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Vulnerability record · CVE-2002-0059 · published 15 March 2002

CVE-2002-0059: Zlib double free vulnerability

Zlib · Zlib

The decompression algorithm in zlib 1.1.3 and earlier, as used in many different utilities and packages, causes inflateEnd to release certain memory more than once (a "double free"), which may allow local and remote attackers to execute arbitrary code via a block of malformed compression data.

9.8 CVSS 3.1 Critical EPSS 9.7% · top 4.7% CWE-415 · Double free
9.8CVSS 3.1 base score, v2 7.5
9.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
32References
16 Jun 2026Last modified by NVD

Description

The decompression algorithm in zlib 1.1.3 and earlier, as used in many different utilities and packages, causes inflateEnd to release certain memory more than once (a "double free"), which may allow local and remote attackers to execute arbitrary code via a block of malformed compression data.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-015.1.txt Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000469 Broken Link
http://frontal2.mandriva.com/security/advisories?name=MDKSA-2002:022 Broken Link
http://www.caldera.com/support/security/advisories/CSSA-2002-014.1.txt Broken Link
http://www.cert.org/advisories/CA-2002-07.html Third Party AdvisoryUS Government Resource
http://www.debian.org/security/2002/dsa-122 Broken Link
http://www.kb.cert.org/vuls/id/368819 Third Party AdvisoryUS Government Resource
http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-023.php Broken LinkPatchVendor Advisory
http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-024.php3 Broken Link
http://www.redhat.com/support/errata/RHSA-2002-026.html Broken LinkPatchVendor Advisory
http://www.redhat.com/support/errata/RHSA-2002-027.html Broken LinkPatchVendor Advisory
http://www.securityfocus.com/bid/4267 Broken LinkThird Party AdvisoryVDB Entry
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTL0204-030 Broken Link
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTL0204-036 Broken Link
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTL0204-037 Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/8427 Third Party AdvisoryVDB Entry
ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-015.1.txt Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000469 Broken Link
http://frontal2.mandriva.com/security/advisories?name=MDKSA-2002:022 Broken Link
http://www.caldera.com/support/security/advisories/CSSA-2002-014.1.txt Broken Link
http://www.cert.org/advisories/CA-2002-07.html Third Party AdvisoryUS Government Resource
http://www.debian.org/security/2002/dsa-122 Broken Link
http://www.kb.cert.org/vuls/id/368819 Third Party AdvisoryUS Government Resource
http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-023.php Broken LinkPatchVendor Advisory
http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-024.php3 Broken Link
http://www.redhat.com/support/errata/RHSA-2002-026.html Broken LinkPatchVendor Advisory
http://www.redhat.com/support/errata/RHSA-2002-027.html Broken LinkPatchVendor Advisory
http://www.securityfocus.com/bid/4267 Broken LinkThird Party AdvisoryVDB Entry
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTL0204-030 Broken Link
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTL0204-036 Broken Link
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBTL0204-037 Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/8427 Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-0059), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.