CVE-2026-32836

dr_libs dr_flac.h version 0.13.3 and earlier (fixed in commits fefced4, 4f5a4cd, and 663239a) contain an uncontrolled memory allocation vulnerability in drflac__read_and_decode_metadata() that allows attackers to trigger excessive memory allocation by supplying crafted PICTURE metadata blocks. Attackers can exploit attacker-controlled mimeLength and descriptionLength fields to cause denial of service through memory exhaustion when processing FLAC streams with metadata callbacks.

CVSS v3 6.2 MEDIUM

6.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.5 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/mackron/dr_libs/commit/4f5a4cd3b57564d969443c580c75857e039f100a
https://github.com/mackron/dr_libs/commit/663239a3d0460c33bd5b6e5166edcb404e3df676
https://github.com/mackron/dr_libs/commit/fefced4a64adfb1a68a2d31d882366e56096dee8
https://github.com/mackron/dr_libs/issues/298	Exploit Issue Tracking Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/mackron-dr-libs-excessive-memory-allocation-in-picture-metadata-parsing	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mackron:dr_libs:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-17 20:16

Updated : 2026-07-14 19:16

NVD link : CVE-2026-32836

Mitre link : CVE-2026-32836

CVE.ORG link : CVE-2026-32836

JSON object : View

Products Affected

mackron

dr_libs

CWE

CWE-789

Memory Allocation with Excessive Size Value

{"id": "CVE-2026-32836", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32836", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-18T14:06:01.362458Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.2, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.5}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"repo": "https://github.com/mackron/dr_libs/blob/master/dr_flac.h", "vendor": "mackron", "modules": ["dr_flac.h"], "product": "dr_libs dr_flac.h", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "0.13.3"}, {"status": "unaffected", "version": "fefced4a64adfb1a68a2d31d882366e56096dee8", "versionType": "git"}, {"status": "unaffected", "version": "4f5a4cd3b57564d969443c580c75857e039f100a", "versionType": "git"}, {"status": "unaffected", "version": "663239a3d0460c33bd5b6e5166edcb404e3df676", "versionType": "git"}], "packageURL": "pkg:github/mackron/dr_libs", "defaultStatus": "unknown"}]}], "published": "2026-03-17T20:16:14.000", "references": [{"url": "https://github.com/mackron/dr_libs/commit/4f5a4cd3b57564d969443c580c75857e039f100a", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/mackron/dr_libs/commit/663239a3d0460c33bd5b6e5166edcb404e3df676", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/mackron/dr_libs/commit/fefced4a64adfb1a68a2d31d882366e56096dee8", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/mackron/dr_libs/issues/298", "tags": ["Exploit", "Issue Tracking", "Mitigation", "Vendor Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/mackron-dr-libs-excessive-memory-allocation-in-picture-metadata-parsing", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-789"}]}], "descriptions": [{"lang": "en", "value": "dr_libs\u00a0dr_flac.h version 0.13.3 and earlier (fixed in commits fefced4, 4f5a4cd, and 663239a) contain an uncontrolled memory allocation vulnerability in drflac__read_and_decode_metadata() that allows attackers to trigger excessive memory allocation by supplying crafted PICTURE metadata blocks. Attackers can exploit attacker-controlled mimeLength and descriptionLength fields to cause denial of service through memory exhaustion when processing FLAC streams with metadata callbacks."}, {"lang": "es", "value": "La versi\u00f3n 0.13.3 y anteriores de dr_libs contienen una vulnerabilidad de asignaci\u00f3n de memoria incontrolada en drflac__read_and_decode_metadata() que permite a los atacantes activar una asignaci\u00f3n de memoria excesiva al proporcionar bloques de metadatos PICTURE manipulados. Los atacantes pueden explotar los campos mimeLength y descriptionLength controlados por el atacante para causar una denegaci\u00f3n de servicio a trav\u00e9s del agotamiento de la memoria al procesar flujos FLAC con devoluciones de llamada de metadatos."}], "lastModified": "2026-07-14T19:16:56.610", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mackron:dr_libs:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24B8BF49-DCFF-4882-AA06-E6D9BBB5ECB8", "versionEndIncluding": "0.13.3"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}