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Linux Distros Unpatched Vulnerability : CVE-2015-2877

🗓️ 04 Mar 2025 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 10 Views

Linux unpatched vulnerability CVE-2015-2877 affects Kernel Samepage Merging, risking ASLR defeat.

Related
Refs
Code
ReporterTitlePublishedViews
Family
CNVD
Kernel Virtual Machine Memory Corruption Vulnerability
14 Aug 201500:00
cnvd
CVE
CVE-2015-2877
3 Mar 201711:00
cve
Cvelist
CVE-2015-2877
3 Mar 201711:00
cvelist
Debian CVE
CVE-2015-2877
3 Mar 201711:00
debiancve
Tenable Nessus
EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1476)
13 May 201900:00
nessus
Tenable Nessus
RHEL 4 : kernel (Unpatched Vulnerability)
3 Jun 202400:00
nessus
Tenable Nessus
RHEL 5 : kernel (Unpatched Vulnerability)
3 Jun 202400:00
nessus
Tenable Nessus
RHEL 6 : kernel (Unpatched Vulnerability)
3 Jun 202400:00
nessus
Tenable Nessus
RHEL 7 : kernel (Unpatched Vulnerability)
3 Jun 202400:00
nessus
NVD
CVE-2015-2877
3 Mar 201711:59
nvd
Rows per page
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# (C) Tenable, Inc.
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  - Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-
    timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS
    instances via a Cross-VM ASL INtrospection (CAIN) attack. NOTE: the vendor states Basically if you care
    about this attack vector, disable deduplication. Share-until-written approaches for memory conservation
    among mutually untrusting tenants are inherently detectable for information disclosure, and can be
    classified as potentially misunderstood behaviors rather than vulnerabilities (CVE-2015-2877)

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include('linux_unpatched.inc');

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    "constraints": [
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  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "kernel"},
          {"reference": "kernel-abi-whitelists"},
          {"reference": "kernel-bootwrapper"},
          {"reference": "kernel-debug"},
          {"reference": "kernel-debug-devel"},
          {"reference": "kernel-devel"},
          {"reference": "kernel-doc"},
          {"reference": "kernel-firmware"},
          {"reference": "kernel-headers"},
          {"reference": "kernel-kdump"},
          {"reference": "kernel-kdump-devel"},
          {"reference": "perf"},
          {"reference": "python-perf"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "bpftool"},
          {"reference": "kernel"},
          {"reference": "kernel-abi-whitelists"},
          {"reference": "kernel-bootwrapper"},
          {"reference": "kernel-debug"},
          {"reference": "kernel-debug-devel"},
          {"reference": "kernel-devel"},
          {"reference": "kernel-doc"},
          {"reference": "kernel-headers"},
          {"reference": "kernel-kdump"},
          {"reference": "kernel-kdump-devel"},
          {"reference": "kernel-tools"},
          {"reference": "kernel-tools-libs"},
          {"reference": "kernel-tools-libs-devel"},
          {"reference": "perf"},
          {"reference": "python-perf"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "bpftool"},
          {"reference": "kernel"},
          {"reference": "kernel-abi-whitelists"},
          {"reference": "kernel-bootwrapper"},
          {"reference": "kernel-debug"},
          {"reference": "kernel-debug-devel"},
          {"reference": "kernel-devel"},
          {"reference": "kernel-doc"},
          {"reference": "kernel-headers"},
          {"reference": "kernel-kdump"},
          {"reference": "kernel-kdump-devel"},
          {"reference": "kernel-tools"},
          {"reference": "kernel-tools-libs"},
          {"reference": "kernel-tools-libs-devel"},
          {"reference": "perf"},
          {"reference": "python-perf"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_NOTE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}

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27 May 2026 00:00Current
6.7Medium risk
Vulners AI Score6.7
CVSS 22.1
CVSS 3.13.3
EPSS0.00112
10