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CVE-2023-3640

🗓️ 24 Jul 2023 15:19:29Reported by redhatType 
cve
 cve🔗 web.nvd.nist.gov👁 212 Views🌐 WEB

A possible unauthorized memory access flaw in Linux kernel's cpu_entry_area mapping of X86 CPU data to memory, allowing local user to guess the location of important data

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
GithubExploit		Exploit for Observable Discrepancy in Linux Linux_Kernel
20 Jun 202306:21
–githubexploit
Chainguard		CVE-2023-3640 vulnerabilities
9 Jan 202619:17
–cgr
Circl		CVE-2023-3640
12 Jul 202317:29
–circl
CNNVD		Linux kernel 安全漏洞
24 Jul 202300:00
–cnnvd
Cvelist		CVE-2023-3640 Kernel: x86/mm: a per-cpu entry area leak was identified through the init_cea_offsets function when prefetchnta and prefetcht2 instructions being used for the per-cpu entry area mapping to the user space
24 Jul 202315:19
–cvelist
Debian CVE		CVE-2023-3640
24 Jul 202315:19
–debiancve
EUVD		EUVD-2023-44284
3 Oct 202520:07
–euvd
NVD		CVE-2023-3640
24 Jul 202316:15
–nvd
OSV		CGA-FWWG-5XV9-V2QJ
7 Jan 202613:00
–osv
OSV		CVE-2023-3640
24 Jul 202316:15
–osv
Rows per page
NVD
Node
linuxlinux_kernelMatch-
Node
redhatenterprise_linuxMatch8.0
OR
redhatenterprise_linuxMatch9.0
[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:5.14.0-362.8.1.el9_3",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:9::realtime",
      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::appstream",
      "cpe:/a:redhat:enterprise_linux:9::nfv",
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:5.14.0-362.8.1.el9_3",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:9::realtime",
      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::appstream",
      "cpe:/a:redhat:enterprise_linux:9::nfv",
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel-rt",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel-rt",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel-rt",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  }
]
ParameterPositionPathDescriptionCWE
0x55path/dev/sevenKernel exploit vector using /dev/seven with ioctl-based leakage/ROP chain setup (ret2hbp) to escalate privileges.CWE-203
0x5555path/dev/sevenKernel exploit vector using /dev/seven with ioctl-based leakage/ROP chain setup (ret2hbp) to escalate privileges.CWE-203

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14 Nov 2025 14:20Current
6.7Medium risk
Vulners AI Score6.7
CVSS 3.17 - 7.8
EPSS0.00166
SSVC
CWE-203
cve-2023-3640linux kernelunauthorized memory accesscpu data mappingx86memory vulnerabilityprivilege escalation
212