Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2018-25032

CVE-2018-25032HIGH

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .5173   98.9     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Mar 25  Reserved by mitre
  Mar 25  Published (CNA: mitre)
  Oct 14  EXPLOIT PUBLISHED — CVE-2018-25032. Public exploit reference added.

CWE-787 · CNA: mitre · CVSS v3.1 · 35 references · NVD status: Modified

Description

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

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
March 25, 2022	Reserved	Reserved by mitre
March 25, 2022	Published	Published (CNA: mitre)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2018-25032. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-787

References (35)

http://seclists.org/fulldisclosure/2022/May/33 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/May/35 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/May/38 [Mailing List, Third Party Advisory]
http://www.openwall.com/lists/oss-security/2022/03/25/2 [Mailing List, Third Party Advisory]
http://www.openwall.com/lists/oss-security/2022/03/26/1 [Exploit, Mailing List, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-333517.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-419740.html
https://cert-portal.siemens.com/productcert/html/ssa-470355.html
https://cert-portal.siemens.com/productcert/html/ssa-565386.html
https://cert-portal.siemens.com/productcert/html/ssa-942865.html
https://cert-portal.siemens.com/productcert/pdf/ssa-333517.pdf [Third Party Advisory]
https://github.com/madler/zlib/commit/5c44459c3b28a9bd3283aaceab7c615f8020c531 [Patch, Third Party Advisory]
https://github.com/madler/zlib/compare/v1.2.11...v1.2.12 [Patch, Third Party Advisory]
https://github.com/madler/zlib/issues/605 [Issue Tracking, Patch, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/04/msg00000.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/05/msg00008.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/09/msg00023.html [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCZFIJBJTZ7CL5QXBFKTQ22Q26VINRUF/ [Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DF62MVMH3QUGMBDCB3DY2ERQ6EBHTADB/ [Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZZPTWRYQULAOL3AW7RZJNVZ2UONXCV4/ [Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NS2D2GFPFGOJUL4WQ3DUAY7HF4VWQ77F/ [Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VOKNP2L734AEL47NRYGVZIKEFOUBQY5Y/ [Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOKFMSNQ5D5WGMALBNBXU3GE442V74WU/ [Third Party Advisory]
https://security.gentoo.org/glsa/202210-42 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20220526-0009/ [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20220729-0004/ [Third Party Advisory]
https://support.apple.com/kb/HT213255 [Third Party Advisory]
https://support.apple.com/kb/HT213256 [Third Party Advisory]
https://support.apple.com/kb/HT213257 [Third Party Advisory]
https://www.debian.org/security/2022/dsa-5111 [Patch, Third Party Advisory]
https://www.openwall.com/lists/oss-security/2022/03/24/1 [Mailing List, Third Party Advisory]
https://www.openwall.com/lists/oss-security/2022/03/28/1 [Exploit, Mailing List, Third Party Advisory]
https://www.openwall.com/lists/oss-security/2022/03/28/3 [Mailing List, Third Party Advisory]
https://www.oracle.com/security-alerts/cpujul2022.html [Patch, Third Party Advisory]

Authoritative record: CVE-2018-25032 at cve.org

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2018-25032 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.