CVE & CISA-KEV Catalog

CVE-2021-40426

HIGHEPSS 80th pctl
8.8
CVSS v3
NVD

Description

A heap-based buffer overflow vulnerability exists in the sphere.c start_read() functionality of Sound Exchange libsox 14.4.2 and master commit 42b3557e. A specially-crafted file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

CWE-122Heap-based Buffer OverflowCWE-787Out-of-bounds Write

How to fix

Remediation Available
soxDebian
Fixed in:14.4.2+git20190427-2+deb11u1CVE-2021-40426
Fixed in:14.4.2+git20190427-3.1CVE-2021-40426
Fixed in:14.4.2+git20190427-3.1CVE-2021-40426
libsox2Ubuntu
Fixed in:14.4.1-3ubuntu1.1+esm2USN-5904-1
Fixed in:14.4.1-5+deb8u4ubuntu0.1+esm1USN-5904-1
libsox3Ubuntu
Fixed in:14.4.2-3ubuntu0.18.04.2USN-5904-1
Fixed in:14.4.2+git20190427-2+deb11u1build0.20.04.1USN-5904-1
Fixed in:14.4.2+git20190427-2+deb11u1build0.22.04.1USN-5904-1
Fixed in:14.4.2+git20190427-3ubuntu0.1USN-5904-1
soxUbuntu
Fixed in:14.4.1-3ubuntu1.1+esm2USN-5904-1
Fixed in:14.4.1-5+deb8u4ubuntu0.1+esm1USN-5904-1
Fixed in:14.4.2-3ubuntu0.18.04.2USN-5904-1
Fixed in:14.4.2+git20190427-2+deb11u1build0.20.04.1USN-5904-1
Fixed in:14.4.2+git20190427-2+deb11u1build0.22.04.1USN-5904-1
Fixed in:14.4.2+git20190427-3ubuntu0.1USN-5904-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

2.21%probability of exploitation in 30 days
80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2015-3113Critical9.8100%KEVFix
CVE-2024-26256High7.888%-Fix
CVE-2020-25687Medium5.987%-Fix
CVE-2009-3459High8.886%KEVFix
CVE-2021-21017High8.886%KEV-
CVE-2020-25683Medium5.986%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-06-24.