mackron / dr_libs dr_flac.h Excessive Memory Allocation in PICTURE Metadata Parsing
Summary
| CVE | CVE-2026-32836 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-17 20:16:14 UTC |
| Updated | 2026-04-27 16:16:43 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 6.9 MEDIUM from [email protected]
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
EPSS: 0.000150000 probability, percentile 0.033370000 (date 2026-04-27)
Problem Types: CWE-789 | CWE-789 CWE-789 Memory allocation with excessive size value
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.9 | MEDIUM | 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/C... |
| 4.0 | CNA | CVSS | 6.9 | MEDIUM | 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 |
| 3.1 | [email protected] | Secondary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | [email protected] | Primary | 6.2 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 6.2 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
Attack Vector
LocalAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
NoneIntegrity
NoneAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS: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
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Mackron | Dr Libs Dr Flac.h | affected 0.13.3 semver | Not specified |
| CNA | Mackron | Dr Libs Dr Flac.h | affected fefced4a64adfb1a68a2d31d882366e56096dee8 git | Not specified |
| CNA | Mackron | Dr Libs Dr Flac.h | affected 4f5a4cd3b57564d969443c580c75857e039f100a git | Not specified |
| CNA | Mackron | Dr Libs Dr Flac.h | affected 663239a3d0460c33bd5b6e5166edcb404e3df676 git | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/mackron/dr_libs/commit/4f5a4cd3b57564d969443c580c75857e039f100a | [email protected] | github.com | |
| github.com/mackron/dr_libs/commit/663239a3d0460c33bd5b6e5166edcb404e3df676 | [email protected] | github.com | |
| www.vulncheck.com/advisories/mackron-dr-libs-excessive-memory-allocation-in-pic... | [email protected] | www.vulncheck.com | Third Party Advisory |
| github.com/mackron/dr_libs/commit/fefced4a64adfb1a68a2d31d882366e56096dee8 | [email protected] | github.com | |
| github.com/mackron/dr_libs/issues/298 | [email protected] | github.com | Exploit, Issue Tracking, Mitigation, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Ana Kapulica (en)
There are currently no legacy QID mappings associated with this CVE.