Vulnerability · Published Aug 25, 2026 · Assigned by mitre
CVE-2026-75421
Medium 4.0
In plain English
A medium-severity stack buffer overflow in the aria2 package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).
Severity (CVSS 3.1)4.0Medium
Exploit odds (30 days)0.2%top 95.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
aria2 <=1.37.0 has a stack-buffer-underflow vulnerability in the IOFile::getLine() function.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | aria2 | no fix listed | DEBIAN-CVE-2026-75421 |
| Debian:13 | aria2 | no fix listed | DEBIAN-CVE-2026-75421 |
| Debian:14 | aria2 | no fix listed | DEBIAN-CVE-2026-75421 |
| Ubuntu:22.04:LTS | aria2 | no fix listed | UBUNTU-CVE-2026-75421 |
| Ubuntu:24.04:LTS | aria2 | no fix listed | UBUNTU-CVE-2026-75421 |
| Ubuntu:26.04:LTS | aria2 | no fix listed | UBUNTU-CVE-2026-75421 |
| Ubuntu:26.10 | aria2 | no fix listed | UBUNTU-CVE-2026-75421 |
Affected products (as reported)
Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L