Vulnerability-Lookup

GHSA-JFRH-W252-Q2H4

Vulnerability from github – Published: 2026-06-22 18:34 – Updated: 2026-06-22 18:34

Details

The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.

Severity

6.8 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

7.0 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-56109"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-22T18:16:48Z",
    "severity": "HIGH"
  },
  "details": "The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.",
  "id": "GHSA-jfrh-w252-q2h4",
  "modified": "2026-06-22T18:34:18Z",
  "published": "2026-06-22T18:34:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56109"
    },
    {
      "type": "WEB",
      "url": "https://github.com/alsa-project/alsa-lib/commit/536dd6f8affdf5197c12a63a71c92a70b2833cc0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/alsa-project/alsa-lib/releases/tag/v1.2.16.1"
    },
    {
      "type": "WEB",
      "url": "https://lore.kernel.org/alsa-devel/CAGt8pqBU0p2voB+qHxWGcNJrKHAcBhAyHUUBPLBN-Yj_SiV6MQ@mail.gmail.com"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/alsa-library-double-free-via-parse-def-in-conf-c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-56109 (GCVE-0-2026-56109)

Vulnerability from cvelistv5 – Published: 2026-06-22 15:58 – Updated: 2026-06-22 17:29 X_Open Source

Title

ALSA Library < 1.2.16.1 Double-Free via parse_def() in conf.c

Summary

Severity

7 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

6.8 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-415 - Double Free

Assigner

VulnCheck

References

4 references

URL	Tags
https://lore.kernel.org/alsa-devel/CAGt8pqBU0p2vo…	technical-descriptionexploit
https://github.com/alsa-project/alsa-lib/releases…	release-notes
https://github.com/alsa-project/alsa-lib/commit/5…	patch
https://www.vulncheck.com/advisories/alsa-library…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
alsa-project	alsa-lib	Affected: 0 , < 1.2.16.1 (custom)

Date Public

2026-06-08 00:00

Credits

Dmitrijs Trizna of Aisle Research Luigino Camastra of Aisle Research Guido Vranken of Aisle Research Ze Sheng of Aisle Research

Show details on NVD website

JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-56109",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-22T17:29:11.617397Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-22T17:29:23.873Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "alsa-lib",
          "repo": "https://github.com/alsa-project/alsa-lib",
          "vendor": "alsa-project",
          "versions": [
            {
              "lessThan": "1.2.16.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "Dmitrijs Trizna of Aisle Research"
        },
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          "lang": "en",
          "type": "finder",
          "value": "Luigino Camastra of Aisle Research"
        },
        {
          "lang": "en",
          "type": "finder",
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        },
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          "lang": "en",
          "type": "finder",
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        }
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      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
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            "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:L/VA:H/SC:N/SI:N/SA:N",
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            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "name": "Release Notes",
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          "url": "https://github.com/alsa-project/alsa-lib/releases/tag/v1.2.16.1"
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        {
          "tags": [
            "third-party-advisory"
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        }
      ],
      "source": {
        "discovery": "UNKNOWN"
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        "x_open-source"
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      "title": "ALSA Library \u003c 1.2.16.1 Double-Free via parse_def() in conf.c",
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-56109",
    "datePublished": "2026-06-22T15:58:42.404Z",
    "dateReserved": "2026-06-18T19:15:10.650Z",
    "dateUpdated": "2026-06-22T17:29:23.873Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-JFRH-W252-Q2H4

CVE-2026-56109 (GCVE-0-2026-56109)

Tags

Sightings

Nomenclature