CVE-2026-32836 (GCVE-0-2026-32836)

Vulnerability from cvelistv5 – Published: 2026-03-17 19:10 – Updated: 2026-07-28 01:48
VLAI
Title
mackron / dr_libs dr_flac.h Excessive Memory Allocation in PICTURE Metadata Parsing
Summary
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.
Severity
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
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-18 14:06 UTC
CWE
  • CWE-789 - Memory allocation with excessive size value
Assigner
References
Impacted products
Vendor Product Version CPE status
mackron dr_libs dr_flac.h Affected: 0 , ≤ 0.13.3 (semver)
Unaffected: fefced4a64adfb1a68a2d31d882366e56096dee8 (git)
Unaffected: 4f5a4cd3b57564d969443c580c75857e039f100a (git)
Unaffected: 663239a3d0460c33bd5b6e5166edcb404e3df676 (git)
    cpe:2.3:a:mackron:dr_libs:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Ana Kapulica
Show details on NVD website
To clipboard 

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                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "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",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "format": "CVSS",
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                  "lang": "en",
                  "value": "GENERAL"
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              ]
            },
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              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 6.2,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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          "problemTypes": [
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              "descriptions": [
                {
                  "cweId": "CWE-789",
                  "description": "CWE-789 Memory allocation with excessive size value",
                  "lang": "en",
                  "type": "CWE"
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              ]
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          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-28T01:48:36.035Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
            "shortName": "VulnCheck"
          },
          "references": [
            {
              "tags": [
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              "url": "https://github.com/mackron/dr_libs/issues/298"
            },
            {
              "tags": [
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              "url": "https://github.com/mackron/dr_libs/commit/fefced4a64adfb1a68a2d31d882366e56096dee8"
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            },
            {
              "tags": [
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              ],
              "url": "https://www.vulncheck.com/advisories/mackron-dr-libs-excessive-memory-allocation-in-picture-metadata-parsing"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "mackron / dr_libs dr_flac.h Excessive Memory Allocation in PICTURE Metadata Parsing",
          "x_generator": {
            "engine": "Vulnogram 1.0.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-32836",
        "datePublished": "2026-03-17T19:10:19.404Z",
        "dateReserved": "2026-03-16T18:11:41.757Z",
        "dateUpdated": "2026-07-28T01:48:36.035Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.