{"id":"CVE-2026-107635","title":"Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes","summary":"Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image wi…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwe":["CWE-191"],"vendor":"Aorimn","product":"dislocker","affected":["dislocker <= 0.7.3"],"published":"2026-10-08","updated":"2026-10-16","sourceUpdated":"2026-10-16T12:16:31.870","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107635","references":[{"url":"https://github.com/Aorimn/dislocker","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/fvek.c#L90-L105","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Aorimn/dislocker/blob/v0.7.3/src/metadata/vmk.c#L146-L180","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Aorimn/dislocker/commit/0706462db88efe8df88150e4c3e4332b808f4581","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/dislocker-through-0.7.3-out-of-bounds-heap-read-via-vmk-fvek-datum-size-underflow","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-107635.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-107635"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107635"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00127,"epssPercentile":0.02345,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-08T16:05:14.829892Z"},"scores":{"nvd":5.5,"cna":6.1},"ingestedAt":"2026-10-08T14:47:16.357Z","slug":"CVE-2026-107635","body":"## Overview\n\nDislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-107635.json)","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230146,"id":"CVE-2026-107635","ts":1793127220835,"field":"cvss","old":"5.5","new":"6.1"}]}