The _dwarf_decode_s_leb128_chk function in dwarf_leb.c in libdwarf through 2017-06-28 allows remote attackers to cause a denial of service…

published 2017-06-28 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-18907

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

The _dwarf_decode_s_leb128_chk function in dwarf_leb.c in libdwarf through 2017-06-28 allows remote attackers to cause a denial of service (Segmentation fault) via a crafted file.

Patch / fix

distros 2

debian arch linux

dwarfutils Debian 14, Debian 13, Debian 12 20170416-3

debian advisories DEBIAN-CVE-2017-9998

libdwarf Arch Linux 20170709-1

arch linux advisories AVG-332

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-2017-9998 updated 2026-11-07 cvss 3.3

libdwarf: Segmentation fault in the _dwarf_decode_s_leb128_chk function

Red Hat Enterprise Linux 7 libdwarf, libdwarf-tools
affected: no fix planned “Will not fix”

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

2.01% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1465756 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

bugzilla.redhat.com /show_bug.cgi?id=1465756
exploit, issue-tracking, third-party-advisory
securityfocus.com /bid/99310
vdb-entry, third-party-advisory

Sources

CVE List CVE-2017-9998
NVD CVE-2017-9998

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