CVE catalog

CVE-2026-111133

libfsapfs: CVE-2026-111133

Severity: Medium · CVSS 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/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
Published: Oct 15, 2026, 6:57:27 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.20% · Oct 25, 2026

libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libfsapfs	sid	`20240429-2`	unknown
Debian	libfsapfs	forky	`20240429-2`	unknown
Debian	libfsapfs	trixie	`20240429-1`	unknown
Debian	libfsapfs	bookworm	`20201107-1`	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libfsapfs	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libfsapfs	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libfsapfs	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libfsapfs	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libfsapfs1]Affected
Source package: [libfsapfs]
Details (2)
- 20201107-1+b3 · amd64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
- 20201107-1+b3 · arm64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
[libfsapfs-dev]Affected
Source package: [libfsapfs]
Details (2)
- 20201107-1+b3 · amd64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
- 20201107-1+b3 · arm64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
[libfsapfs-utils]Affected
Source package: [libfsapfs]
Details (2)
- 20201107-1+b3 · amd64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
- 20201107-1+b3 · arm64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
[python3-fsapfs]Affected
Source package: [libfsapfs]
Details (2)
- 20201107-1+b3 · amd64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12
- 20201107-1+b3 · arm64 · bookworm
  Affected
  dsa · libfsapfs · debian · bookworm; dsa · libfsapfs · debian · 12

[Debian 13 (Trixie)]

[libfsapfs1t64]Affected
Source package: [libfsapfs]
Details (2)
- 20240429-1+b1 · amd64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
- 20240429-1+b1 · arm64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
[libfsapfs-dev]Affected
Source package: [libfsapfs]
Details (2)
- 20240429-1+b1 · amd64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
- 20240429-1+b1 · arm64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
[libfsapfs-utils]Affected
Source package: [libfsapfs]
Details (2)
- 20240429-1+b1 · amd64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
- 20240429-1+b1 · arm64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
[python3-fsapfs]Affected
Source package: [libfsapfs]
Details (2)
- 20240429-1+b1 · amd64 · trixie
  Affected
  dsa · libfsapfs · debian · 13
- 20240429-1+b1 · arm64 · trixie
  Affected
  dsa · libfsapfs · debian · 13

Observed: Oct 24, 2026, 9:15:44 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]