CVE-2026-77372

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{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-77372", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-20T19:36:13.805Z", "datePublished": "2026-11-04T22:53:57.172Z", "dateUpdated": "2026-11-09T22:03:22.734Z"}, "containers": {"cna": {"title": "VeraCrypt: Heap overflow and out-of-bounds read in Serializable deserialization (elevated Core service input path)", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "version": "4.0"}}], "references": [{"name": "https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73"}, {"name": "https://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6", "tags": ["x_refsource_MISC"], "url": "https://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6"}, {"name": "https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30", "tags": ["x_refsource_MISC"], "url": "https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30"}], "affected": [{"vendor": "veracrypt", "product": "VeraCrypt", "versions": [{"version": "< 1.26.30", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-04T22:53:57.172Z"}, "descriptions": [{"lang": "en", "value": "VeraCrypt provides disk encryption with strong security based on TrueCrypt. Prior to 1.26.30, the Unix, macOS, and FreeBSD serialization paths in src/Platform/Serializer.cpp and src/Volume/VolumePassword.cpp accept untrusted length and count values when deserializing data that can cross from the unprivileged GUI or CLI to the root CoreService helper. Serializer::DeserializeWString allocates floor(size / sizeof(wchar_t)) elements but reads size bytes, so a non-aligned size can overflow the heap allocation. VolumePassword::Deserialize accepts PasswordSize values larger than the fixed 128-byte PasswordBuffer, allowing downstream DataPtr() and Size() consumers such as the KDF to read beyond the buffer. DeserializeString, DeserializeWString, and the string and wide-string list readers also lack allocation and collection bounds, which can exhaust memory, and a zero-length DeserializeString can access an empty vector. Windows uses a different path, and the immediate CoreService pipe writer is the same-user parent process, so the documented exposure is a local defense-in-depth boundary rather than a remote attack. This issue is fixed in 1.26.30."}], "source": {"advisory": "GHSA-4j3p-7hp7-xw73", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-77372", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-09T22:03:11.106487Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-09T22:03:18.312Z"}}]}}

{"affected": [{"affectedData": [{"product": "VeraCrypt", "vendor": "veracrypt", "versions": [{"status": "affected", "version": "< 1.26.30"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "VeraCrypt provides disk encryption with strong security based on TrueCrypt. Prior to 1.26.30, the Unix, macOS, and FreeBSD serialization paths in src/Platform/Serializer.cpp and src/Volume/VolumePassword.cpp accept untrusted length and count values when deserializing data that can cross from the unprivileged GUI or CLI to the root CoreService helper. Serializer::DeserializeWString allocates floor(size / sizeof(wchar_t)) elements but reads size bytes, so a non-aligned size can overflow the heap allocation. VolumePassword::Deserialize accepts PasswordSize values larger than the fixed 128-byte PasswordBuffer, allowing downstream DataPtr() and Size() consumers such as the KDF to read beyond the buffer. DeserializeString, DeserializeWString, and the string and wide-string list readers also lack allocation and collection bounds, which can exhaust memory, and a zero-length DeserializeString can access an empty vector. Windows uses a different path, and the immediate CoreService pipe writer is the same-user parent process, so the documented exposure is a local defense-in-depth boundary rather than a remote attack. This issue is fixed in 1.26.30."}], "id": "CVE-2026-77372", "lastModified": "2026-11-12T22:18:35.610", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-77372", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-09T22:03:11.106487Z", "version": "2.0.3"}}]}, "published": "2026-11-04T23:17:58.713", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6"}, {"source": "security-advisories@github.com", "url": "https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30"}, {"source": "security-advisories@github.com", "url": "https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "veracrypt: veracrypt: Privilege escalation via deserialization buffer overflow", "id": "2567869", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567869"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["VeraCrypt provides disk encryption with strong security based on TrueCrypt. Prior to 1.26.30, the Unix, macOS, and FreeBSD serialization paths in src/Platform/Serializer.cpp and src/Volume/VolumePassword.cpp accept untrusted length and count values when deserializing data that can cross from the unprivileged GUI or CLI to the root CoreService helper. Serializer::DeserializeWString allocates floor(size / sizeof(wchar_t)) elements but reads size bytes, so a non-aligned size can overflow the heap allocation. VolumePassword::Deserialize accepts PasswordSize values larger than the fixed 128-byte PasswordBuffer, allowing downstream DataPtr() and Size() consumers such as the KDF to read beyond the buffer. DeserializeString, DeserializeWString, and the string and wide-string list readers also lack allocation and collection bounds, which can exhaust memory, and a zero-length DeserializeString can access an empty vector. Windows uses a different path, and the immediate CoreService pipe writer is the same-user parent process, so the documented exposure is a local defense-in-depth boundary rather than a remote attack. This issue is fixed in 1.26.30.", "A flaw was found in VeraCrypt. The deserialization routines responsible for processing messages sent from unprivileged user interfaces to the elevated root service fail to properly validate data lengths and element counts. A local attacker can exploit this flaw by sending specially crafted serialization payloads to the privileged service, triggering a heap-based buffer overflow or an out-of-bounds memory read. This issue may allow the attacker to execute arbitrary code with elevated privileges, disclose sensitive memory, or cause a denial of service (DoS)."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-77372", "public_date": "2026-11-04T22:53:57Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-77372\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-77372\nhttps://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6\nhttps://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30\nhttps://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73"], "statement": "This vulnerability is rated as Important because an unprivileged local attacker can exploit the inter-process communication boundary to gain root privileges. Although exploitation requires local authentication rather than remote access, the ability to fully compromise the host by targeting the elevated background daemon elevates the severity above Moderate. Red Hat Enterprise Linux relies on LUKS and cryptsetup for storage encryption and does not include VeraCrypt, meaning default installations are unaffected.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.26.30)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "VeraCrypt", "source": "cna", "vendor": "veracrypt"}, "product": "veracrypt", "vendor": "veracrypt"}], "created": "2026-11-05T00:45:14.770553+00:00", "updated": "2026-11-05T01:00:17.322806+00:00", "vendors": ["veracrypt", "veracrypt$PRODUCT$veracrypt"]}