What is CVE-2018-1000075?

CVE-2018-1000075 is a high-severity vulnerability in Rubygems, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2018-03-13.

How severe is CVE-2018-1000075?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-1000075 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Rubygems

CVE-2018-1000075

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a infinite loop caused by negative size vulnerability in ruby gem package tar header that can result in a negative size could cause an infinite loop.. This vulnerability appears to have been fixed in 2.7.6.

Published 2018-03-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.046 (91.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.046 · newest: 0.046 · change: 0.000

Affected products

Rubygems
Debian Linux — versions 7.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.debian.org/security/2018/dsa-4219 (vendor-advisory)
usn.ubuntu.com/3621-1/ (vendor-advisory)
access.redhat.com/errata/RHSA-2018:3729 (vendor-advisory)
github.com/rubygems/rubygems/commit/92e98bf8f810bd812f919120d4832df51bc25d83 (Patch, Third Party Advisory)
access.redhat.com/errata/RHSA-2018:3730 (vendor-advisory)
lists.debian.org/debian-lts-announce/2018/04/msg00023.html (mailing-list)
access.redhat.com/errata/RHSA-2018:3731 (vendor-advisory)
lists.debian.org/debian-lts-announce/2018/04/msg00001.html (mailing-list, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/07/msg00012.html (mailing-list)
www.debian.org/security/2018/dsa-4259 (vendor-advisory)

Frequently asked questions

What is CVE-2018-1000075?: CVE-2018-1000075 is a high-severity vulnerability in Rubygems, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2018-03-13.
How severe is CVE-2018-1000075?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-1000075 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.