{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2018-18281",
        "STATE": "PUBLIC"
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        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
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                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
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    "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."
            }
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    "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"
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                "name": "USN-3835-1",
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                "url": "https://usn.ubuntu.com/3835-1/"
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                "name": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16",
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                "url": "https://usn.ubuntu.com/3871-5/"
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                "url": "https://usn.ubuntu.com/3871-4/"
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                "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)",
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                "url": "http://www.openwall.com/lists/oss-security/2018/10/29/5"
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                "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821",
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                "url": "https://usn.ubuntu.com/3871-3/"
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                "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"
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            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update",
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                "name": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135",
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                "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135"
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            {
                "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"
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            {
                "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"
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                "refsource": "REDHAT",
                "name": "RHSA-2019:0831",
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                "name": "RHSA-2019:2043",
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                "refsource": "REDHAT",
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}