Security readout for executives and security teams
CVE-2021-40426 is a critical memory corruption flaw in Sound eXchange libsox. A malicious audio file can trigger a heap buffer overflow when processed. Business risk is highest where services automatically accept, convert, scan, or analyze untrusted audio files. Systems are most exposed if SoX/libsox processes untrusted or user-supplied audio, especially automated upload, transcoding, media pipeline, forensic, or archival workflows. Exposure is lower where SoX is absent or only handles trusted local files. Treat this as urgent where audio uploads or automated conversion exist. Prioritize patching internet-facing or customer-facing media workflows first, then internal batch processing systems that handle files from external parties. Mitigation focus: Inventory systems and applications that package or link Sound eXchange libsox.; Update SoX/libsox using Debian or other vendor security guidance.; For source builds, review upstream or vendor patches referenced by advisories..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-122: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-40426 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
10CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1434CVE reference
- [debian-lts-announce] 20230210 [SECURITY] [DLA 3315-1] sox security updateCVE reference · mailing-list
- DSA-5356CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.