CVE-2018-25032

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
7.5
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 52%
CISA-KEV: Not listedEPSS: 52%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
98.8%
KEV
Not listed

Published

March 25, 2022

Last Modified

July 14, 2026

Advisory Details (9)

Auto-updated Jul 14, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: github_commit.
generic Patch Available

[SECURITY] [DLA 2968-1] zlib security update

https://lists.debian.org/debian-lts-announce/2022/04/msg00000.html
generic

CVE-2018-25032 (zlib memory corruption on deflate) · Issue #605 · madler/zlib · GitHub

https://github.com/madler/zlib/issues/605
generic

Comparing v1.2.11...v1.2.12 · madler/zlib · GitHub

https://github.com/madler/zlib/compare/v1.2.11...v1.2.12
github_commit Patch Available

commit 5c44459c3b28 (madler/zlib)

Patch available: madler/zlib v1.2.13 (contains commit 5c44459c3b28)

https://github.com/madler/zlib/commit/5c44459c3b28a9bd3283aaceab7c615f8020c531
generic

oss-security - Re: zlib memory corruption on deflate (i.e. compress)

http://www.openwall.com/lists/oss-security/2022/03/26/1
generic

oss-security - Re: zlib memory corruption on deflate (i.e. compress)

http://www.openwall.com/lists/oss-security/2022/03/25/2
generic

Full Disclosure: APPLE-SA-2022-05-16-2 macOS Monterey 12.4

http://seclists.org/fulldisclosure/2022/May/38
generic🔴 Active Exploitation

Full Disclosure: APPLE-SA-2022-05-16-3 macOS Big Sur 11.6.6

http://seclists.org/fulldisclosure/2022/May/35
generic

Full Disclosure: APPLE-SA-2022-05-16-4 Security Update 2022-004 Catalina

http://seclists.org/fulldisclosure/2022/May/33

Vendor Advisories for CVE-2018-25032(11)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(27)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibklibc-dev (2.0.13-4ubuntu0.1) @ noble2026-05-26ubuntu
ubuntuzlib1g-dev (1:1.2.8.dfsg-2ubuntu4.3+esm1) @ xenial2026-05-26ubuntu
ubuntulibklibc-dev (2.0.3-0ubuntu1.14.04.3+esm3) @ trusty2026-05-26ubuntu
ubuntursync (3.1.2-2.1ubuntu1.4) @ bionic2026-05-26ubuntu
ubuntursync (3.1.1-3ubuntu1.3+esm1) @ xenial2026-05-26ubuntu
ubuntumariadb-test (1:10.6.11-0ubuntu0.22.10.1) @ kinetic2026-05-26ubuntu
ubuntuzlib1g-dev (1:1.2.11.dfsg-2ubuntu7.1) @ impish2026-05-26ubuntu
redhatzlib-0:1.2.7-18.el7_7.12023-02-28redhat
redhatzlib-0:1.2.7-18.el7_6.12023-02-28redhat
redhatzlib-0:1.2.7-17.el7_4.12023-02-28redhat
redhatmingw-zlib-0:1.2.12-2.el92022-11-15redhat
redhatmingw-zlib-0:1.2.8-10.el82022-11-08redhat
redhatzlib2022-10-26redhat
redhatredhat-virtualization-host-0:4.3.23-20220622.0.el7_92022-07-01redhat
redhatredhat-virtualization-host-0:4.5.0-202205291010_8.62022-06-03redhat
redhatzlib-0:1.2.11-18.el8_42022-05-31redhat
redhatrsync-0:3.2.3-9.el9_0.12022-05-18redhat
redhatzlib-0:1.2.11-31.el9_0.12022-05-17redhat
redhatrsync-0:3.1.3-7.el8_2.12022-05-11redhat
redhatrsync-0:3.1.3-14.el8_6.22022-05-11redhat
redhatzlib-0:1.2.7-20.el7_92022-05-11redhat
redhatrsync-0:3.1.3-6.el8_1.12022-05-11redhat
redhatrsync-0:3.1.3-12.el8_4.12022-05-11redhat
redhatzlib-0:1.2.3-31.el6_102022-05-11redhat
redhatzlib-0:1.2.11-17.el8_22022-05-02redhat
redhatzlib-0:1.2.11-18.el8_52022-04-28redhat
redhatzlib-0:1.2.11-11.el8_1.12022-04-26redhat

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

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
nokogiri1.0.0 ... 1.9.1 (143 versions)1.13.4—

Weakness Classification(1)

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

Additional Vendor Advisories

(14)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 43× 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.

  1. 2026-07-22 14:05 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-20 17:04 UTCEPSS rescore
  4. 2026-07-20 17:04 UTCEPSS rescore
  5. 2026-07-19 02:26 UTCEPSS rescore
  6. 2026-07-19 02:26 UTCEPSS rescore
  7. 2026-07-17 19:29 UTCOSV refresh
  8. 2026-07-16 16:59 UTCEPSS rescore
  9. 2026-07-16 16:59 UTCEPSS rescore
  10. 2026-07-15 16:55 UTCEPSS rescore
  11. 2026-07-15 16:55 UTCEPSS rescore
  12. 2026-07-15 01:56 UTCEPSS rescore
  13. 2026-07-15 01:56 UTCEPSS rescore
  14. 2026-07-13 22:27 UTCEPSS rescore
  15. 2026-07-13 22:26 UTCEPSS rescore
  16. 2026-07-13 06:10 UTCEPSS rescore
  17. 2026-07-12 05:43 UTCEPSS rescore
  18. 2026-07-11 08:24 UTCEPSS rescore
  19. 2026-07-09 19:06 UTCEPSS rescore
  20. 2026-07-07 13:42 UTCEPSS rescore
  21. 2026-07-07 13:42 UTCEPSS rescore
  22. 2026-07-06 16:24 UTCEPSS rescore
  23. 2026-07-06 16:24 UTCEPSS rescore
  24. 2026-07-06 02:20 UTCEPSS rescore
  25. 2026-07-04 06:28 UTCEPSS rescore
Show 65 more
  1. 2026-07-04 06:28 UTCEPSS rescore
  2. 2026-07-02 16:54 UTCEPSS rescore
  3. 2026-07-01 15:03 UTCEPSS rescore
  4. 2026-07-01 15:03 UTCEPSS rescore
  5. 2026-06-30 23:20 UTCEPSS rescore
  6. 2026-06-30 23:19 UTCEPSS rescore
  7. 2026-06-29 17:23 UTCOSV refresh
  8. 2026-06-28 04:53 UTCEPSS rescore
  9. 2026-06-28 04:53 UTCEPSS rescore
  10. 2026-06-27 03:06 UTCEPSS rescore
  11. 2026-06-27 03:06 UTCEPSS rescore
  12. 2026-06-25 13:47 UTCEPSS rescore
  13. 2026-06-25 13:47 UTCEPSS rescore
  14. 2026-06-24 14:02 UTCEPSS rescore
  15. 2026-06-24 14:02 UTCEPSS rescore
  16. 2026-06-23 21:30 UTCEPSS rescore
  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-23 21:30 UTCEPSS rescore
  19. 2026-06-21 01:57 UTCEPSS rescore
  20. 2026-06-21 01:57 UTCEPSS rescore
  21. 2026-06-19 19:23 UTCEPSS rescore
  22. 2026-06-19 19:23 UTCEPSS rescore
  23. 2026-06-18 17:50 UTCEPSS rescore
  24. 2026-06-18 17:50 UTCEPSS rescore
  25. 2026-06-17 17:50 UTCEPSS rescore
  26. 2026-06-17 17:50 UTCEPSS rescore
  27. 2026-06-16 17:50 UTCEPSS rescore
  28. 2026-06-16 17:50 UTCEPSS rescore
  29. 2026-06-15 17:45 UTCEPSS rescore
  30. 2026-06-14 23:15 UTCEPSS rescore
  31. 2026-06-14 23:14 UTCEPSS rescore
  32. 2026-06-13 22:58 UTCEPSS rescore
  33. 2026-06-12 23:09 UTCEPSS rescore
  34. 2026-06-12 23:09 UTCEPSS rescore
  35. 2026-06-12 06:06 UTCOSV refresh
  36. 2026-06-11 13:57 UTCEPSS rescore
  37. 2026-06-10 22:16 UTCEPSS rescore
  38. 2026-06-10 13:19 UTCEPSS rescore
  39. 2026-06-08 14:14 UTCEPSS rescore
  40. 2026-06-08 14:14 UTCEPSS rescore
  41. 2026-06-07 15:22 UTCEPSS rescore
  42. 2026-06-07 15:22 UTCEPSS rescore
  43. 2026-06-06 13:45 UTCEPSS rescore
  44. 2026-06-06 13:45 UTCEPSS rescore
  45. 2026-06-05 22:45 UTCEPSS rescore
  46. 2026-06-05 22:45 UTCEPSS rescore
  47. 2026-06-05 06:08 UTCEPSS rescore
  48. 2026-06-05 06:08 UTCEPSS rescore
  49. 2026-06-04 13:10 UTCEPSS rescore
  50. 2026-06-02 20:11 UTCEPSS rescore
  51. 2026-06-02 20:11 UTCEPSS rescore
  52. 2026-06-01 13:50 UTCEPSS rescore
  53. 2026-06-01 13:50 UTCEPSS rescore
  54. 2026-05-31 22:29 UTCEPSS rescore
  55. 2026-05-29 13:41 UTCEPSS rescore
  56. 2026-05-28 13:42 UTCEPSS rescore
  57. 2026-05-28 13:42 UTCEPSS rescore
  58. 2026-05-27 13:38 UTCEPSS rescore
  59. 2026-05-27 13:38 UTCEPSS rescore
  60. 2026-05-26 13:42 UTCEPSS rescore
  61. 2026-05-26 13:42 UTCEPSS rescore
  62. 2026-05-26 07:17 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore
  64. 2026-05-26 01:04 UTCEG score recompute
  65. 2026-05-26 01:04 UTCVendor advisory

Frequently asked(5)

What is CVE-2018-25032?
CVE-2018-25032 is a high vulnerability published on March 25, 2022. zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.
When was CVE-2018-25032 disclosed?
CVE-2018-25032 was first published in the National Vulnerability Database on March 25, 2022, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-25032 actively exploited?
CVE-2018-25032 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-25032?
CVE-2018-25032 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2018-25032?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-25032, 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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