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aria2 — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-75421

aria2 <=1.37.0 has a stack-buffer-underflow vulnerability in the IOFile::getLine() function.

Products
aria2
Affected versions
1.17.0-1, 1.18.0-1, 1.18.0-1ubuntu2, 1.18.0-2, 1.18.1-1, 1.18.1-1ubuntu0.1~esm1, 1.19.0-1, 1.19.0-1build1, 1.19.0-1ubuntu0.1~esm1, 1.32.0-1, 1.32.0-2, 1.33.1-1, 1.33.1-1ubuntu0.1~esm1, 1.34.0-4, 1.35.0-1, 1.35.0-1build1, 1.35.0-3, 1.36.0-1, 1.36.0-2, 1.37.0+debian-1, 1.37.0+debian-1build1, 1.37.0+debian-1build2, 1.37.0+debian-1build3, 1.37.0+debian-3build1, 1.37.0+debian-4
Fixed versions
Not specified
CVEs
CVE-2026-75421
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 03:17 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-75421

core-osv · Original source

Published 25 Aug 2026, 21:17 UTC

aria2 <=1.37.0 has a stack-buffer-underflow vulnerability in the IOFile::getLine() function.

osv:UBUNTU-CVE-2026-75421

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

aria2

Fixed versions: Not specified

Complete source record
{
  "id": "d03f4a4bef1311f65e32595ba2ab6c4639f0303344438d8a7bd3f75f28b479f9",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-75421",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-75421",
    "summary": "aria2 <=1.37.0 has a stack-buffer-underflow vulnerability in the IOFile::getLine() function.",
    "evidence": "osv:UBUNTU-CVE-2026-75421",
    "products": [
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.17.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.18.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.18.0-1ubuntu2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.18.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.18.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.18.1-1ubuntu0.1~esm1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.19.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.19.0-1build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.19.0-1ubuntu0.1~esm1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.32.0-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.32.0-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.33.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.33.1-1ubuntu0.1~esm1",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.34.0-4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.35.0-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.35.0-1build1",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.35.0-3",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.36.0-1",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.36.0-2",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.37.0+debian-1",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.37.0+debian-1build1",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.37.0+debian-1build2",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.37.0+debian-1build3",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.37.0+debian-4",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "aria2",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.37.0+debian-3build1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.37.0+debian-4",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-75421",
      "aliases": [
        "UBUNTU-CVE-2026-75421"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=esm-infra-legacy%2Ftrusty",
            "ecosystem": "Ubuntu:Pro:14.04:LTS"
          },
          "versions": [
            "1.17.0-1",
            "1.18.0-1",
            "1.18.0-1ubuntu2",
            "1.18.0-2",
            "1.18.1-1",
            "1.18.1-1ubuntu0.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.18.1-1ubuntu0.1~esm1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=esm-apps%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
          "versions": [
            "1.19.0-1",
            "1.19.0-1build1",
            "1.19.0-1ubuntu0.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.19.0-1ubuntu0.1~esm1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=esm-apps%2Fbionic",
            "ecosystem": "Ubuntu:Pro:18.04:LTS"
          },
          "versions": [
            "1.32.0-1",
            "1.32.0-2",
            "1.33.1-1",
            "1.33.1-1ubuntu0.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.33.1-1ubuntu0.1~esm1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "1.34.0-4",
            "1.35.0-1",
            "1.35.0-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.35.0-1build1"
              },
              {
                "binary_name": "libaria2-0",
                "binary_version": "1.35.0-1build1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "1.35.0-3",
            "1.36.0-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.36.0-1"
              },
              {
                "binary_name": "libaria2-0",
                "binary_version": "1.36.0-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "1.36.0-2",
            "1.37.0+debian-1",
            "1.37.0+debian-1build1",
            "1.37.0+debian-1build2",
            "1.37.0+debian-1build3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.37.0+debian-1build3"
              },
              {
                "binary_name": "libaria2-0",
                "binary_version": "1.37.0+debian-1build3"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "1.37.0+debian-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.37.0+debian-4"
              },
              {
                "binary_name": "libaria2-0",
                "binary_version": "1.37.0+debian-4"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "aria2",
            "purl": "pkg:deb/ubuntu/aria2?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "1.37.0+debian-3build1",
            "1.37.0+debian-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75421.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "aria2",
                "binary_version": "1.37.0+debian-4"
              },
              {
                "binary_name": "libaria2-0",
                "binary_version": "1.37.0+debian-4"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T13:01:05.708261018Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-75421"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-75421",
        "https://www.cve.org/CVERecord?id=CVE-2026-75421",
        "https://github.com/aria2/aria2/issues/2375",
        "https://github.com/aria2/aria2/pull/2376"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-75421",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 360960,
  "published_at": "2026-08-25T21:17:00+00:00"
}