CVE-2026-61721

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-61721", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-10T18:51:13.920Z", "datePublished": "2026-09-18T20:00:29.403Z", "dateUpdated": "2026-09-18T20:21:42.856Z"}, "containers": {"cna": {"title": "FluidSynth: Heap-based buffer overrun for DLS samples", "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "lang": "en", "description": "CWE-122: Heap-based Buffer Overflow", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-59ph-rx8r-8p4j", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-59ph-rx8r-8p4j"}, {"name": "https://github.com/FluidSynth/fluidsynth/commit/2354c2a9acdb26de7cdcd37c903ee108f46c0a7d", "tags": ["x_refsource_MISC"], "url": "https://github.com/FluidSynth/fluidsynth/commit/2354c2a9acdb26de7cdcd37c903ee108f46c0a7d"}, {"name": "https://github.com/FluidSynth/fluidsynth/releases/tag/v2.5.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/FluidSynth/fluidsynth/releases/tag/v2.5.6"}], "affected": [{"vendor": "FluidSynth", "product": "fluidsynth", "versions": [{"version": ">= 2.5.0, < 2.5.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T20:00:29.403Z"}, "descriptions": [{"lang": "en", "value": "FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loop_start and wsmp.loop_length values to samples without calling fluid_sample_validate() or fluid_sample_sanitize_loop(). A crafted DLS file can place sample loop points beyond the sample buffer, causing out-of-bounds reads during audio rendering, undefined behavior, possible memory disclosure, and denial of service. Builds compiled with the CMake option enable-native-dls set to OFF do not expose the affected parser. This issue is fixed in version 2.5.6."}], "source": {"advisory": "GHSA-59ph-rx8r-8p4j", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-18T20:21:34.730495Z", "id": "CVE-2026-61721", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-18T20:21:42.856Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-61721", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-18T20:21:34.730495Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-18T20:21:39.282Z"}}], "cna": {"title": "FluidSynth: Heap-based buffer overrun for DLS samples", "source": {"advisory": "GHSA-59ph-rx8r-8p4j", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "FluidSynth", "product": "fluidsynth", "versions": [{"status": "affected", "version": ">= 2.5.0, < 2.5.6"}]}], "references": [{"url": "https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-59ph-rx8r-8p4j", "name": "https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-59ph-rx8r-8p4j", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/FluidSynth/fluidsynth/commit/2354c2a9acdb26de7cdcd37c903ee108f46c0a7d", "name": "https://github.com/FluidSynth/fluidsynth/commit/2354c2a9acdb26de7cdcd37c903ee108f46c0a7d", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/FluidSynth/fluidsynth/releases/tag/v2.5.6", "name": "https://github.com/FluidSynth/fluidsynth/releases/tag/v2.5.6", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loop_start and wsmp.loop_length values to samples without calling fluid_sample_validate() or fluid_sample_sanitize_loop(). A crafted DLS file can place sample loop points beyond the sample buffer, causing out-of-bounds reads during audio rendering, undefined behavior, possible memory disclosure, and denial of service. Builds compiled with the CMake option enable-native-dls set to OFF do not expose the affected parser. This issue is fixed in version 2.5.6."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-122", "description": "CWE-122: Heap-based Buffer Overflow"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125: Out-of-bounds Read"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T20:00:29.403Z"}}}, "cveMetadata": {"cveId": "CVE-2026-61721", "state": "PUBLISHED", "dateUpdated": "2026-09-18T20:21:42.856Z", "dateReserved": "2026-07-10T18:51:13.920Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-18T20:00:29.403Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "fluidsynth", "vendor": "FluidSynth", "versions": [{"status": "affected", "version": ">= 2.5.0, < 2.5.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loop_start and wsmp.loop_length values to samples without calling fluid_sample_validate() or fluid_sample_sanitize_loop(). A crafted DLS file can place sample loop points beyond the sample buffer, causing out-of-bounds reads during audio rendering, undefined behavior, possible memory disclosure, and denial of service. Builds compiled with the CMake option enable-native-dls set to OFF do not expose the affected parser. This issue is fixed in version 2.5.6."}], "id": "CVE-2026-61721", "lastModified": "2026-09-23T18:12:04.247", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-61721", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-18T20:21:34.730495Z", "version": "2.0.3"}}]}, "published": "2026-09-18T20:17:18.567", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/FluidSynth/fluidsynth/commit/2354c2a9acdb26de7cdcd37c903ee108f46c0a7d"}, {"source": "security-advisories@github.com", "url": "https://github.com/FluidSynth/fluidsynth/releases/tag/v2.5.6"}, {"source": "security-advisories@github.com", "url": "https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-59ph-rx8r-8p4j"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.5.0,2.5.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "fluidsynth", "source": "cna", "vendor": "FluidSynth"}, "product": "fluidsynth", "vendor": "fluidsynth"}], "created": "2026-09-19T11:30:06.474928+00:00", "updated": "2026-09-20T02:00:12.800219+00:00", "vendors": ["fluidsynth", "fluidsynth$PRODUCT$fluidsynth"]}