Medium severity · published Oct 26, 2026
CVE-2026-116728
libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x0024
New
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x0024() because xml_plist_data_size is not checked against the source metadata block. Attackers can supply a crafted FileVault 2 Core Storage volume that makes libfvde_volume_open() copy past the heap block buffer, crashing the application.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libfvde · libyal
through 20260923 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116728
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116728
github.com
https://github.com/libyal/libfvde
github.com
https://github.com/libyal/libfvde/blob/20260923/libfvde/libfvde_encrypted_metadata.c#L3798-L3813
github.com
https://github.com/libyal/libfvde/commit/c2676fe49d0da44d66e7d750e72c57d2670f0b8f
github.com
https://github.com/libyal/libfvde/issues/70
hackmd.io
https://hackmd.io/@haindpwn/libfvde-encrypted-metadata-oob-read
www.vulncheck.com
https://www.vulncheck.com/advisories/libfvde-through-20260923-heap-out-of-bounds-read-via-libfvde-encrypted-metadata-read-type-0x0024
More from libfvde
3.3
CVE-2026-116729
libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001a