CVE-2021-23159

Exp

A vulnerability was found in SoX, where a heap-buffer-overflow occurs in function lsx_read_w_buf() in formats_i.c file. The vulnerability is exploitable with a crafted file, that could cause an application to crash.

Published: 2022-08-25 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-23159 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.46%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-23159

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-23159

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.17% 0.46% +0.29%
2 2026-05-27 0.03% 0.17% +0.14%
3 2025-11-21 — 0.03% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-23159

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]

Weakness enumeration for CVE-2021-23159

OS Trackers for CVE-2021-23159

vendor priority summary link
alpine — CVE-2021-23159: 1 source package rows (sox); 6 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 6, open 0. https://security.alpinelinux.org/vuln/CVE-2021-23159
debian not yet assigned CVE-2021-23159 not yet assigned priority: Debian including 1 source packages (sox), 3 status rows across 3 suites (bookworm, bullseye, trixie): resolved 3. https://security-tracker.debian.org/tracker/CVE-2021-23159
redhat low — https://access.redhat.com/security/cve/CVE-2021-23159
suse low CVE-2021-23159 severity low: SUSE including 9 source package names (libsox3-14.4.2-8.1, libsox3-14.4.2-bp154.2.3.1, …), 15 product×package rows across 5 product lines (SUSE Package Hub 15 SP4, SUSE Package Hub 15 SP5, … (5 product lines)): Fixed 15. https://www.suse.com/security/cve/CVE-2021-23159/
ubuntu medium CVE-2021-23159 medium priority: Ubuntu including 1 source packages (sox), 12 status rows across 12 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): released 7, ignored 3, not-affected 2. https://ubuntu.com/security/CVE-2021-23159

Affected software / configurations for CVE-2021-23159

Vendor Product Version Raw CPE
sound_exchange_project sound_exchange 14.4.2-7 cpe:2.3:a:sound_exchange_project:sound_exchange:14.4.2-7:*:*:*:*:*:*:*

References for CVE-2021-23159

cvelogic Threat Intelligence