CVE-2018-25032

HIGHNVD 7.57.5—Elevated

7.5

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: 25.4%
KEV: Not listed

Published

March 25, 2022

Last Modified

August 21, 2025

References (58)

Vendor Advisories for CVE-2018-25032(1)

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

CVE-2018-25032
Microsoft Security Response Center (MSRC)
CVE-2018-25032

Patch Availability(27)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libklibc-dev (2.0.13-4ubuntu0.1) @ noble	2026-05-26	ubuntu
ubuntu	zlib1g-dev (1:1.2.8.dfsg-2ubuntu4.3+esm1) @ xenial	2026-05-26	ubuntu
ubuntu	libklibc-dev (2.0.3-0ubuntu1.14.04.3+esm3) @ trusty	2026-05-26	ubuntu
ubuntu	rsync (3.1.2-2.1ubuntu1.4) @ bionic	2026-05-26	ubuntu
ubuntu	rsync (3.1.1-3ubuntu1.3+esm1) @ xenial	2026-05-26	ubuntu
ubuntu	mariadb-test (1:10.6.11-0ubuntu0.22.10.1) @ kinetic	2026-05-26	ubuntu
ubuntu	zlib1g-dev (1:1.2.11.dfsg-2ubuntu7.1) @ impish	2026-05-26	ubuntu
redhat	zlib-0:1.2.7-18.el7_7.1	2023-02-28	redhat
redhat	zlib-0:1.2.7-18.el7_6.1	2023-02-28	redhat
redhat	zlib-0:1.2.7-17.el7_4.1	2023-02-28	redhat
redhat	mingw-zlib-0:1.2.12-2.el9	2022-11-15	redhat
redhat	mingw-zlib-0:1.2.8-10.el8	2022-11-08	redhat
redhat	zlib	2022-10-26	redhat
redhat	redhat-virtualization-host-0:4.3.23-20220622.0.el7_9	2022-07-01	redhat
redhat	redhat-virtualization-host-0:4.5.0-202205291010_8.6	2022-06-03	redhat
redhat	zlib-0:1.2.11-18.el8_4	2022-05-31	redhat
redhat	rsync-0:3.2.3-9.el9_0.1	2022-05-18	redhat
redhat	zlib-0:1.2.11-31.el9_0.1	2022-05-17	redhat
redhat	rsync-0:3.1.3-7.el8_2.1	2022-05-11	redhat
redhat	rsync-0:3.1.3-14.el8_6.2	2022-05-11	redhat
redhat	zlib-0:1.2.7-20.el7_9	2022-05-11	redhat
redhat	rsync-0:3.1.3-6.el8_1.1	2022-05-11	redhat
redhat	rsync-0:3.1.3-12.el8_4.1	2022-05-11	redhat
redhat	zlib-0:1.2.3-31.el6_10	2022-05-11	redhat
redhat	zlib-0:1.2.11-17.el8_2	2022-05-02	redhat
redhat	zlib-0:1.2.11-18.el8_5	2022-04-28	redhat
redhat	zlib-0:1.2.11-11.el8_1.1	2022-04-26	redhat

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)

Package	Vulnerable range	Fixed in	Dependents
nokogiri	1.0.0 ... 1.9.1 (143 versions)	1.13.4	—

Weakness Classification(1)

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

CWE-787Out-of-bounds Write

Additional Vendor Advisories

(24)

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 8× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 01:04 UTCEG score recompute
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 August 21, 2025. 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 25.4% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-25032

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CVE-2018-25032

Published

Last Modified

References (58)

Vendor Advisories for CVE-2018-25032(1)

Patch Availability(27)

Affected Packages

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-25032?

Same vendor

Same CWE

CVE-2018-25032

📅 Published

🔄 Last Modified

🔗 References (58)

📣 Vendor Advisories for CVE-2018-25032(1)

Patch Availability(27)

Affected Packages

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-25032?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (58)

Vendor Advisories for CVE-2018-25032(1)

Frequently asked(5)

Related CVEs(same vendor + same CWE)