CVE-2021-41498

Pyo Buffer Overflow Vulnerability

7.5 HighFix available

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.23%Up 0.8 points since Dec 20, 2021

What each source reports

NVD Score used 7.5

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: CVE-2021-41498
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-120
Updated: 2026-11-02

CVE List No score

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: CVE-2021-41498
Updated: 2026-11-02

EUVDEUVD-2021-0475 No score

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: EUVD-2021-0475
Updated: 2026-11-03

GitHub AdvisoriesGHSA-qj27-32wp-ghrg 8.7

Pyo Buffer Overflow Vulnerability

Buffer overflow in ajaxsoundstudio.com Pyo <= 1.03 in the Server_jack_init function which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong client_name.

Record: GHSA-qj27-32wp-ghrg
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

OSV 7.5

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: CVE-2021-41498
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-41498 7.5

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: DEBIAN-CVE-2021-41498
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVGHSA-qj27-32wp-ghrg 8.7

Pyo Buffer Overflow Vulnerability

Buffer overflow in ajaxsoundstudio.com Pyo <= 1.03 in the Server_jack_init function which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong client_name.

Record: GHSA-qj27-32wp-ghrg
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

OSVPYSEC-2021-890 7.5

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: PYSEC-2021-890
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-41498 7.5

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

Record: UBUNTU-CVE-2021-41498
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

pyo project pyo

Affected packages

Affected packages
Package	Affected	Fixed
`pyo` PyPI	before 1.0.4	1.0.4
`python-pyo` Debian:12	before 1.0.4-1	1.0.4-1
`python-pyo` Debian:13	before 1.0.4-1	1.0.4-1
`python-pyo` Debian:14	before 1.0.4-1	1.0.4-1
`pyo` PyPI	before 1.0.4, plus listed versions 1.0.01.0.11.0.21.0.3	1.0.4
`python-pyo` Ubuntu:16.04:LTS	All versions, plus listed versions 0.7.6-10.7.6+git20150902.a1d7123d76-10.7.8-10.7.8+git20160129-1	None known
`python-pyo` Ubuntu:18.04:LTS	All versions, plus listed versions 0.8.6-1build20.8.7-10.8.8-1	None known
`python-pyo` Ubuntu:20.04:LTS	All versions, plus listed versions 0.9.1-10.9.1-1build11.0.0-21.0.0-2.11.0.0-2.1build1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-41498 is a high vulnerability (CVSS 7.5) in Pyo Project Pyo, published December 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.23%, the 69th percentile. Fixed in pyo 1.0.4.

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

In short

References