Stack Buffer Underflow in aria2 <=1.37.0

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: MITRE

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-25

Last Modified

2026-08-25

Generated

2026-08-26

AI Q&A

2026-08-26

EPSS Evaluated

N/A

NVD

CVE-2026-75421

Affected Vendors & Products

Vendor	Product	Version / Range
aria2	aria2	to 1.37.0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

aria2 versions up to 1.37.0 contain a stack-buffer-underflow flaw in the IOFile::getLine() function. This occurs when the function reads input beyond the allocated buffer size, potentially corrupting adjacent memory.

Impact Analysis

An attacker could exploit this to crash the application or execute arbitrary code, leading to denial of service or unauthorized system access. Users running vulnerable versions should update immediately.

Mitigation Strategies

Upgrade aria2 to a version higher than 1.37.0 to address the stack-buffer-underflow vulnerability in IOFile::getLine().

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