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Linux Distros Unpatched Vulnerability : CVE-2026-93246

🗓️ 25 Sep 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 9 Views

Out-of-bounds read in octeontx2-af rvu_register_interrupts() causes KASAN at boot.

Related
Refs
Code
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-93246
24 Sep 202615:51
–cve
cvelist
Cvelist
CVE-2026-93246 octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity
24 Sep 202615:51
–cvelist
debiancve
Debian CVE
CVE-2026-93246
24 Sep 202615:51
–debiancve
euvd
EUVD
EUVD-2026-86256
24 Sep 202615:51
–euvd
nvd
NVD
CVE-2026-93246
24 Sep 202616:17
–nvd
osv
OSV
BELL-CVE-2026-93246 CVE-2026-93246 does not affect BellSoft software
26 Sep 202606:06
–osv
osv
OSV
DEBIAN-CVE-2026-93246
24 Sep 202616:17
–osv
osv
OSV
OPENSUSE-SU-2026:11893-1 kernel-devel-7.2.8-1.1 on GA media
28 Sep 202600:00
–osv
osv
OSV
UBUNTU-CVE-2026-93246
24 Sep 202616:17
–osv
ptsecurity
Positive Technologies
PT-2026-97933
24 Sep 202600:00
–ptsecurity
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

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  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-93246");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
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"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: fix out-of-bounds read
    setting MSI-X irq affinity rvu_register_interrupts() walks every MSI-X vector and uses strstr() to match
    Mbox or FLR in irq_name before pinning those interrupts to CPU 0. irq_name is a per-vector NAME_SIZE
    buffer, but not every slot is populated before this loop runs. strstr() keeps scanning until it finds a
    NUL terminator, so an uninitialized slot can trigger a KASAN slab-out-of-bounds read at boot when debug
    options are enabled. Use strnstr() with NAME_SIZE to bound the search within each vector's name buffer.
    (CVE-2026-93246)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/24");
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  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
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  script_require_ports("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");

  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"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
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    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "linux-hwe-edge"}
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  "Ubuntu Linux-18.04": {
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        "release": "18.04",
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          {"reference": "linux-oracle-5.3"},
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  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
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          {"reference": "linux-tools-5.17.0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "linux-aws-6.14"},
          {"reference": "linux-aws-6.17"},
          {"reference": "linux-azure-6.11"},
          {"reference": "linux-azure-6.14"},
          {"reference": "linux-azure-6.17"},
          {"reference": "linux-azure-fde-6.14"},
          {"reference": "linux-azure-fde-6.17"},
          {"reference": "linux-azure-nvidia-6.14"},
          {"reference": "linux-buildinfo-6.8.0"},
          {"reference": "linux-cloud-tools-6.8.0"},
          {"reference": "linux-gcp-6.11"},
          {"reference": "linux-gcp-6.14"},
          {"reference": "linux-gcp-6.17"},
          {"reference": "linux-headers-6.8.0"},
          {"reference": "linux-hwe-6.11"},
          {"reference": "linux-hwe-6.14"},
          {"reference": "linux-image-6.8.0"},
          {"reference": "linux-image-unsigned-6.8.0"},
          {"reference": "linux-lowlatency-hwe-6.11"},
          {"reference": "linux-modules-6.8.0"},
          {"reference": "linux-modules-extra-6.8.0"},
          {"reference": "linux-modules-ipu6-6.8.0"},
          {"reference": "linux-modules-iwlwifi-6.8.0"},
          {"reference": "linux-nvidia-6.11"},
          {"reference": "linux-nvidia-6.17"},
          {"reference": "linux-oem-6.11"},
          {"reference": "linux-oem-6.14"},
          {"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-6.14"},
          {"reference": "linux-oracle-6.17"},
          {"reference": "linux-raspi-realtime"},
          {"reference": "linux-realtime"},
          {"reference": "linux-riscv-6.14"},
          {"reference": "linux-riscv-6.17"},
          {"reference": "linux-riscv-headers-6.8.0"},
          {"reference": "linux-riscv-tools-6.8.0"},
          {"reference": "linux-tools-6.8.0"}
        ]
      }
    ]
  }
};

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 third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
    var third_party_vendors = distro_constraints_values['third_party'];
    if (!empty_or_null(third_party_vendors)) {
        var vendor;
        foreach vendor (third_party_vendors) {
            if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
        }
    }
}

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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30 Sep 2026 00:00Current
6Medium risk
Vulners AI Score6
EPSS0.00189
9