CVE-2026-116729 Details
Description
libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x001a() caused by an unbounded strlen on embedded XML plist data. Attackers can supply a crafted FileVault 2 volume with non-NUL-terminated plist data, causing libfvde_volume_open() to read past the heap block buffer.
A heap out-of-bounds read vulnerability has been identified in libfvde, a library for accessing FileVault Drive Encryption (FVDE) volumes, through version 20260923. The vulnerability arises in the function libfvde_encrypted_metadata_read_type_0x001a(), where an unbounded strlen operation on embedded XML plist data allows attackers to craft a FileVault 2 volume with non-NUL-terminated plist data. This manipulation causes the function libfvde_volume_open() to read beyond the allocated heap buffer.
Users can update to the latest version of libfvde, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 26, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://hackmd.io/@haindpwn/libfvde-encrypted-metadata-oob-read | CISA-ADP | BundleExploitRemedyTechnical Analysis |
| https://github.com/libyal/libfvde | [email protected] | Vendor |
| https://github.com/libyal/libfvde/blob/20260923/libfvde/libfvde_encrypted_metadata.c#L2786-L2792 | [email protected] | Source CodeVendor |
| https://github.com/libyal/libfvde/commit/c2676fe49d0da44d66e7d750e72c57d2670f0b8f | [email protected] | Source CodeVendor |
| https://github.com/libyal/libfvde/issues/70 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://hackmd.io/@haindpwn/libfvde-encrypted-metadata-oob-read | [email protected] | BundleExploitRemedyTechnical Analysis |
| https://www.vulncheck.com/advisories/libfvde-through-20260923-heap-out-of-bounds-read-via-libfvde-encrypted-metadata-read-type-0x001a | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libyal libfvde | <= 20260923 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | New CVE Received | [email protected] |