{"affected":[{"product":"VeraCrypt","source":"CNA: GitHub_M","vendor":"veracrypt","versions":[{"status":"affected","version":"< 1.26.30"}]}],"cveId":"CVE-2026-77372","cwes":["CWE-125","CWE-787"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.8,"severity":"high","source":"CNA: GitHub_M","vector":"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"},{"score":8.8,"severity":"high","source":"NVD: security-advisories@github.com","vector":"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"}],"modifiedAt":1793834278713,"publishedAt":1793832837172,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/veracrypt/VeraCrypt/commit/fb9d96c52dace4d34c5427402b512e8de5f832d6"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.30"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-4j3p-7hp7-xw73"}],"remediation":[],"revision":"8078b878a614f6322ca5f56826ffb32af8c9cdc68ba879e7d07fbc350850b4ff","sources":[{"modifiedAt":1793832837172,"name":"CNA: GitHub_M","retrievedAt":1793833922947,"url":"https://www.cve.org/CVERecord?id=CVE-2026-77372"},{"modifiedAt":1793834278713,"name":"NVD","retrievedAt":1793838309933,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77372"}],"ssvc":null,"status":"published","title":"VeraCrypt: Heap overflow and out-of-bounds read in Serializable deserialization (elevated Core service input path)","updatedAt":1793838309933}