{"api_version":"1","generated_at":"2026-05-07T03:13:24+00:00","cve":"CVE-2018-18281","urls":{"html":"https://cve.report/CVE-2018-18281","api":"https://cve.report/api/cve/CVE-2018-18281.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2018-18281","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-18281"},"summary":{"title":"CVE-2018-18281","description":"Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2018-10-30 18:29:00","updated_at":"2020-08-24 17:37:00"},"problem_types":["CWE-459"],"metrics":[],"references":[{"url":"https://usn.ubuntu.com/3871-3/","name":"USN-3871-3","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3871-3: Linux kernel (AWS, GCP, KVM, OEM, Raspberry Pi 2) vulnerabilities | Ubuntu security notices | Ubuntu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1695","name":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1695","refsource":"MISC","tags":["Exploit","Patch","Third Party Advisory"],"title":"1695 - \n Linux: mremap() TLB flush too late with concurrent ftruncate() - \n \n project-zero -\n \n \n Monorail","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://access.redhat.com/errata/RHSA-2019:2029","name":"RHSA-2019:2029","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3832-1/","name":"USN-3832-1","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3832-1: Linux kernel (AWS) vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135","name":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135","refsource":"CONFIRM","tags":["Patch","Vendor Advisory"],"title":"","mime":"text/plain","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3835-1/","name":"USN-3835-1","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3835-1: Linux kernel vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html","name":"[debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update","refsource":"MLIST","tags":["Mailing List","Third Party Advisory"],"title":"[SECURITY] [DLA 1715-1] linux-4.9 security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16","name":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16","refsource":"CONFIRM","tags":["Patch","Vendor Advisory"],"title":"","mime":"text/plain","httpstatus":"200","archivestatus":"200"},{"url":"https://access.redhat.com/errata/RHSA-2019:2043","name":"RHSA-2019:2043","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html","name":"[debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update","refsource":"MLIST","tags":["Mailing List","Third Party Advisory"],"title":"[SECURITY] [DLA 1731-2] linux regression update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3880-1/","name":"USN-3880-1","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3880-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821","name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821","refsource":"CONFIRM","tags":["Patch","Vendor Advisory"],"title":"kernel/git/torvalds/linux.git - Linux kernel source tree","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3871-5/","name":"USN-3871-5","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3871-5: Linux kernel (Azure) vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3880-2/","name":"USN-3880-2","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3880-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3871-4/","name":"USN-3871-4","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3871-4: Linux kernel (HWE) vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://access.redhat.com/errata/RHSA-2020:0100","name":"RHSA-2020:0100","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/105761","name":"105761","refsource":"BID","tags":["Third Party Advisory","VDB Entry"],"title":"Linux Kernel CVE-2018-18281 Local Security Bypass Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html","name":"http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html","refsource":"MISC","tags":["Patch","Third Party Advisory","VDB Entry"],"title":"Linux mremap() TLB Flush Too Late ≈ Packet Storm","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.openwall.com/lists/oss-security/2018/10/29/5","name":"[oss-security] 20181029 Linux kernel: TLB flush happens too late on mremap (CVE-2018-18281; fixed in 4.9.135, 4.14.78, 4.18.16, 4.19)","refsource":"MLIST","tags":["Mailing List","Patch","Third Party Advisory"],"title":"oss-security - Linux kernel: TLB flush happens too late on mremap (CVE-2018-18281;\n fixed in 4.9.135, 4.14.78, 4.18.16, 4.19)","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html","name":"[debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update","refsource":"MLIST","tags":["Mailing List","Third Party Advisory"],"title":"[SECURITY] [DLA 1731-1] linux security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/106503","name":"106503","refsource":"BID","tags":["Third Party Advisory","VDB Entry"],"title":"Linux Kernel Components Multiple Security Vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://access.redhat.com/errata/RHSA-2020:0179","name":"RHSA-2020:0179","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://usn.ubuntu.com/3871-1/","name":"USN-3871-1","refsource":"UBUNTU","tags":["Third Party Advisory"],"title":"USN-3871-1: Linux kernel vulnerabilities | Ubuntu security notices","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78","name":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78","refsource":"CONFIRM","tags":["Patch","Vendor Advisory"],"title":"","mime":"text/plain","httpstatus":"200","archivestatus":"200"},{"url":"https://access.redhat.com/errata/RHSA-2020:0036","name":"RHSA-2020:0036","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://access.redhat.com/errata/RHSA-2020:0103","name":"RHSA-2020:0103","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://access.redhat.com/errata/RHSA-2019:0831","name":"RHSA-2019:0831","refsource":"REDHAT","tags":[],"title":"Red Hat Customer Portal","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-18281","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-18281","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"12.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"esm","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"14.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"16.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"18.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"18.10","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"12.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"esm","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"14.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"16.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"18.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"18.10","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2018","cve_id":"18281","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2018-18281","qid":"376774","title":"F5 BIG-IP Application Security Manager (ASM), Local Traffic Manager (LTM), Access Policy Manager (APM) Linux kernel Vulnerability cve-2018-18281 (K36462841)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2018-18281","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html"},{"name":"USN-3835-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3835-1/"},{"name":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16","refsource":"CONFIRM","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16"},{"name":"USN-3880-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3880-1/"},{"name":"USN-3871-5","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3871-5/"},{"name":"USN-3871-4","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3871-4/"},{"name":"[oss-security] 20181029 Linux kernel: TLB flush happens too late on mremap (CVE-2018-18281; fixed in 4.9.135, 4.14.78, 4.18.16, 4.19)","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2018/10/29/5"},{"name":"USN-3880-2","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3880-2/"},{"name":"USN-3832-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3832-1/"},{"name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821","refsource":"CONFIRM","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821"},{"name":"105761","refsource":"BID","url":"http://www.securityfocus.com/bid/105761"},{"name":"USN-3871-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3871-1/"},{"name":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78","refsource":"CONFIRM","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78"},{"name":"106503","refsource":"BID","url":"http://www.securityfocus.com/bid/106503"},{"name":"USN-3871-3","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3871-3/"},{"name":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1695","refsource":"MISC","url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1695"},{"refsource":"MLIST","name":"[debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update","url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html"},{"name":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135","refsource":"CONFIRM","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135"},{"refsource":"MLIST","name":"[debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update","url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update","url":"https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html"},{"refsource":"REDHAT","name":"RHSA-2019:0831","url":"https://access.redhat.com/errata/RHSA-2019:0831"},{"refsource":"REDHAT","name":"RHSA-2019:2043","url":"https://access.redhat.com/errata/RHSA-2019:2043"},{"refsource":"REDHAT","name":"RHSA-2019:2029","url":"https://access.redhat.com/errata/RHSA-2019:2029"},{"refsource":"REDHAT","name":"RHSA-2020:0036","url":"https://access.redhat.com/errata/RHSA-2020:0036"},{"refsource":"REDHAT","name":"RHSA-2020:0100","url":"https://access.redhat.com/errata/RHSA-2020:0100"},{"refsource":"REDHAT","name":"RHSA-2020:0103","url":"https://access.redhat.com/errata/RHSA-2020:0103"},{"refsource":"REDHAT","name":"RHSA-2020:0179","url":"https://access.redhat.com/errata/RHSA-2020:0179"}]}},"nvd":{"publishedDate":"2018-10-30 18:29:00","lastModifiedDate":"2020-08-24 17:37:00","problem_types":["CWE-459"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.0","vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:P/I:P/A:P","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":4.6},"severity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.136","versionEndExcluding":"4.14.78","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"4.9.135","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18.17","versionEndExcluding":"4.19","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.79","versionEndExcluding":"4.18.16","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2018","CveId":"18281","Ordinal":"135198","Title":"CVE-2018-18281","CVE":"CVE-2018-18281","Year":"2018"},"notes":[{"CveYear":"2018","CveId":"18281","Ordinal":"1","NoteData":"Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.","Type":"Description","Title":null},{"CveYear":"2018","CveId":"18281","Ordinal":"2","NoteData":"2018-10-30","Type":"Other","Title":"Published"},{"CveYear":"2018","CveId":"18281","Ordinal":"3","NoteData":"2020-01-21","Type":"Other","Title":"Modified"}]}}}