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CVE-2016-9558

33
FAUCET Score

CVE-2016-9558 describes a negation overflow vulnerability in libdwarf, specifically affecting libdwarf/dwarf_leb.c and dwarfdump/print_frames.c in versions prior to 20161124. This critical vulnerability, rated 9.8 CVSS, allows remote attackers to achieve high impact on confidentiality, integrity, and availability through a crafted bit pattern in a signed LEB number. Despite its severity, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), it is not listed in CISA's KEV catalog, and community discussion is minimal, with no media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1999-12-14, < 2016-11-24CPE matchmatch criteria
cpe:2.3:a:libdwarf_project:libdwarf:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.11%
Probability of exploitation in next 30 days
EPSS Percentile
91.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0511 is in the 86th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libdwarf

Vendor Advisories (1)

redhatCVE-2016-9558Low

libdwarf: Negation overflow in dwarf_leb.c

Nov 19, 2016

References

blogs.gentoo.org / ago/2016/11/19/libdwarf-negation-overflow-in-dwarf_leb-c
ExploitPatchThird Party AdvisoryVDB Entry
sourceforge.net / p/libdwarf/code/ci/4f19e1050cd8e9ddf2cb6caa061ff2fec4c9b5f9
Third Party Advisory
prevanders.net / dwarfbug.html
Third Party Advisory
openwall.com / lists/oss-security/2016/11/19/6
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2016/11/23/3
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/94491
Third Party AdvisoryVDB Entry