Medium
aria2 — security advisory
Aria2 version 1.37.0 and below is affected by a Divide By Zero issue in src/bittorrent_helper.cc, which allows a remote malicious user to cause a Denial of Service
- 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-2026-71832
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:15 UTC · Revision 1
Source evidence
Aria2 version 1.37.0 and below is affected by a Divide By Zero issue in src/bittorrent_helper.cc, which allows a remote malicious user to cause a Denial of Service
osv:UBUNTU-CVE-2026-71832
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": "ac5f5dd92d2674ea75a04c54d85925800646f46a36a275ca334f35bb9f6c931a",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-71832",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-71832",
"summary": "Aria2 version 1.37.0 and below is affected by a Divide By Zero issue in src/bittorrent_helper.cc, which allows a remote malicious user to cause a Denial of Service",
"evidence": "osv:UBUNTU-CVE-2026-71832",
"products": [
{
"name": {
"value": "aria2",
"evidence": "/affected/0/package/name"
},
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"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": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"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": {
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"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": {
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"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-2026-71832",
"aliases": [
"UBUNTU-CVE-2026-71832"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"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-2026-71832.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-2026-71832.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-2026-71832.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-2026-71832.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-2026-71832.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aria2",
"binary_version": "1.36.0-1"
},
{
"binary_name": "libaria2-0",
"binary_version": "1.36.0-1"
}
]
}
},
{
"ranges": [
{
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}
]
}
],
"package": {
"name": "aria2",
"purl": "pkg:deb/ubuntu/aria2?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
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"1.37.0+debian-1",
"1.37.0+debian-1build1",
"1.37.0+debian-1build2",
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],
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},
"ecosystem_specific": {
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{
"binary_name": "aria2",
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},
{
"binary_name": "libaria2-0",
"binary_version": "1.37.0+debian-1build3"
}
]
}
},
{
"ranges": [
{
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"package": {
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"ecosystem": "Ubuntu:26.10"
},
"versions": [
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],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aria2",
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},
{
"binary_name": "libaria2-0",
"binary_version": "1.37.0+debian-4"
}
]
}
},
{
"ranges": [
{
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{
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}
],
"package": {
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"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-2026-71832.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": "2026-10-17T13:00:47.975013445Z",
"provider": "osv",
"upstream": [
"CVE-2026-71832"
],
"references": [
"https://ubuntu.com/security/CVE-2026-71832",
"https://www.cve.org/CVERecord?id=CVE-2026-71832",
"https://github.com/aria2/aria2/issues/2371"
]
},
"related_cves": [
{
"value": "CVE-2026-71832",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360846,
"published_at": "2026-08-24T19:16:00+00:00"
}