CVE catalog

CVE-2026-110598

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 14, 2026, 2:16:40 PM UTC
Updated: Oct 14, 2026, 3:17:11 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.17% · Oct 25, 2026

Libyal libpff through 20260926 contains an integer underflow in libpff_record_entry_get_multi_value() that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets. Attackers can craft PST, OST or PAB files with decreasing PT_MV_STRING8, PT_MV_UNICODE or PT_MV_BINARY offsets to crash libpff, pypff or pffexport and expose adjacent heap memory.

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	libpff	sid	`20231205-1`	unknown
Debian	libpff	forky	`20231205-1`	unknown
Debian	libpff	trixie	`20180714-3.1`	unknown
Debian	libpff	bookworm	`20180714-3`	unknown

Fixed-version evidence

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

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libpff1]Affected
Source package: [libpff]
Details (2)
- 20180714-3+b2 · amd64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
- 20180714-3+b2 · arm64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
[libpff-dev]Affected
Source package: [libpff]
Details (2)
- 20180714-3+b2 · amd64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
- 20180714-3+b2 · arm64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
[pff-tools]Affected
Source package: [libpff]
Details (2)
- 20180714-3+b2 · amd64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
- 20180714-3+b2 · arm64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
[python3-pypff]Affected
Source package: [libpff]
Details (2)
- 20180714-3+b2 · amd64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12
- 20180714-3+b2 · arm64 · bookworm
  Affected
  nvd · libpff · debian · bookworm; nvd · libpff · debian · 12

[Debian 13 (Trixie)]

[libpff1t64]Affected
Source package: [libpff]
Details (2)
- 20180714-3.1+b2 · amd64 · trixie
  Affected
  nvd · libpff · debian · 13
- 20180714-3.1+b3 · arm64 · trixie
  Affected
  nvd · libpff · debian · 13
[libpff-dev]Affected
Source package: [libpff]
Details (2)
- 20180714-3.1+b2 · amd64 · trixie
  Affected
  nvd · libpff · debian · 13
- 20180714-3.1+b3 · arm64 · trixie
  Affected
  nvd · libpff · debian · 13
[pff-tools]Affected
Source package: [libpff]
Details (2)
- 20180714-3.1+b2 · amd64 · trixie
  Affected
  nvd · libpff · debian · 13
- 20180714-3.1+b3 · arm64 · trixie
  Affected
  nvd · libpff · debian · 13
[python3-pypff]Affected
Source package: [libpff]
Details (2)
- 20180714-3.1+b2 · amd64 · trixie
  Affected
  nvd · libpff · debian · 13
- 20180714-3.1+b3 · arm64 · trixie
  Affected
  nvd · libpff · debian · 13

Observed: Oct 24, 2026, 12:47:26 AM UTC

References

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