CVE-2017-15126

{"containers": {"cna": {"affected": [{"product": "Linux Kernel before 4.13.6", "vendor": "n/a", "versions": [{"status": "affected", "version": "Linux Kernel before 4.13.6"}]}], "datePublic": "2018-01-14T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put()."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-119", "description": "CWE-119", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2018-05-06T09:57:01.000Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"name": "102516", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/102516"}, {"tags": ["x_refsource_MISC"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252"}, {"tags": ["x_refsource_MISC"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481"}, {"name": "RHSA-2018:1062", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2018:1062"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252"}, {"name": "RHSA-2018:0676", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2018:0676"}, {"tags": ["x_refsource_MISC"], "url": "https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6"}, {"tags": ["x_refsource_MISC"], "url": "https://access.redhat.com/security/cve/CVE-2017-15126"}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T19:50:16.412Z"}, "title": "CVE Program Container", "references": [{"name": "102516", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/102516"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481"}, {"name": "RHSA-2018:1062", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2018:1062"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252"}, {"name": "RHSA-2018:0676", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2018:0676"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://access.redhat.com/security/cve/CVE-2017-15126"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2017-15126", "datePublished": "2018-01-14T06:00:00.000Z", "dateReserved": "2017-10-08T00:00:00.000Z", "dateUpdated": "2024-08-05T19:50:16.412Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Linux Kernel before 4.13.6", "vendor": "n/a", "versions": [{"status": "affected", "version": "Linux Kernel before 4.13.6"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6AA05A17-8B2B-40D5-A8FD-3B328291D06B", "versionEndExcluding": "4.13.6", "versionStartIncluding": "4.11", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put()."}, {"lang": "es", "value": "Se ha encontrado un fallo de uso de memoria previamente liberada en fs/userfaultfd.c en el kernel de Linux en versiones anteriores a la 4.13.6. El problema se relaciona con la gesti\u00f3n del error de bifurcaci\u00f3n al gestionar mensajes de evento. El error al bifurcar correctamente puede llevar a una situaci\u00f3n en la que un evento fork se eliminar\u00e1 de una lista ya liberada de eventos con userfaultfd_ctx_put()."}], "id": "CVE-2017-15126", "lastModified": "2026-06-17T01:07:17.680", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 9.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-01-14T06:29:00.217", "references": [{"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/102516"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:0676"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:1062"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2017-15126"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/102516"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:0676"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:1062"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2017-15126"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Andrea Arcangeli (Red Hat Engineering).", "affected_release": [{"advisory": "RHSA-2018:0676", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-862.rt56.804.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-04-10T00:00:00Z"}, {"advisory": "RHSA-2018:1062", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-862.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-04-10T00:00:00Z"}], "bugzilla": {"description": "kernel: Use-after-free in userfaultfd_event_wait_completion function in userfaultfd.c", "id": "1523481", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-119", "details": ["A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().", "A flaw was found in the Linux kernel's handling of fork failure when dealing with event messages in the userfaultfd code. Failure to fork correctly can create a fork event that will be removed from an already freed list of events."], "name": "CVE-2017-15126", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2017-12-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-15126\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-15126"], "statement": "This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6.\nThis issue affects the Linux kernel packages as shipped with Red Hat\nEnterprise Linux 7, realtime, MRG-2 prior to version kernel-3.10.0-781.\nThe kernel-alt package already as shipped contains this fix.", "threat_severity": "Moderate"}

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