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Linux Distros Unpatched Vulnerability : CVE-2026-86424

🗓️ 07 Sep 2026 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 4 Views

TOCTOU in ImageMagick before 7.1.2-30 and 6.9.13-55 allows symlink swap to bypass write policy.

Related
Refs
Code
ReporterTitlePublishedViews
Family
cve
CVE		CVE-2026-86424
7 Sep 202612:53
–cve
cvelist
Cvelist		CVE-2026-86424 ImageMagick before 7.1.2-30 Path Traversal via TOCTOU Symlink Race
7 Sep 202612:53
–cvelist
debiancve
Debian CVE		CVE-2026-86424
7 Sep 202612:53
–debiancve
euvd
EUVD		EUVD-2026-72382
7 Sep 202612:53
–euvd
nvd
NVD		CVE-2026-86424
7 Sep 202613:20
–nvd
osv
OSV		DEBIAN-CVE-2026-86424
7 Sep 202613:20
–osv
osv
OSV		ECHO-7914-75A2-5326
8 Sep 202607:45
–osv
ptsecurity
Positive Technologies		PT-2026-86790
7 Sep 202600:00
–ptsecurity
redhatcve
RedhatCVE		CVE-2026-86424
8 Sep 202623:03
–redhatcve
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(343535);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/08");

  script_cve_id("CVE-2026-86424");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-86424");

  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.");
  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.

  - ImageMagick before 7.1.2-30 and 6.9.13-55 contains a time-of-check-time-of-use (TOCTOU) vulnerability in
    the video decoder that allows attackers to bypass path policy write restrictions via symlink swaps. An
    attacker can replace a symlink between policy validation (check-time) and the file write operation (use-
    time) to write to policy-denied locations. (CVE-2026-86424)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2026-86424");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-86424");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:N/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-86424");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ImageMagick");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ImageMagick-c++");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ImageMagick-c++-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ImageMagick-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ImageMagick-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ImageMagick-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:imagemagick");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ImageMagick");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ImageMagick-c++");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ImageMagick-c++-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ImageMagick-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ImageMagick-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ImageMagick-perl");
  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");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/CentOS Linux-7", "Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14", "Host/OS/Red Hat Enterprise Linux-6", "Host/OS/Red Hat Enterprise Linux-7");

  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/CentOS/rpm-list")) && 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 = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "imagemagick"},
          {"reference": "imagemagick-6-common"},
          {"reference": "imagemagick-6-doc"},
          {"reference": "imagemagick-6.q16"},
          {"reference": "imagemagick-6.q16hdri"},
          {"reference": "imagemagick-common"},
          {"reference": "imagemagick-doc"},
          {"reference": "libimage-magick-perl"},
          {"reference": "libimage-magick-q16-perl"},
          {"reference": "libimage-magick-q16hdri-perl"},
          {"reference": "libmagick++-6-headers"},
          {"reference": "libmagick++-6.q16-8"},
          {"reference": "libmagick++-6.q16-dev"},
          {"reference": "libmagick++-6.q16hdri-8"},
          {"reference": "libmagick++-6.q16hdri-dev"},
          {"reference": "libmagick++-dev"},
          {"reference": "libmagickcore-6-arch-config"},
          {"reference": "libmagickcore-6-headers"},
          {"reference": "libmagickcore-6.q16-6"},
          {"reference": "libmagickcore-6.q16-6-extra"},
          {"reference": "libmagickcore-6.q16-dev"},
          {"reference": "libmagickcore-6.q16hdri-6"},
          {"reference": "libmagickcore-6.q16hdri-6-extra"},
          {"reference": "libmagickcore-6.q16hdri-dev"},
          {"reference": "libmagickcore-dev"},
          {"reference": "libmagickwand-6-headers"},
          {"reference": "libmagickwand-6.q16-6"},
          {"reference": "libmagickwand-6.q16-dev"},
          {"reference": "libmagickwand-6.q16hdri-6"},
          {"reference": "libmagickwand-6.q16hdri-dev"},
          {"reference": "libmagickwand-dev"},
          {"reference": "perlmagick"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "imagemagick"},
          {"reference": "imagemagick-7-common"},
          {"reference": "imagemagick-7-doc"},
          {"reference": "imagemagick-7.q16"},
          {"reference": "imagemagick-7.q16hdri"},
          {"reference": "libimage-magick-perl"},
          {"reference": "libimage-magick-q16-perl"},
          {"reference": "libimage-magick-q16hdri-perl"},
          {"reference": "libmagick++-7-headers"},
          {"reference": "libmagick++-7.q16-5"},
          {"reference": "libmagick++-7.q16-dev"},
          {"reference": "libmagick++-7.q16hdri-5"},
          {"reference": "libmagick++-7.q16hdri-dev"},
          {"reference": "libmagick++-dev"},
          {"reference": "libmagickcore-7-arch-config"},
          {"reference": "libmagickcore-7-headers"},
          {"reference": "libmagickcore-7.q16-10"},
          {"reference": "libmagickcore-7.q16-10-extra"},
          {"reference": "libmagickcore-7.q16-dev"},
          {"reference": "libmagickcore-7.q16hdri-10"},
          {"reference": "libmagickcore-7.q16hdri-10-extra"},
          {"reference": "libmagickcore-7.q16hdri-dev"},
          {"reference": "libmagickcore-dev"},
          {"reference": "libmagickwand-7-headers"},
          {"reference": "libmagickwand-7.q16-10"},
          {"reference": "libmagickwand-7.q16-dev"},
          {"reference": "libmagickwand-7.q16hdri-10"},
          {"reference": "libmagickwand-7.q16hdri-dev"},
          {"reference": "libmagickwand-dev"},
          {"reference": "perlmagick"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "imagemagick"},
          {"reference": "imagemagick-7-common"},
          {"reference": "imagemagick-7-doc"},
          {"reference": "imagemagick-7.q16"},
          {"reference": "imagemagick-7.q16hdri"},
          {"reference": "libimage-magick-perl"},
          {"reference": "libimage-magick-q16-perl"},
          {"reference": "libimage-magick-q16hdri-perl"},
          {"reference": "libmagick++-7-headers"},
          {"reference": "libmagick++-7.q16-5"},
          {"reference": "libmagick++-7.q16-dev"},
          {"reference": "libmagick++-7.q16hdri-5"},
          {"reference": "libmagick++-7.q16hdri-dev"},
          {"reference": "libmagick++-dev"},
          {"reference": "libmagickcore-7-arch-config"},
          {"reference": "libmagickcore-7-headers"},
          {"reference": "libmagickcore-7.q16-10"},
          {"reference": "libmagickcore-7.q16-10-extra"},
          {"reference": "libmagickcore-7.q16-dev"},
          {"reference": "libmagickcore-7.q16hdri-10"},
          {"reference": "libmagickcore-7.q16hdri-10-extra"},
          {"reference": "libmagickcore-7.q16hdri-dev"},
          {"reference": "libmagickcore-dev"},
          {"reference": "libmagickwand-7-headers"},
          {"reference": "libmagickwand-7.q16-10"},
          {"reference": "libmagickwand-7.q16-dev"},
          {"reference": "libmagickwand-7.q16hdri-10"},
          {"reference": "libmagickwand-7.q16hdri-dev"},
          {"reference": "libmagickwand-dev"},
          {"reference": "perlmagick"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "ImageMagick"},
          {"reference": "ImageMagick-c++"},
          {"reference": "ImageMagick-c++-devel"},
          {"reference": "ImageMagick-devel"},
          {"reference": "ImageMagick-doc"},
          {"reference": "ImageMagick-perl"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "ImageMagick"},
          {"reference": "ImageMagick-c++"},
          {"reference": "ImageMagick-c++-devel"},
          {"reference": "ImageMagick-devel"},
          {"reference": "ImageMagick-doc"},
          {"reference": "ImageMagick-perl"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "ImageMagick"},
          {"reference": "ImageMagick-c++"},
          {"reference": "ImageMagick-c++-devel"},
          {"reference": "ImageMagick-devel"},
          {"reference": "ImageMagick-doc"},
          {"reference": "ImageMagick-perl"}
        ]
      }
    ]
  }
};

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_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}

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08 Sep 2026 00:00Current
CVSS 42
CVSS 3.12.5
EPSS0.00117
ImageMagickTOCTOUsymlink swappath policy bypassvideo decoder
4