Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111140libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data
Medium 6.1
In plain English
A medium-severity out-of-bounds read in libregf from libyal. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.1%top 97.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libregf | no fix listed | DEBIAN-CVE-2026-111140 |
| Debian:13 | libregf | no fix listed | DEBIAN-CVE-2026-111140 |
| Debian:14 | libregf | no fix listed | DEBIAN-CVE-2026-111140 |
| Ubuntu:22.04:LTS | libregf | no fix listed | UBUNTU-CVE-2026-111140 |
| Ubuntu:24.04:LTS | libregf | no fix listed | UBUNTU-CVE-2026-111140 |
| Ubuntu:26.04:LTS | libregf | no fix listed | UBUNTU-CVE-2026-111140 |
| Ubuntu:26.10 | libregf | no fix listed | UBUNTU-CVE-2026-111140 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- https://hackmd.io/@haind-pwn/libregf-value-data-offset-oob-read technical-description, exploit
- https://github.com/libyal/libregf/blob/1a4bd856484263caa4a5e0d6ba377c3dc69150c7/libregf/libregf_value_item.c#L789-L935 technical-description
- https://github.com/libyal/libregf product
- VulnCheck Advisory: libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data third-party-advisory