CVE-2026-124745

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-124745", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-11-09T11:36:29.479Z", "datePublished": "2026-11-11T12:29:18.382Z", "dateUpdated": "2026-11-13T04:05:21.468Z"}, "containers": {"cna": {"title": "Busybox: tar deferred hardlink target resolved through a deferred symlink escapes the extraction directory", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Hardened Images", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "busybox-main", "defaultStatus": "affected", "versions": [{"version": "1.37.0-9.4.hum1", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:hummingbird:1"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "busybox", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:rhel_els:6"]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:81391", "name": "RHSA-2026:81391", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2026-124745", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2571637", "name": "RHBZ#2571637", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-11-11T09:15:15.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-59", "description": "Improper Link Resolution Before File Access", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-59: Improper Link Resolution Before File Access", "workarounds": [{"lang": "en", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}], "timeline": [{"lang": "en", "time": "2026-10-25T13:40:37.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-11-11T09:15:15.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Duc Anh Luu for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-13T04:05:21.468Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-12T19:35:06.918826Z", "id": "CVE-2026-124745", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-11-12T19:35:17.039Z"}}]}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:hummingbird:1"], "defaultStatus": "affected", "packageName": "busybox-main", "product": "Red Hat Hardened Images", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1.37.0-9.4.hum1", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:rhel_els:6"], "defaultStatus": "unaffected", "packageName": "busybox", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system."}], "id": "CVE-2026-124745", "lastModified": "2026-11-13T05:18:16.780", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.2, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-124745", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-11-12T19:35:06.918826Z", "version": "2.0.3"}}]}, "published": "2026-11-11T13:17:20.043", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:81391"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-124745"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2571637"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Duc Anh Luu for reporting this issue.", "bugzilla": {"description": "busybox: tar deferred hardlink target resolved through a deferred symlink escapes the extraction directory", "id": "2571637", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2571637"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-59", "details": ["A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-124745", "package_state": [{"cpe": "cpe:/o:redhat:rhel_els:6", "fix_state": "Not affected", "package_name": "busybox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "busybox", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-11-11T09:15:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-124745\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-124745"], "statement": "This vulnerability is rated as Moderate severity because exploitation requires a user or automated process to extract a specially crafted archive, and achieving unauthorized file modification typically requires subsequent extraction operations. In Red Hat environments, GNU tar is standard, and BusyBox is primarily utilized in constrained footprints like initramfs or recovery images rather than general-purpose extraction workflows. Consequently, exposure across common deployment scenarios is minimal.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "busybox", "vendor": "busybox"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 6", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "red_hat"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 6", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Hardened Images", "source": "cna", "vendor": "Red Hat"}, "product": "hardened_images", "vendor": "redhat"}], "created": "2026-11-11T23:30:19.363047+00:00", "updated": "2026-11-12T21:45:09.149595+00:00", "vendors": ["busybox", "busybox$PRODUCT$busybox", "red_hat", "red_hat$PRODUCT$enterprise_linux", "redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$hardened_images"]}