{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-22184", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-01-06T16:47:17.182Z", "datePublished": "2026-01-07T20:25:19.892Z", "dateUpdated": "2026-06-30T12:06:47.806Z" }, "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "zlib", "repo": "https://github.com/madler/zlib", "vendor": "zlib software", "versions": [ { "lessThanOrEqual": "1.3.1.2", "status": "affected", "version": "0", "versionType": "custom" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.3.1.2" } ] } ] } ], "credits": [ { "lang": "en", "type": "finder", "value": "Ron Edgerson" } ], "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.

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The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer." } ], "metrics": [ { "cvssV4_0": { "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 4.6, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-05-14T02:09:05.196Z" }, "references": [ { "tags": [ "technical-description", "exploit" ], "url": "https://seclists.org/fulldisclosure/2026/Jan/3" }, { "tags": [ "product" ], "url": "https://zlib.net/" }, { "tags": [ "product" ], "url": "https://github.com/madler/zlib" }, { "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname" } ], "source": { "discovery": "UNKNOWN" }, "tags": [ "disputed" ], "title": "zlib <= 1.3.1.2 untgz Global Buffer Overflow in TGZfname()", "x_generator": { "engine": "Vulnogram 0.5.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-01-07T21:17:54.918396Z", "id": "CVE-2026-22184", "options": [ { "Exploitation": "poc" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-07T21:18:06.699Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-01-12T08:01:52.956Z" }, "references": [ { "url": "https://github.com/madler/zlib/issues/1142" } ], "title": "CVE Program Container", "x_generator": { "engine": "ADPogram 0.0.1" } }, { "affected": [ { "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "affected", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openjdk:1.8" ], "defaultStatus": "unaffected", "product": "Red Hat build of OpenJDK 1.8", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openjdk_els:11" ], "defaultStatus": "unaffected", "product": "Red Hat build of OpenJDK 11 ELS", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openjdk:17" ], "defaultStatus": "unaffected", "product": "Red Hat build of OpenJDK 17", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openjdk:21" ], "defaultStatus": "unaffected", "product": "Red Hat build of OpenJDK 21", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openjdk:25" ], "defaultStatus": "unaffected", "product": "Red Hat build of OpenJDK 25", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:6" ], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat" }, { "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:jboss_core_services:1" ], "defaultStatus": "unaffected", "product": "Red Hat JBoss Core Services", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openshift:4" ], "defaultStatus": "unaffected", "product": "Red Hat OpenShift Container Platform 4", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openstack:16.2" ], "defaultStatus": "unaffected", "product": "Red Hat OpenStack Platform 16.2", "vendor": "Red Hat" }, { "cpes": [ "cpe:/a:redhat:openstack:17.1" ], "defaultStatus": "unaffected", "product": "Red Hat OpenStack Platform 17.1", "vendor": "Red Hat" } ], "datePublic": "2026-01-07T20:25:19.892Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in zlib. A global buffer overflow vulnerability exists in the `untgz` utility, specifically within the `TGZfname()` function. This flaw allows an attacker to provide an archive name longer than 1024 bytes, leading to an out-of-bounds write. This can result in memory corruption, denial of service, and potentially arbitrary code execution on the affected system." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-120", "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-22184" }, { "name": "RHBZ#2427688", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427688" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22184.json" } ], "timeline": [ { "lang": "en", "time": "2026-01-07T21:02:32.602Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-01-07T20:25:19.892Z", "value": "Made public." } ], "title": "zlib: zlib: Arbitrary code execution via buffer overflow in untgz utility", "workarounds": [ { "lang": "en", "value": "To mitigate this vulnerability, avoid using the `untgz` utility with untrusted archive names or from untrusted sources. System administrators should ensure that any automated processes or user interactions involving `untgz` validate the length of archive names to prevent triggering the buffer overflow. If the `untgz` utility is not essential for system operation, consider restricting its execution permissions or removing the package that provides it, if applicable." } ], "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-06-30T12:06:47.806Z" } } ] } }