CVE-2026-43823

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{"affected": [{"affectedData": [{"product": "swift-crypto", "vendor": "Apple", "versions": [{"lessThan": "4.5.1", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "product-security@apple.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apple:swift-crypto:*:*:*:*:*:swift:*:*", "matchCriteriaId": "94AEC1B4-0EDF-4CA0-8593-3F4E2ADA2C04", "versionEndIncluding": "4.5.1", "versionStartIncluding": "3.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "When initializing an RSA public key from DER or PEM bytes throws an error, the EVP_PKEY* is double-freed: first in the catch block, then in the deinit. This can lead to a crash on future memory allocations. This double-free manifests when BoringSSL cannot decode the public key from the bytes provided. This vulnerability is addressed in swift-crypto version 4.5.1."}, {"lang": "es", "value": "Al inicializar una clave p\u00fablica RSA a partir de bytes DER o PEM y se produce un error, el EVP_PKEY se libera dos veces: primero en el bloque catch y luego en el deinit. Esto puede provocar un fallo en futuras asignaciones de memoria. Esta doble liberaci\u00f3n se manifiesta cuando BoringSSL no puede decodificar la clave p\u00fablica a partir de los bytes proporcionados. Esta vulnerabilidad se aborda en la versi\u00f3n 4.5.1 de swift-crypto."}], "id": "CVE-2026-43823", "lastModified": "2026-10-24T13:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43823", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-23T18:12:03.415654Z", "version": "2.0.3"}}]}, "published": "2026-07-23T15:17:05.613", "references": [{"source": "product-security@apple.com", "tags": ["Vendor Advisory"], "url": "https://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Vendor Advisory"], "url": "https://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "swift-crypto: swift-crypto: Denial of Service due to double-free during RSA public key initialization", "id": "2506494", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506494"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-763", "details": ["A flaw was found in swift-crypto. When an RSA (Rivest-Shamir-Adleman) public key is initialized from DER (Distinguished Encoding Rules) or PEM (Privacy-Enhanced Mail) formatted bytes, and an error occurs during the decoding process, a double-free vulnerability can be triggered. This issue, occurring when BoringSSL fails to decode the public key, can lead to a system crash due to corrupted memory, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-43823", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "swift-lang", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-23T14:33:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43823\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43823\nhttps://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,4.5.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "swift-crypto", "source": "cna", "vendor": "Apple"}, "product": "swift-crypto", "vendor": "apple"}], "created": "2026-07-23T16:30:09.365662+00:00", "updated": "2026-08-03T21:30:05.080489+00:00", "vendors": ["apple", "apple$PRODUCT$swift-crypto"]}