An issue was discovered in ytnef before 1.9.1.

published 2017-02-24 9y ago modified 2026-06-17 4mo ago also EUVD-2017-15359

cvss: 7.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

An issue was discovered in ytnef before 1.9.1. This is related to a patch described as "1 of 9. Null Pointer Deref / calloc return value not checked."

Patch / fix

distros 2 links 3

debian ubuntu

libytnef Debian 14, Debian 13, Debian 12 1.9.1-1

debian advisories DEBIAN-CVE-2017-6298

libytnef Ubuntu 14.04 LTS 1.5-6ubuntu0.1
libytnef Ubuntu 16.04 LTS 1.5-9ubuntu0.1

ubuntu advisories UBUNTU-CVE-2017-6298

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

github.com/Yeraze/ytnef#27 pull request
openwall.com/lists/oss-security/2017/02/15/4 advisory
x41-dsec.de/lab/advisories/x41-2017-002-ytnef/ advisory

Is CVE-2017-6298 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-6298 updated 2026-01-08 cvss 6.3

ytnef: Multiple vulnerabilities fixed in 1.9.1 version

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.45% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-476 NULL Pointer Dereference

References

github.com /Yeraze/ytnef/pull/27
issue-tracking, patch, third-party-advisory
openwall.com /lists/oss-security/2017/02/15/4
mailing-list, patch, third-party-advisory
x41-dsec.de /lab/advisories/x41-2017-002-ytnef/
patch, third-party-advisory
debian.org /security/2017/dsa-3846
vendor-advisory, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ/
vendor-advisory
securityfocus.com /bid/96423
vdb-entry, third-party-advisory

Sources

CVE List CVE-2017-6298
NVD CVE-2017-6298

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.