Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-3183)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2026-3183.
##

include('compat.inc');

if (description)
{
  script_id(365240);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/12");

  script_cve_id(
    "CVE-2026-89637",
    "CVE-2026-89652",
    "CVE-2026-93125",
    "CVE-2026-98096"
  );

  script_name(english:"Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-3183)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3183 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    smb: client: fix UAF and buffer leak in cifs_check_trans2() for malformed secondary T2 (CVE-2026-89637)

    In the Linux kernel, the following vulnerability has been resolved:

    ceph: bound copied dentry name length in NFS export get_name

    ceph_get_name() copies the MDS-supplied name into the caller'sNAME_MAX-sized buffer with memcpy(name,
    rinfo->dname, rinfo->dname_len)and then writes name[rinfo->dname_len] = 0, without checking
    dname_lenagainst NAME_MAX. A malicious or buggy MDS that returns a LOOKUPNAME replywith dname_len >
    NAME_MAX overflows the buffer. __get_snap_name() copiesrde->name / rde->name_len the same unchecked way.

    Impact: a malicious or compromised Ceph MDS overflows the NAME_MAX namebuffer in a client's NFS-export
    get_name path, a slab out-of-bounds writereported by KASAN. Reachable when a CephFS mount is re-exported
    over NFS.

    Add ceph_export_copy_name(), which rejects lengths above NAME_MAX with-ENAMETOOLONG before the copy, and
    use it in both ceph_get_name() and__get_snap_name(). (CVE-2026-89652)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max (CVE-2026-93125)

    In the Linux kernel, the following vulnerability has been resolved:

    ipv6: sr: restore network header before routing and forwarding (CVE-2026-98096)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com//AL2023/ALAS2023-2026-3183.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-89637.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-89652.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-93125.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-98096.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update kernel --releasever 2023.12.20261012' or
  or 'dnf update --advisory ALAS2023-2026-3183 --releasever 2023.12.20261012' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-89652");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bpftool-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-livepatch-6.1.188-233.393");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-modules-extra-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python3-perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python3-perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  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", "kpatch.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm2.inc");
include("hotfixes.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

if (get_one_kb_item("Host/kpatch/kernel-cves"))
{
  var cve_list = make_list("CVE-2026-89637", "CVE-2026-89652", "CVE-2026-93125", "CVE-2026-98096");
  if (hotfix_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "kpatch hotfix for ALAS2023-2026-3183");
  }
  else
  {
    __rpm_report = hotfix_reporting_text();
  }
}

var pkgs = [
    {'reference':'bpftool-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'bpftool-6.1.'},
    {'reference':'bpftool-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'bpftool-6.1.'},
    {'reference':'bpftool-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'bpftool-debuginfo-6.1.'},
    {'reference':'bpftool-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'bpftool-debuginfo-6.1.'},
    {'reference':'kernel-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-6.1.'},
    {'reference':'kernel-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-6.1.'},
    {'reference':'kernel-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debuginfo-6.1.'},
    {'reference':'kernel-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debuginfo-6.1.'},
    {'reference':'kernel-debuginfo-common-aarch64-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debuginfo-common-aarch64-6.1.'},
    {'reference':'kernel-debuginfo-common-x86_64-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debuginfo-common-x86_64-6.1.'},
    {'reference':'kernel-devel-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-devel-6.1.'},
    {'reference':'kernel-devel-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-devel-6.1.'},
    {'reference':'kernel-headers-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-headers-6.1.'},
    {'reference':'kernel-headers-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-headers-6.1.'},
    {'reference':'kernel-livepatch-6.1.188-233.393-1.0-0.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-livepatch-6.1.188-233.393-1.0-0.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-modules-extra-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-modules-extra-6.1.'},
    {'reference':'kernel-modules-extra-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-modules-extra-6.1.'},
    {'reference':'kernel-modules-extra-common-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-modules-extra-common-6.1.'},
    {'reference':'kernel-modules-extra-common-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-modules-extra-common-6.1.'},
    {'reference':'kernel-tools-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-6.1.'},
    {'reference':'kernel-tools-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-6.1.'},
    {'reference':'kernel-tools-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-debuginfo-6.1.'},
    {'reference':'kernel-tools-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-debuginfo-6.1.'},
    {'reference':'kernel-tools-devel-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-devel-6.1.'},
    {'reference':'kernel-tools-devel-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-devel-6.1.'},
    {'reference':'perf-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'perf-6.1.'},
    {'reference':'perf-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'perf-6.1.'},
    {'reference':'perf-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'perf-debuginfo-6.1.'},
    {'reference':'perf-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'perf-debuginfo-6.1.'},
    {'reference':'python3-perf-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'python3-perf-6.1.'},
    {'reference':'python3-perf-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'python3-perf-6.1.'},
    {'reference':'python3-perf-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'python3-perf-debuginfo-6.1.'},
    {'reference':'python3-perf-debuginfo-6.1.188-233.393.amzn2023', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'python3-perf-debuginfo-6.1.'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "bpftool / bpftool-debuginfo / kernel / etc");
}