Out-of-bounds Read in Libyal Libregf
CVE-2026-111140
libregf through 20260526 contains a heap out-of-bounds read in libregf_value_item_read_value_data() because it bounds value data size without subtracting the 4-byte old-format cell offset. Attackers can supply a crafted version 1.0/1.1 REGF hive with a value data cell ending its hive bin to leak adjacent heap bytes or crash parsers like regfexport and plaso.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/libregf-value-data-offset-oob-read (technical-description, exploit)
- github.com/libyal/libregf/blob/1a4bd856484263caa4a5e0d6ba377c3dc69150c7/libregf… (technical-description)
- github.com/libyal/libregf (product)
- www.vulncheck.com/advisories/libregf-through-20260526-heap-out-of-bounds-read-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111140?
- CVE-2026-111140 is a medium-severity vulnerability in Libyal Libregf, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-10-15.
- How severe is CVE-2026-111140?
- Medium severity. CVSS v3 base score is 6.1 out of 10.