| Reporter | Title | Published | Views | Family All 83 |
|---|---|---|---|---|
| Transient Execution of Non-canonical Accesses | 10 Aug 202100:00 | – | amd | |
| The vulnerability of the arch/x86 kernel component of the Linux operating system, which allows a hacker to gain access to confidential data | 3 Jul 202500:00 | – | bdu_fstec | |
| CVE-2020-12965 | 7 Dec 202301:06 | – | circl | |
| AMD CPUs 注入漏洞 | 14 Oct 202100:00 | – | cnnvd | |
| Linux kernel 安全漏洞 | 5 Nov 202400:00 | – | cnnvd | |
| CVE-2020-12965 | 4 Feb 202222:29 | – | cve | |
| CVE-2024-50102 | 5 Nov 202417:10 | – | cve | |
| CVE-2020-12965 | 4 Feb 202222:29 | – | cvelist | |
| CVE-2024-50102 x86: fix user address masking non-canonical speculation issue | 5 Nov 202417:10 | – | cvelist | |
| CVE-2024-50102 | 5 Nov 202417:10 | – | debiancve |
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
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script_id(231549);
script_version("1.16");
script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/21");
script_cve_id("CVE-2024-50102");
script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2024-50102");
script_set_attribute(attribute:"synopsis", value:
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script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.
- x86: fix user address masking non-canonical speculation issue It turns out that AMD has a Meltdown
Lite(tm) issue with non-canonical accesses in kernel space. And so using just the high bit to decide
whether an access is in user space or kernel space ends up with the good old leak speculative data if
you have the right gadget using the result: CVE-2020-12965 Transient Execution of Non-Canonical Accesses
Now, the kernel surrounds the access with a STAC/CLAC pair, and those instructions end up serializing
execution on older Zen architectures, which closes the speculation window. But that was true only up until
Zen 5, which renames the AC bit [1]. That improves performance of STAC/CLAC a lot, but also means that the
speculation window is now open. Note that this affects not just the new address masking, but also the
regular valid_user_address() check used by access_ok(), and the asm version of the sign bit check in the
get_user() helpers. It does not affect put_user() or clear_user() variants, since there's no speculative
result to be used in a gadget for those operations. (CVE-2024-50102)
Note that Nessus relies on the presence of the package as reported by the vendor.");
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script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Misc.");
script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
script_require_ports("Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.04");
exit(0);
}
if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);
include('linux_unpatched.inc');
var distro_constraints_array = {
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"constraints": [
{
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"pkgs": [
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"constraints": [
{
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{"reference": "linux-ibm-6.8"},
{"reference": "linux-image-5.15.0"},
{"reference": "linux-image-unsigned-5.17.0"},
{"reference": "linux-intel-iot-realtime"},
{"reference": "linux-lowlatency-hwe-5.19"},
{"reference": "linux-lowlatency-hwe-6.2"},
{"reference": "linux-lowlatency-hwe-6.5"},
{"reference": "linux-lowlatency-hwe-6.8"},
{"reference": "linux-modules-5.15.0"},
{"reference": "linux-modules-5.17.0"},
{"reference": "linux-modules-extra-5.15.0"},
{"reference": "linux-modules-extra-5.17.0"},
{"reference": "linux-nvidia-6.2"},
{"reference": "linux-nvidia-6.5"},
{"reference": "linux-nvidia-6.8"},
{"reference": "linux-oem-5.17-headers-5.17.0"},
{"reference": "linux-oem-5.17-tools-5.17.0"},
{"reference": "linux-oem-5.17-tools-host"},
{"reference": "linux-oem-6.0"},
{"reference": "linux-oem-6.1"},
{"reference": "linux-oem-6.5"},
{"reference": "linux-oracle-6.5"},
{"reference": "linux-oracle-6.8"},
{"reference": "linux-realtime"},
{"reference": "linux-riscv-5.19"},
{"reference": "linux-riscv-6.5"},
{"reference": "linux-riscv-6.8"},
{"reference": "linux-riscv-headers-5.15.0"},
{"reference": "linux-riscv-tools-5.15.0"},
{"reference": "linux-starfive-5.19"},
{"reference": "linux-starfive-6.2"},
{"reference": "linux-starfive-6.5"},
{"reference": "linux-tools-5.15.0"},
{"reference": "linux-tools-5.17.0"}
]
}
]
},
"Ubuntu Linux-24.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "24.04",
"pkgs": [
{"reference": "linux-aws-cloud-tools-6.8.0"},
{"reference": "linux-aws-headers-6.8.0"},
{"reference": "linux-aws-tools-6.8.0"},
{"reference": "linux-azure-cloud-tools-6.8.0"},
{"reference": "linux-azure-fde"},
{"reference": "linux-azure-headers-6.8.0"},
{"reference": "linux-azure-nvidia"},
{"reference": "linux-azure-tools-6.8.0"},
{"reference": "linux-buildinfo-6.8.0"},
{"reference": "linux-cloud-tools-6.8.0"},
{"reference": "linux-cloud-tools-common"},
{"reference": "linux-doc"},
{"reference": "linux-gcp-headers-6.8.0"},
{"reference": "linux-gcp-tools-6.8.0"},
{"reference": "linux-gke-headers-6.8.0"},
{"reference": "linux-gke-tools-6.8.0"},
{"reference": "linux-gkeop"},
{"reference": "linux-headers-6.8.0"},
{"reference": "linux-ibm-cloud-tools-6.8.0"},
{"reference": "linux-ibm-cloud-tools-common"},
{"reference": "linux-ibm-headers-6.8.0"},
{"reference": "linux-ibm-source-6.8.0"},
{"reference": "linux-ibm-tools-6.8.0"},
{"reference": "linux-ibm-tools-common"},
{"reference": "linux-image-6.8.0"},
{"reference": "linux-image-unsigned-6.8.0"},
{"reference": "linux-intel"},
{"reference": "linux-lib-rust-6.8.0"},
{"reference": "linux-libc-dev"},
{"reference": "linux-lowlatency-cloud-tools-6.8.0"},
{"reference": "linux-lowlatency-cloud-tools-common"},
{"reference": "linux-lowlatency-headers-6.8.0"},
{"reference": "linux-lowlatency-lib-rust-6.8.0"},
{"reference": "linux-lowlatency-tools-6.8.0"},
{"reference": "linux-lowlatency-tools-common"},
{"reference": "linux-lowlatency-tools-host"},
{"reference": "linux-modules-6.8.0"},
{"reference": "linux-modules-extra-6.8.0"},
{"reference": "linux-modules-ipu6-6.8.0"},
{"reference": "linux-modules-ivsc-6.8.0"},
{"reference": "linux-modules-iwlwifi-6.8.0"},
{"reference": "linux-nvidia"},
{"reference": "linux-nvidia-lowlatency"},
{"reference": "linux-nvidia-tegra"},
{"reference": "linux-oem-6.8-headers-6.8.0"},
{"reference": "linux-oem-6.8-lib-rust-6.8.0"},
{"reference": "linux-oem-6.8-tools-6.8.0"},
{"reference": "linux-oracle-headers-6.8.0"},
{"reference": "linux-oracle-tools-6.8.0"},
{"reference": "linux-raspi-headers-6.8.0"},
{"reference": "linux-raspi-realtime"},
{"reference": "linux-raspi-tools-6.8.0"},
{"reference": "linux-realtime"},
{"reference": "linux-riscv-headers-6.8.0"},
{"reference": "linux-riscv-tools-6.8.0"},
{"reference": "linux-source-6.8.0"},
{"reference": "linux-tools-6.8.0"},
{"reference": "linux-tools-common"},
{"reference": "linux-tools-host"},
{"reference": "linux-udebs-aws"},
{"reference": "linux-udebs-azure"},
{"reference": "linux-xilinx"}
]
}
]
},
"Ubuntu Linux-25.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "25.04",
"pkgs": [
{"reference": "linux-azure-fde"}
]
}
]
},
"Red Hat Enterprise Linux-9": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "9",
"pkgs": [
{"reference": "kernel-rt"},
{"reference": "kernel-rt-core"},
{"reference": "kernel-rt-debug"},
{"reference": "kernel-rt-debug-core"},
{"reference": "kernel-rt-debug-devel"},
{"reference": "kernel-rt-debug-devel-matched"},
{"reference": "kernel-rt-debug-kvm"},
{"reference": "kernel-rt-debug-modules"},
{"reference": "kernel-rt-debug-modules-core"},
{"reference": "kernel-rt-debug-modules-extra"},
{"reference": "kernel-rt-debug-modules-internal"},
{"reference": "kernel-rt-debug-modules-partner"},
{"reference": "kernel-rt-devel"},
{"reference": "kernel-rt-devel-matched"},
{"reference": "kernel-rt-kvm"},
{"reference": "kernel-rt-modules"},
{"reference": "kernel-rt-modules-core"},
{"reference": "kernel-rt-modules-extra"},
{"reference": "kernel-rt-modules-internal"},
{"reference": "kernel-rt-modules-partner"},
{"reference": "kernel-rt-selftests-internal"}
]
}
]
}
};
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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