CVE-2018-17983: mercurial Out-of-bounds Read
CVSS: 9.1v3.0CriticalModified
AliasesMGASA-2018-0442SUSE-SU-2018:3430-1GHSA-p575-cf9h-wv42PYSEC-2018-91UBUNTU-CVE-2018-17983DEBIAN-CVE-2018-17983
Published 04-10-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-17983 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in mercurial. EPSS estimates a 2.05% chance of exploitation in the next 30 days, higher than 80.9% of scored vulnerabilities.
CVSS score
9.1/10
010
Critical · v3.0 (NVD)EPSS score
2.05%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 04-10-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
cext/manifest.c in Mercurial before 4.7.2 has an out-of-bounds read during parsing of a malformed manifest entry.
CVSS metrics
6 scores · 4 sources · 3 versionsHigh 8.8Preferred score · OSV · Pypi (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:NSourcesSingle source
Critical 9.1Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HSourcesAll 4 agree
- OSV · PypiEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Medium 6.4Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.05%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
0.00 pp
From 2.05% on 19-09-2026
19-09-202619-10-2026
EPSS score2.05%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- mercurial< 4.7.2-1
Mageia1 product
- mercurial< 4.7.2-1.mga6
Mercurial1 product
- mercurial< 4.7.2
PyPI1 product
- mercurial< 4.7.2
Suse1 product
- mercurial&distro=SUSE Linux Enterprise Module for Development Tools 15< 4.5.2-3.6.1
Ubuntu1 product
- mercurial< 4.5.3-1ubuntu2.2
6 vendors · 6 products
