CVE-2026-116728

3th percentile - higher than 3% of all known CVEs

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.

Crashes of applications processing encrypted volumes or heap memory data leakage may occur. Organizations analyzing FileVault 2 volumes are exposed to disruption and information disclosure.

Update libfvde to a version newer than 20260923 if available, or apply the vendor patch. Restrict processing of untrusted FileVault 2 volumes until updated.