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NVD / CVE Program· CNA redhat

CVE-2013-6425: Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org server and cairo, allows context

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.8% (FIRST EPSS); higher than 86.9% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: pixman (Debian:12) 0.30.2-2; pixman (Debian:6.0) 0.16.4-1+deb6u1; pixman (Debian:7) 0.26.0-4+deb7u1.

Low priority for now. Upgrade to pixman (Debian:12) 0.30.2-2; pixman (Debian:6.0) 0.16.4-1+deb6u1; pixman (Debian:7) 0.26.0-4+deb7u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org server and cairo, allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value.

MediumCVSS 5.0 · v2.0—No exploit Fix available
Published
Jan 18, 2014
Updated
Jun 16, 2026
EPSS
2.8% · 86th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.8%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
pixmanpixman
canonicalubuntu linux
debiandebian linux
redhatenterprise linux desktop
redhatenterprise linux eus
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux server tus
redhatenterprise linux workstation
opensuseopensuse

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux12.04
  • canonical ubuntu linux12.10
  • canonical ubuntu linux13.04
  • canonical ubuntu linux13.10
  • debian debian linux6.0
  • debian debian linux7.0
  • opensuse opensuse11.4
  • opensuse opensuse12.2
  • opensuse opensuse12.3
  • opensuse opensuse13.1
  • pixman pixmanbefore 0.32.0
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux eus6.5
  • redhat enterprise linux server5.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux server aus6.5
  • redhat enterprise linux server tus6.5
  • redhat enterprise linux workstation5.0
  • redhat enterprise linux workstation6.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12pixmanbefore 0.30.2-20.30.2-2
Debian:6.0pixmanbefore 0.16.4-1+deb6u10.16.4-1+deb6u1
Debian:7pixmanbefore 0.26.0-4+deb7u10.26.0-4+deb7u1
Red Hat:enterprise_linux:5::clientpixmanbefore 0:0.22.0-2.2.el5_100:0.22.0-2.2.el5_10
Red Hat:enterprise_linux:5::clientpixman-debuginfobefore 0:0.22.0-2.2.el5_100:0.22.0-2.2.el5_10
Red Hat:enterprise_linux:5::clientpixman-develbefore 0:0.22.0-2.2.el5_100:0.22.0-2.2.el5_10
Red Hat:enterprise_linux:6::clientpixmanbefore 0:0.26.2-5.1.el6_50:0.26.2-5.1.el6_5
Red Hat:enterprise_linux:6::clientpixman-debuginfobefore 0:0.26.2-5.1.el6_50:0.26.2-5.1.el6_5
Red Hat:enterprise_linux:6::clientpixman-develbefore 0:0.26.2-5.1.el6_50:0.26.2-5.1.el6_5

Same product

pixman: all records

Other highest-scoring records for the same primary product.

  • CVE-2014-9766Integer overflow in the create_bits function in pixman-bits-image.c in Pixman before 0.32.6 allows remote attackers to cause a denial of ser
    41Plan
  • CVE-2015-5297An integer overflow issue has been reported in the general_composite_rect() function in pixman prior to version 0.32.8.
    39Monitor
  • CVE-2022-44638In libpixman in Pixman before 0.42.2, there is an out-of-bounds write (aka heap-based buffer overflow) in rasterize_edges_8 due to an intege
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2013-6424Jan 18, 2014 · Integer underflow in the xTrapezoidValid macro in render/picture.h in X.Org allows context-dependent attackers to cause a denial of service
    21Monitor
  • Later →CVE-2023-37769Jul 17, 2023 · stress-test master commit e4c878 was discovered to contain a FPE vulnerability via the component combine_inner at /pixman-combine-float.c.
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:pixman0.30.2-2 · Debian:12Package registry (OSV)
red hat:pixman0:0.22.0-2.2.el5_10 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:pixman-debuginfo0:0.22.0-2.2.el5_10 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:pixman-devel0:0.22.0-2.2.el5_10 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
P

Weakness class (CWE)

CWE-191 · Integer Underflow (Wrap or Wraparound)

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (12 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records