{"id":"CVE-2026-110598","title":"Libyal libpff through 20260926 contains an integer underflow in libpff_record_entry_get_multi_value() that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets","summary":"Libyal libpff through 20260926 contains an integer underflow in libpff_record_entry_get_multi_value() that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets. Attackers can craft PST, OST or PAB fi…","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-125"],"vendor":"libyal","product":"libpff","affected":["libpff <= 20260926"],"published":"2026-10-14","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:18:44.867","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110598","references":[{"url":"https://github.com/libyal/libpff/blob/03545511ab7a7a609e50ec715bdd3985c3be71c5/libpff/libpff_multi_value.c#L207-L271","label":"disclosure@vulncheck.com"},{"url":"https://github.com/libyal/libpff/blob/03545511ab7a7a609e50ec715bdd3985c3be71c5/libpff/libpff_record_entry.c#L2825-L2874","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/libpff-multivalue-offset-underflow-oob-read","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/libyal-libpff-through-20260926-heap-out-of-bounds-read-via-libpff-record-entry-get-multi-value","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00168,"epssPercentile":0.06137,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T14:49:33.739466Z"},"ingestedAt":"2026-10-14T15:36:14.001Z","slug":"CVE-2026-110598","body":"## Overview\n\nLibyal libpff through 20260926 contains an integer underflow in libpff_record_entry_get_multi_value() that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets. Attackers can craft PST, OST or PAB files with decreasing PT_MV_STRING8, PT_MV_UNICODE or PT_MV_BINARY offsets to crash libpff, pypff or pffexport and expose adjacent heap memory.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}