Lout 3.40 has a buffer overflow in the StringQuotedWord() function in z39.c.

published 2019-12-20 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-9508

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

Patch / fix

distros 2

opensuse arch linux

lout openSUSE Tumbleweed 3.42-1.3
lout Package Hub 15 SP2 3.40-bp152.4.3.1
lout Package Hub 15 SP1 3.40-bp151.2.3.1
lout openSUSE Leap 15.1 3.40-lp151.2.3.1
lout openSUSE Leap 15.2 3.40-lp152.3.3.1

opensuse advisories openSUSE-SU-2024:11027-1 openSUSE-SU-2020:1813-1 openSUSE-SU-2020:1812-1 openSUSE-SU-2020:1772-1 openSUSE-SU-2020:1771-1

lout Arch Linux 3.41-1

arch linux advisories AVG-1934

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-2019-19917 updated 2026-06-26 cvss 6.6

lout: buffer overflow in StringQuotedWord in z39.c

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

1.68% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

lists.gnu.org https://lists.gnu.org/archive/html/lout-users/2019-12/msg00002.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/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-120 Buffer Copy without Checking Size of Input

References

lists.gnu.org /archive/html/lout-users/2019-12/msg00002.html
exploit, mailing-list, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2020-10/msg00069.html
vendor-advisory, mailing-list, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2020-10/msg00068.html
vendor-advisory, mailing-list, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/5OXECUBSXEO7S3TCLSBCITLQIMOCL6MV/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/NEJVEIQMRXJ26ZT6657W5RYH7YECVGNB/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/QGZKTKGRJTQE43SFU77X5QJHKXTTOJYB/
vendor-advisory
lists.opensuse.org /opensuse-security-announce/2020-11/msg00010.html
vendor-advisory, mailing-list, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2020-11/msg00011.html
vendor-advisory, mailing-list, third-party-advisory

Sources

CVE List CVE-2019-19917
NVD CVE-2019-19917

Fencer Vulns 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.

Summary