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NVD / CVE Program· CNA mitre

CVE-2022-44638: In 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

Noroxi assessment

Priority: Monitor (action score 36/100)

  • 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: 1.9% (FIRST EPSS); higher than 79.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: pixman (AlmaLinux:8) 0.38.4-3.el8_9; pixman-devel (AlmaLinux:8) 0.38.4-3.el8_9; mingw32-pixman (AlmaLinux:9) 0.42.2-3.el9.

Low priority for now. Upgrade to pixman (AlmaLinux:8) 0.38.4-3.el8_9; pixman-devel (AlmaLinux:8) 0.38.4-3.el8_9; mingw32-pixman (AlmaLinux:9) 0.42.2-3.el9 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

In 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 integer overflow in pixman_sample_floor_y.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Nov 3, 2022
Updated
Jun 17, 2026
EPSS
1.9% · 79th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.9%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2022-44638

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
debiandebian linux
fedoraprojectfedora

Affected versions

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

  • debian debian linux10.0
  • debian debian linux11.0
  • fedoraproject fedora35
  • fedoraproject fedora36
  • fedoraproject fedora37
  • pixman pixmanbefore 0.42.2

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8pixmanbefore 0.38.4-3.el8_90.38.4-3.el8_9
AlmaLinux:8pixman-develbefore 0.38.4-3.el8_90.38.4-3.el8_9
AlmaLinux:9mingw32-pixmanbefore 0.42.2-3.el90.42.2-3.el9
AlmaLinux:9mingw64-pixmanbefore 0.42.2-3.el90.42.2-3.el9
AlmaLinux:9pixmanbefore 0.40.0-6.el9_30.40.0-6.el9_3
AlmaLinux:9pixman-develbefore 0.40.0-6.el9_30.40.0-6.el9_3
Alpine:v3.13pixmanbefore 0.40.0-r30.40.0-r3
Alpine:v3.15pixmanbefore 0.40.0-r40.40.0-r4
Debian:10pixmanbefore 0.36.0-1+deb10u10.36.0-1+deb10u1
Debian:11pixmanbefore 0.40.0-1.1~deb11u10.40.0-1.1~deb11u1
Debian:12pixmanbefore 0.40.0-1.10.40.0-1.1
openSUSE:Leap Micro 5.2pixmanbefore 0.34.0-150000.7.5.10.34.0-150000.7.5.1
openSUSE:Leap Micro 5.3pixmanbefore 0.40.0-150400.3.3.10.40.0-150400.3.3.1
Red Hat:enterprise_linux:8::appstreampixmanbefore 0:0.38.4-3.el8_90:0.38.4-3.el8_9
Red Hat:enterprise_linux:8::appstreampixman-debuginfobefore 0:0.38.4-3.el8_90:0.38.4-3.el8_9
Red Hat:enterprise_linux:8::appstreampixman-debugsourcebefore 0:0.38.4-3.el8_90:0.38.4-3.el8_9
Red Hat:enterprise_linux:8::appstreampixman-develbefore 0:0.38.4-3.el8_90:0.38.4-3.el8_9
Red Hat:enterprise_linux:9::appstreampixmanbefore 0:0.40.0-6.el9_30:0.40.0-6.el9_3
Red Hat:enterprise_linux:9::appstreampixman-debuginfobefore 0:0.40.0-6.el9_30:0.40.0-6.el9_3
Red Hat:enterprise_linux:9::appstreampixman-debugsourcebefore 0:0.40.0-6.el9_30:0.40.0-6.el9_3
Red Hat:enterprise_linux:9::appstreampixman-develbefore 0:0.40.0-6.el9_30:0.40.0-6.el9_3
Red Hat:enterprise_linux:9::crbmingw-pixmanbefore 0:0.42.2-3.el90:0.42.2-3.el9
Red Hat:enterprise_linux:9::crbmingw32-pixmanbefore 0:0.42.2-3.el90:0.42.2-3.el9
Red Hat:enterprise_linux:9::crbmingw32-pixman-debuginfobefore 0:0.42.2-3.el90:0.42.2-3.el9

+23

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-2023-37769stress-test master commit e4c878 was discovered to contain a FPE vulnerability via the component combine_inner at /pixman-combine-float.c.
    26Monitor

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
  • ← EarlierCVE-2013-6425Jan 18, 2014 · 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
    21Monitor

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
almalinux:mingw32-pixman0.42.2-3.el9 · AlmaLinux:9Package registry (OSV)
almalinux:mingw64-pixman0.42.2-3.el9 · AlmaLinux:9Package registry (OSV)
almalinux:pixman0.40.0-6.el9_3 · AlmaLinux:9Package registry (OSV)
almalinux:pixman-devel0.40.0-6.el9_3 · AlmaLinux:9Package registry (OSV)
alpine:pixman0.40.0-r3 · Alpine:v3.13Package registry (OSV)
debian:pixman0.40.0-1.1 · Debian:12Package registry (OSV)
opensuse:pixman0.34.0-150000.7.5.1 · openSUSE:Leap Micro 5.2Package registry (OSV)
red hat:mingw-pixman0:0.42.2-3.el9 · Red Hat:enterprise_linux:9::crbPackage registry (OSV)
red hat:mingw32-pixman0:0.42.2-3.el9 · Red Hat:enterprise_linux:9::crbPackage registry (OSV)
red hat:mingw32-pixman-debuginfo0:0.42.2-3.el9 · Red Hat:enterprise_linux:9::crbPackage registry (OSV)
red hat:mingw64-pixman0:0.42.2-3.el9 · Red Hat:enterprise_linux:9::crbPackage registry (OSV)
red hat:mingw64-pixman-debuginfo0:0.42.2-3.el9 · Red Hat:enterprise_linux:9::crbPackage registry (OSV)
red hat:pixman0:0.40.0-6.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:pixman-debuginfo0:0.40.0-6.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:pixman-debugsource0:0.40.0-6.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:pixman-devel0:0.40.0-6.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
rocky linux:mingw-pixman0:0.42.2-3.el9 · Rocky Linux:9Package registry (OSV)
rocky linux:pixman0:0.40.0-6.el9_3 · Rocky Linux:9Package registry (OSV)
suse:pixman0.34.0-150000.7.5.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3Package 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.

No commit or PR link among the references.

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

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

All records