How severe is CVE-2021-3643?

CVE-2021-3643 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2021-3643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3643?

CVE-2021-3643 affects Sound Exchange Project Sound Exchange. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3643?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-3643 published?

CVE-2021-3643 was published on 2022-05-02 and last updated on 2026-06-17.

CVE-2021-3643

CVE-2021-3643 is a critical-severity vulnerability in Sound Exchange Project Sound Exchange with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Sound Exchange Project Sound Exchange
Published: 2022-05-02
Last modified: 2026-06-17

Description

A flaw was found in sox 14.4.1. The lsx_adpcm_init function within libsox leads to a global-buffer-overflow. This flaw allows an attacker to input a malicious file, leading to the disclosure of sensitive information.

Frequently asked questions

What is CVE-2021-3643?: A flaw was found in sox 14.4.1. The lsx_adpcm_init function within libsox leads to a global-buffer-overflow. This flaw allows an attacker to input a malicious file, leading to the disclosure of sensitive information.
How severe is CVE-2021-3643?: CVE-2021-3643 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2021-3643 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3643?: CVE-2021-3643 affects Sound Exchange Project Sound Exchange. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3643?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-3643 published?: CVE-2021-3643 was published on 2022-05-02 and last updated on 2026-06-17.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1980626

Affected products (1)

cpe:2.3:a:sound_exchange_project:sound_exchange:14.4.1:*:*:*:*:*:*:*

More vulnerabilities in Sound Exchange Project Sound Exchange

CVE-2021-40426 — High (CVSS 8.8): A heap-based buffer overflow vulnerability exists in the sphere.c start_read() functionality of Sound Exchange libsox…
CVE-2023-34432 — High (CVSS 7.8): A heap buffer overflow vulnerability was found in sox, in the lsx_readbuf function at sox/src/formats_i.c:98:16. This…
CVE-2023-34318 — High (CVSS 7.8): A heap buffer overflow vulnerability was found in sox, in the startread function at sox/src/hcom.c:160:41. This flaw…
CVE-2017-18189 — High (CVSS 7.5): In the startread function in xa.c in Sound eXchange (SoX) through 14.4.2, a corrupt header specifying zero channels…
CVE-2014-8145 — High (CVSS 7.5): Multiple heap-based buffer overflows in Sound eXchange (SoX) 14.4.1 and earlier allow remote attackers to have…
CVE-2023-32627 — Medium (CVSS 6.2): A floating point exception vulnerability was found in sox, in the read_samples function at sox/src/voc.c:334:18. This…

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