CVE-2026-77372
Dashboard / Vulnerabilities / CVE-2026-77372
Summary: VeraCrypt: Heap overflow and out-of-bounds read in Serializable deserialization (elevated Core service input path)
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.
References: https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77372.json, https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73, https://nvd.nist.gov/vuln/detail/CVE-2026-77372, https://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6
Affected packages
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