CVE-2022-44638

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-11-03. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
74%
KEV
Not listed

Published

November 3, 2022

Last Modified

May 2, 2025

Advisory Details (8)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available.
generic

oss-security - Fwd: [ANNOUNCE] pixman release 0.42.2 now available

http://www.openwall.com/lists/oss-security/2022/11/05/1
generic

Locked Out | Packet Storm

http://packetstormsecurity.com/files/170121/pixman-pixman_sample_floor_y-Integer-Overflow.html
generic

[SECURITY] [DSA 5276-1] pixman security update

https://www.debian.org/security/2022/dsa-5276
generic

[SECURITY] Fedora 37 Update: mingw-pixman-0.42.2-1.fc37 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/
generic

[SECURITY] Fedora 35 Update: mingw-pixman-0.42.2-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D/
generic

[SECURITY] Fedora 36 Update: mingw-pixman-0.42.2-1.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE/
generic Patch Available

[SECURITY] [DLA 3179-1] pixman security update

https://lists.debian.org/debian-lts-announce/2022/11/msg00008.html
generic🟡 PoC Available

Integer overflow in pixman_sample_floor_y leading to heap out-of-bounds write (#63) · Issues · Pixman / pixman · GitLab

https://gitlab.freedesktop.org/pixman/pixman/-/issues/63

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibpixman-1-dev (0.40.0-1ubuntu0.22.04.1) @ jammy2026-05-25ubuntu
ubuntulibpixman-1-dev (0.33.6-1ubuntu0.1~esm1) @ xenial2026-05-25ubuntu
redhatmingw-pixman-0:0.42.2-3.el92024-04-30redhat
redhatpixman-0:0.38.4-3.el8_92024-01-10redhat
redhatpixman-0:0.40.0-6.el9_32023-12-12redhat
redhatpixman-0:0.38.4-3.el8_82023-11-28redhat
redhatpixman-0:0.40.0-6.el9_22023-11-21redhat
redhatpixman-0:0.38.4-3.el8_62023-11-21redhat
redhatpixman-0:0.40.0-6.el9_02023-11-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-r3—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-r3—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-r4—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-r4—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
pixman0.36.0-1, 0.36.0-1+alpha0.36.0-1+deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
pixman0.40.0-10.40.0-1.1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-1.1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-1.1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pixman—0.40.0-1.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(10)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 160 total refreshes for this CVE.

  1. 2026-09-19 15:38 UTCEPSS rescore
  2. 2026-09-16 14:05 UTCEPSS rescore
  3. 2026-09-16 05:10 UTCEPSS rescore
  4. 2026-09-15 03:07 UTCEPSS rescore
  5. 2026-09-13 16:44 UTCEPSS rescore
  6. 2026-09-12 14:57 UTCEPSS rescore
  7. 2026-09-11 14:50 UTCEPSS rescore
  8. 2026-09-11 09:33 UTCEPSS rescore
  9. 2026-09-08 21:57 UTCEPSS rescore
  10. 2026-09-07 15:58 UTCEPSS rescore
  11. 2026-09-06 13:45 UTCEPSS rescore
  12. 2026-09-05 15:25 UTCEPSS rescore
  13. 2026-09-04 23:59 UTCOSV refresh
  14. 2026-09-04 13:57 UTCEPSS rescore
  15. 2026-09-04 05:04 UTCEPSS rescore
  16. 2026-09-02 14:09 UTCEPSS rescore
  17. 2026-09-01 13:51 UTCEPSS rescore
  18. 2026-08-30 19:15 UTCEPSS rescore
  19. 2026-08-30 19:14 UTCEPSS rescore
  20. 2026-08-30 01:19 UTCEPSS rescore
  21. 2026-08-28 21:38 UTCEPSS rescore
  22. 2026-08-27 14:22 UTCEPSS rescore
  23. 2026-08-26 14:43 UTCEPSS rescore
  24. 2026-08-25 13:46 UTCEPSS rescore
  25. 2026-08-24 14:13 UTCEPSS rescore
Show 75 more
  1. 2026-08-23 00:17 UTCEPSS rescore
  2. 2026-08-21 23:46 UTCEPSS rescore
  3. 2026-08-20 22:53 UTCEPSS rescore
  4. 2026-08-19 17:01 UTCEPSS rescore
  5. 2026-08-19 17:01 UTCEPSS rescore
  6. 2026-08-18 13:45 UTCEPSS rescore
  7. 2026-08-18 10:51 UTCOSV refresh
  8. 2026-08-17 13:44 UTCEPSS rescore
  9. 2026-08-16 14:53 UTCEPSS rescore
  10. 2026-08-16 14:53 UTCEPSS rescore
  11. 2026-08-16 02:12 UTCEPSS rescore
  12. 2026-08-15 01:27 UTCEPSS rescore
  13. 2026-08-13 21:58 UTCEPSS rescore
  14. 2026-08-13 21:58 UTCEPSS rescore
  15. 2026-08-12 13:48 UTCEPSS rescore
  16. 2026-08-11 13:39 UTCEPSS rescore
  17. 2026-08-09 13:44 UTCEPSS rescore
  18. 2026-08-08 16:34 UTCEPSS rescore
  19. 2026-08-07 16:24 UTCEPSS rescore
  20. 2026-08-06 13:44 UTCEPSS rescore
  21. 2026-08-05 19:15 UTCEPSS rescore
  22. 2026-08-04 15:07 UTCEPSS rescore
  23. 2026-08-04 10:35 UTCEPSS rescore
  24. 2026-08-03 10:33 UTCEPSS rescore
  25. 2026-08-03 06:27 UTCOSV refresh
  26. 2026-08-02 02:24 UTCEPSS rescore
  27. 2026-08-02 02:24 UTCEPSS rescore
  28. 2026-08-01 04:13 UTCEPSS rescore
  29. 2026-08-01 04:13 UTCEPSS rescore
  30. 2026-07-30 16:25 UTCEPSS rescore
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  32. 2026-07-30 01:28 UTCEPSS rescore
  33. 2026-07-28 15:34 UTCEPSS rescore
  34. 2026-07-26 14:52 UTCEPSS rescore
  35. 2026-07-26 14:52 UTCEPSS rescore
  36. 2026-07-25 14:15 UTCEPSS rescore
  37. 2026-07-24 14:15 UTCEPSS rescore
  38. 2026-07-23 14:16 UTCEPSS rescore
  39. 2026-07-23 02:14 UTCEG score recompute
  40. 2026-07-22 23:02 UTCEG score recompute
  41. 2026-07-22 14:06 UTCEPSS rescore
  42. 2026-07-21 15:23 UTCEPSS rescore
  43. 2026-07-21 15:23 UTCEPSS rescore
  44. 2026-07-20 17:05 UTCEPSS rescore
  45. 2026-07-19 14:29 UTCEPSS rescore
  46. 2026-07-19 02:27 UTCEPSS rescore
  47. 2026-07-19 02:27 UTCEPSS rescore
  48. 2026-07-18 10:03 UTCEPSS rescore
  49. 2026-07-18 10:03 UTCEPSS rescore
  50. 2026-07-16 16:19 UTCOSV refresh
  51. 2026-07-15 16:56 UTCEPSS rescore
  52. 2026-07-15 16:56 UTCEPSS rescore
  53. 2026-07-15 01:58 UTCEPSS rescore
  54. 2026-07-13 22:28 UTCEPSS rescore
  55. 2026-07-13 06:11 UTCEPSS rescore
  56. 2026-07-12 05:44 UTCEPSS rescore
  57. 2026-07-11 08:25 UTCEPSS rescore
  58. 2026-07-11 08:25 UTCEPSS rescore
  59. 2026-07-09 19:08 UTCEPSS rescore
  60. 2026-07-08 15:12 UTCEPSS rescore
  61. 2026-07-06 16:25 UTCEPSS rescore
  62. 2026-07-06 02:21 UTCEPSS rescore
  63. 2026-07-05 02:28 UTCEPSS rescore
  64. 2026-07-04 06:29 UTCEPSS rescore
  65. 2026-07-02 16:58 UTCEPSS rescore
  66. 2026-07-01 15:04 UTCEPSS rescore
  67. 2026-06-30 23:20 UTCEPSS rescore
  68. 2026-06-30 23:20 UTCEPSS rescore
  69. 2026-06-28 14:32 UTCOSV refresh
  70. 2026-06-28 14:06 UTCEPSS rescore
  71. 2026-06-28 04:54 UTCEPSS rescore
  72. 2026-06-28 04:54 UTCEPSS rescore
  73. 2026-06-27 03:07 UTCEPSS rescore
  74. 2026-06-27 03:07 UTCEPSS rescore
  75. 2026-06-25 13:48 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2022-44638?
CVE-2022-44638 is a high vulnerability published on November 3, 2022. In libpixman in Pixman before 0.42.2, there is an out-of-bounds write (aka heap-based buffer overflow) in rasterizeedges8 due to an integer overflow in pixmansamplefloor_y.
When was CVE-2022-44638 disclosed?
CVE-2022-44638 was first published in the National Vulnerability Database on November 3, 2022, with the most recent update on May 2, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-44638 actively exploited?
CVE-2022-44638 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 26.5% of all scored CVEs.
What is the CVSS score of CVE-2022-44638?
CVE-2022-44638 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2022-44638?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-44638, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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