CVE catalog

CVE-2026-111146

ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a

[CVE catalog]

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, 6:57:36 PM UTC
Updated: Oct 15, 2026, 8:17:11 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.13% · Oct 25, 2026

ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a crafted winmail.dat whose decompressed RTF lacks a NUL terminator, causing printf to over-read, crashing ytnefprint and leaking adjacent heap bytes.

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	libytnef	sid	`2.1.2-1`	unknown
Debian	libytnef	forky	`2.1.2-1`	unknown
Debian	libytnef	trixie	`2.1.2-1`	unknown
Debian	libytnef	bookworm	`2.0-1`	unknown

Fixed-version evidence

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

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libytnef0]Affected
Source package: [libytnef]
Details (2)
- 2.0-1+b1 · amd64 · bookworm
  Affected
  nvd · libytnef · debian · bookworm; nvd · libytnef · debian · 12
- 2.0-1+b1 · arm64 · bookworm
  Affected
  nvd · libytnef · debian · bookworm; nvd · libytnef · debian · 12
[libytnef0-dev]Affected
Source package: [libytnef]
Details (2)
- 2.0-1+b1 · amd64 · bookworm
  Affected
  nvd · libytnef · debian · bookworm; nvd · libytnef · debian · 12
- 2.0-1+b1 · arm64 · bookworm
  Affected
  nvd · libytnef · debian · bookworm; nvd · libytnef · debian · 12
[ytnef-tools]Affected
Source package: [libytnef]
Details (2)
- 2.0-1+b1 · amd64 · bookworm
  Affected
  nvd · libytnef · debian · bookworm; nvd · libytnef · debian · 12
- 2.0-1+b1 · arm64 · bookworm
  Affected
  nvd · libytnef · debian · bookworm; nvd · libytnef · debian · 12

[Debian 13 (Trixie)]

[libytnef0]Affected
Source package: [libytnef]
Details (2)
- 2.1.2-1+b2 · amd64 · trixie
  Affected
  nvd · libytnef · debian · 13
- 2.1.2-1+b2 · arm64 · trixie
  Affected
  nvd · libytnef · debian · 13
[libytnef0-dev]Affected
Source package: [libytnef]
Details (2)
- 2.1.2-1+b2 · amd64 · trixie
  Affected
  nvd · libytnef · debian · 13
- 2.1.2-1+b2 · arm64 · trixie
  Affected
  nvd · libytnef · debian · 13
[ytnef-tools]Affected
Source package: [libytnef]
Details (2)
- 2.1.2-1+b2 · amd64 · trixie
  Affected
  nvd · libytnef · debian · 13
- 2.1.2-1+b2 · arm64 · trixie
  Affected
  nvd · libytnef · debian · 13

Observed: Oct 24, 2026, 7:29:23 PM UTC

References

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