Medium severity · published Oct 15, 2026
CVE-2026-111140
libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data
6.1
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libregf · libyal
through 20260526 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111140
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111140
github.com
https://github.com/libyal/libregf
github.com
https://github.com/libyal/libregf/blob/1a4bd856484263caa4a5e0d6ba377c3dc69150c7/libregf/libregf_value_item.c#L789-L935
hackmd.io
https://hackmd.io/@haind-pwn/libregf-value-data-offset-oob-read
www.vulncheck.com
https://www.vulncheck.com/advisories/libregf-through-20260526-heap-out-of-bounds-read-via-libregf-value-item-read-value-data