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cflow — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2025-8735

A vulnerability classified as problematic was found in GNU cflow up to 1.8. Affected by this vulnerability is the function yylex of the file c.c of the component Lexer. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.

Products
cflow
Affected versions
1:1.4+dfsg1-3ubuntu1, 1:1.4+dfsg1-3ubuntu1.16.04.1~esm1, 1:1.4+dfsg1-3ubuntu1.18.04.1~esm1, 1:1.6-4, 1:1.6-6, 1:1.7-2, 1:1.7-4, 1:1.7-5, 1:1.8-1, 1:1.8-1build1
Fixed versions
Not specified
CVEs
CVE-2025-8735
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 02:52 UTC · Revision 1

Source evidence

UBUNTU-CVE-2025-8735

core-osv · Original source

Published 8 Aug 2025, 19:15 UTC

A vulnerability classified as problematic was found in GNU cflow up to 1.8. Affected by this vulnerability is the function yylex of the file c.c of the component Lexer. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.

osv:UBUNTU-CVE-2025-8735

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

cflow

Fixed versions: Not specified

Complete source record
{
  "id": "7124b2dc9bca0f31a1000ac868038b81652aa14402c8580f688ef015a7e3b5fd",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-8735",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2025-8735",
    "summary": "A vulnerability classified as problematic was found in GNU cflow up to 1.8. Affected by this vulnerability is the function yylex of the file c.c of the component Lexer. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.",
    "evidence": "osv:UBUNTU-CVE-2025-8735",
    "products": [
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.4+dfsg1-3ubuntu1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1:1.4+dfsg1-3ubuntu1.16.04.1~esm1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.4+dfsg1-3ubuntu1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1:1.4+dfsg1-3ubuntu1.18.04.1~esm1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.6-4",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.6-4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1:1.6-6",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1:1.7-2",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.7-4",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1:1.7-5",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.7-5",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1:1.8-1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.8-1build1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cflow",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:1.8-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:1.8-1build1",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "low",
    "structured": {
      "id": "UBUNTU-CVE-2025-8735",
      "aliases": [
        "UBUNTU-CVE-2025-8735"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        },
        {
          "type": "Ubuntu",
          "score": "low"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=esm-apps%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
          "versions": [
            "1:1.4+dfsg1-3ubuntu1",
            "1:1.4+dfsg1-3ubuntu1.16.04.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.4+dfsg1-3ubuntu1.16.04.1~esm1"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=esm-apps%2Fbionic",
            "ecosystem": "Ubuntu:Pro:18.04:LTS"
          },
          "versions": [
            "1:1.4+dfsg1-3ubuntu1",
            "1:1.4+dfsg1-3ubuntu1.18.04.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.4+dfsg1-3ubuntu1.18.04.1~esm1"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "1:1.6-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.6-4"
              },
              {
                "binary_name": "cflow-l10n",
                "binary_version": "1:1.6-4"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "1:1.6-4",
            "1:1.6-6",
            "1:1.7-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.7-2"
              },
              {
                "binary_name": "cflow-l10n",
                "binary_version": "1:1.7-2"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "1:1.7-4",
            "1:1.7-5"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.7-5"
              },
              {
                "binary_name": "cflow-l10n",
                "binary_version": "1:1.7-5"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
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            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "1:1.7-5",
            "1:1.8-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.8-1"
              },
              {
                "binary_name": "cflow-l10n",
                "binary_version": "1:1.8-1"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
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            "name": "cflow",
            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
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            "1:1.8-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.8-1build1"
              },
              {
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                "binary_version": "1:1.8-1build1"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
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            "purl": "pkg:deb/ubuntu/cflow?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
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            "1:1.8-1",
            "1:1.8-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-8735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "cflow",
                "binary_version": "1:1.8-1build1"
              },
              {
                "binary_name": "cflow-l10n",
                "binary_version": "1:1.8-1build1"
              }
            ],
            "priority_reason": "attack on the localhost"
          }
        }
      ],
      "modified": "2026-10-17T12:59:37.502198973Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-8735"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2025-8735",
        "https://www.cve.org/CVERecord?id=CVE-2025-8735",
        "https://lists.gnu.org/archive/html/bug-cflow/2025-07/msg00000.html",
        "https://drive.google.com/file/d/1Q_rDQSEl3cBu6SUbfqr9pV9cHgvKcXFI/view?usp=drive_link",
        "https://vuldb.com/?ctiid.319231",
        "https://vuldb.com/?id.319231",
        "https://vuldb.com/?submit.622328",
        "https://www.gnu.org/"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-8735",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 359691,
  "published_at": "2025-08-08T19:15:00+00:00"
}