-86145",
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                    "Exploitation": "none"
                  },
                  {
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                ],
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              "cpeMatch": [
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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.

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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.

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