CVE-2026-116729

libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001a

4.8 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.13%Unchanged since Oct 27, 2026

What each source reports

CVE List Score used 4.8

libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001a

Record: CVE-2026-116729
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-125
Updated: 2026-11-02

EUVDEUVD-2026-110477 4.8

Record: EUVD-2026-110477
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-2f27-2cwc-rp26 4.8

libfvde through 20260923 contains a heap out-of-bounds read vulnerability in...

Record: GHSA-2f27-2cwc-rp26
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-125
Updated: 2026-11-02

NVD 4.8

Record: CVE-2026-116729
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-125
Updated: 2026-11-03

OSV 4.8

libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001a

Record: CVE-2026-116729
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness: CWE-125
Updated: 2026-11-04

OSVUBUNTU-CVE-2026-116729 4.8

Record: UBUNTU-CVE-2026-116729
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Updated: 2026-11-02

Affected products

libyal libfvde

Affected packages

Affected packages
Package	Affected	Fixed
`libfvde` Ubuntu:18.04:LTS	All versions, plus listed versions 20160918-1build120170930-120180108-1	None known
`libfvde` Ubuntu:20.04:LTS	All versions, plus listed versions 20190104-120190104-1build120190104-1ubuntu120190104-1.1	None known
`libfvde` Ubuntu:22.04:LTS	All versions, plus listed versions 20190104-1.1build120190104-1.1build2	None known
`libfvde` Ubuntu:24.04:LTS	All versions, plus listed versions 20190104-1.1build320190104-1.1build420190104-1.220190104-1.2build120190104-1.2build2	None known
`libfvde` Ubuntu:26.10	All versions, plus listed versions 20240502-2build1	None known
`libfvde` Ubuntu:26.04:LTS	All versions, plus listed versions 20240502-1build120240502-220240502-2build1	None known

History

History
Recorded	Changed	Sources
Nov 4, 2026	facts	EUVD, NVD, OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-116729 is a medium vulnerability (CVSS 4.8) in Libyal Libfvde, published October 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.13%, the 2nd percentile. No source names a fixed version.

References

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