CVE-2018-18650
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch...
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.
- Record
CVE-2018-18650- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-190
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.
- Record
CVE-2018-18650- Updated
- 2026-11-02
EUVDEUVD-2018-10366 No score
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.
- Record
EUVD-2018-10366- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6h37-4rh8-55jq
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch...
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.
- Record
GHSA-6h37-4rh8-55jq- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-18650
An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.
- Record
UBUNTU-CVE-2018-18650- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
ipeUbuntu:16.04:LTS |
All versions, plus listed versions 7.1.4-2.17.1.8-17.1.10-17.1.10-1.1 |
None known |
ipeUbuntu:18.04:LTS |
All versions, plus listed versions 7.2.7-27.2.7-3 |
None known |
ipeUbuntu:20.04:LTS |
All versions, plus listed versions 7.2.9-17.2.13-27.2.13-2build1 |
None known |
ipeUbuntu:22.04:LTS |
All versions, plus listed versions 7.2.23+dfsg1-27.2.24+dfsg1-17.2.24+dfsg1-1build1 |
None known |
ipeUbuntu:24.04:LTS |
All versions, plus listed versions 7.2.27+dfsg1-27.2.28-27.2.28-2.1build27.2.28-2.1build37.2.28-2.1build4 |
None known |
ipeUbuntu:25.10 |
All versions, plus listed versions 7.2.30-1build1 |
None known |
ipeUbuntu:26.10 |
All versions, plus listed versions 7.2.30-1build27.2.30-2 |
None known |
ipeUbuntu:26.04:LTS |
All versions, plus listed versions 7.2.30-1build17.2.30-1build2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-18650 is a medium vulnerability (CVSS 5.5) in Xpdfreader Xpdf, published October 25, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. No source names a fixed version.