CVE-2026-111140 libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data
Attackers can leak heap memory or crash parsers by supplying a crafted REGF hive file to the libregf library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-111140?
CVE-2026-111140 is a medium-severity vulnerability in libyal libregf, published on 15 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-125
Which versions are affected by CVE-2026-111140?
How do I fix CVE-2026-111140?
No fix has been published for CVE-2026-111140 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111140 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111140 exists.
Sources
Also known as DEBIAN-CVE-2026-111140, GHSA-4g68-6f29-pjf8, UBUNTU-CVE-2026-111140.