EUVD-2026-65117
GHSA-f585-rhpf-c5rw
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
BitTorrent peer data is network-sourced; AV:N better reflects the remote-attacker threat described, with no auth or interaction needed to crash the process.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
3DescriptionCVE.org
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
AnalysisAI
Divide-by-zero in Aria2's BitTorrent helper module (src/bittorrent_helper.cc) crashes the download utility when processing malformed BitTorrent data, resulting in denial of service. Aria2 1.37.0 and all prior versions are affected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability is triggered only when aria2 processes BitTorrent protocol data - it is not reachable through aria2's HTTP, FTP, SFTP, or Metalink download paths. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 6.2 with vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H presents an internal conflict that analysts must resolve before acting: the NVD-assigned attack vector is Local (AV:L), yet the CVE description explicitly attributes the attack to a 'remote malicious user.' This discrepancy is significant - if AV:L is correct, exploitation requires local file delivery (e.g., a crafted .torrent file opened by the user), substantially limiting attacker reach; if the description is accurate and the vector should be AV:N, the score would rise to approximately 7.5 and the exposure surface would expand to any aria2 instance connected to a malicious BitTorrent peer. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched version has been confirmed at time of analysis; the sole public reference is the open GitHub issue at https://github.com/aria2/aria2/issues/2371, which does not yet document a fix commit or tagged release. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-369 – Divide By Zero
View allSame technique Denial Of Service
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External POC / Exploit Code
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