RHEL 10 : valkey (RHSA-2026:26540)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:26540. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(321355);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/17");

  script_cve_id("CVE-2026-23479", "CVE-2026-23631", "CVE-2026-25243");
  script_xref(name:"RHSA", value:"2026:26540");

  script_name(english:"RHEL 10 : valkey (RHSA-2026:26540)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for valkey.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2026:26540 advisory.

    Valkey is an advanced key-value store. It is often referred to as a data structure server since keys can
    contain strings, hashes, lists, sets and sorted sets.  You can run atomic operations on these types, like
    appending to a string; incrementing the value in a hash; pushing to a list; computing set intersection,
    union and difference; or getting the member with highest ranking in a sorted set.  In order to achieve its
    outstanding performance, Valkey works with an in-memory dataset. Depending on your use case, you can
    persist it either by dumping the dataset to disk every once in a while, or by appending each command to a
    log.  Valkey also supports trivial-to-setup master-slave replication, with very fast non-blocking first
    synchronization, auto-reconnection on net split and so forth.  Other features include Transactions,
    Pub/Sub, Lua scripting, Keys with a limited time-to-live, and configuration settings to make Valkey behave
    like a cache.  You can use Valkey from most programming languages also.

    Security Fix(es):

    * redis: use-after-free in unblock client flow may allow remote code execution (CVE-2026-23479)

    * redis: Remote code execution via use-after-free in Lua scripting (CVE-2026-23631)

    * redis: RESTORE invalid memory access may allow remote code execution (CVE-2026-25243)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
    other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2466780");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2466788");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2466828");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_26540.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?781abdd4");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:26540");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL valkey package based on the guidance in RHSA-2026:26540.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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-2026-25243");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(122, 416);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/05/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux_eus:10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:valkey");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:valkey-devel");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat 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_info.nasl", "redhat_repos.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'Red Hat' >!< os_product) audit(AUDIT_OS_NOT, 'Red Hat');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
if (!rhel_check_release(operator: 'ge', os_version: os_version, rhel_version: '10')) audit(AUDIT_OS_NOT, 'Red Hat 10.x', 'Red Hat ' + os_version);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'release': '10',
    'sp': '0',
    'repo_relative_urls': [
      'content/e4s/rhel10/10.0/aarch64/appstream/debug',
      'content/e4s/rhel10/10.0/aarch64/appstream/os',
      'content/e4s/rhel10/10.0/aarch64/appstream/source/SRPMS',
      'content/e4s/rhel10/10.0/aarch64/baseos/debug',
      'content/e4s/rhel10/10.0/aarch64/baseos/os',
      'content/e4s/rhel10/10.0/aarch64/baseos/source/SRPMS',
      'content/e4s/rhel10/10.0/aarch64/highavailability/debug',
      'content/e4s/rhel10/10.0/aarch64/highavailability/os',
      'content/e4s/rhel10/10.0/aarch64/highavailability/source/SRPMS',
      'content/e4s/rhel10/10.0/aarch64/rt/debug',
      'content/e4s/rhel10/10.0/aarch64/rt/os',
      'content/e4s/rhel10/10.0/aarch64/rt/source/SRPMS',
      'content/e4s/rhel10/10.0/ppc64le/appstream/debug',
      'content/e4s/rhel10/10.0/ppc64le/appstream/os',
      'content/e4s/rhel10/10.0/ppc64le/appstream/source/SRPMS',
      'content/e4s/rhel10/10.0/ppc64le/baseos/debug',
      'content/e4s/rhel10/10.0/ppc64le/baseos/os',
      'content/e4s/rhel10/10.0/ppc64le/baseos/source/SRPMS',
      'content/e4s/rhel10/10.0/ppc64le/highavailability/debug',
      'content/e4s/rhel10/10.0/ppc64le/highavailability/os',
      'content/e4s/rhel10/10.0/ppc64le/highavailability/source/SRPMS',
      'content/e4s/rhel10/10.0/ppc64le/sap-solutions/debug',
      'content/e4s/rhel10/10.0/ppc64le/sap-solutions/os',
      'content/e4s/rhel10/10.0/ppc64le/sap-solutions/source/SRPMS',
      'content/e4s/rhel10/10.0/ppc64le/sap/debug',
      'content/e4s/rhel10/10.0/ppc64le/sap/os',
      'content/e4s/rhel10/10.0/ppc64le/sap/source/SRPMS',
      'content/e4s/rhel10/10.0/s390x/appstream/debug',
      'content/e4s/rhel10/10.0/s390x/appstream/os',
      'content/e4s/rhel10/10.0/s390x/appstream/source/SRPMS',
      'content/e4s/rhel10/10.0/s390x/baseos/debug',
      'content/e4s/rhel10/10.0/s390x/baseos/os',
      'content/e4s/rhel10/10.0/s390x/baseos/source/SRPMS',
      'content/e4s/rhel10/10.0/s390x/highavailability/debug',
      'content/e4s/rhel10/10.0/s390x/highavailability/os',
      'content/e4s/rhel10/10.0/s390x/highavailability/source/SRPMS',
      'content/e4s/rhel10/10.0/s390x/sap/debug',
      'content/e4s/rhel10/10.0/s390x/sap/os',
      'content/e4s/rhel10/10.0/s390x/sap/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/appstream/debug',
      'content/e4s/rhel10/10.0/x86_64/appstream/os',
      'content/e4s/rhel10/10.0/x86_64/appstream/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/baseos/debug',
      'content/e4s/rhel10/10.0/x86_64/baseos/os',
      'content/e4s/rhel10/10.0/x86_64/baseos/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/highavailability/debug',
      'content/e4s/rhel10/10.0/x86_64/highavailability/os',
      'content/e4s/rhel10/10.0/x86_64/highavailability/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/nfv/debug',
      'content/e4s/rhel10/10.0/x86_64/nfv/os',
      'content/e4s/rhel10/10.0/x86_64/nfv/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/rt/debug',
      'content/e4s/rhel10/10.0/x86_64/rt/os',
      'content/e4s/rhel10/10.0/x86_64/rt/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/sap-solutions/debug',
      'content/e4s/rhel10/10.0/x86_64/sap-solutions/os',
      'content/e4s/rhel10/10.0/x86_64/sap-solutions/source/SRPMS',
      'content/e4s/rhel10/10.0/x86_64/sap/debug',
      'content/e4s/rhel10/10.0/x86_64/sap/os',
      'content/e4s/rhel10/10.0/x86_64/sap/source/SRPMS',
      'content/eus/rhel10/10.0/aarch64/appstream/debug',
      'content/eus/rhel10/10.0/aarch64/appstream/os',
      'content/eus/rhel10/10.0/aarch64/appstream/source/SRPMS',
      'content/eus/rhel10/10.0/aarch64/baseos/debug',
      'content/eus/rhel10/10.0/aarch64/baseos/os',
      'content/eus/rhel10/10.0/aarch64/baseos/source/SRPMS',
      'content/eus/rhel10/10.0/aarch64/codeready-builder/debug',
      'content/eus/rhel10/10.0/aarch64/codeready-builder/os',
      'content/eus/rhel10/10.0/aarch64/codeready-builder/source/SRPMS',
      'content/eus/rhel10/10.0/aarch64/highavailability/debug',
      'content/eus/rhel10/10.0/aarch64/highavailability/os',
      'content/eus/rhel10/10.0/aarch64/highavailability/source/SRPMS',
      'content/eus/rhel10/10.0/aarch64/rt/debug',
      'content/eus/rhel10/10.0/aarch64/rt/os',
      'content/eus/rhel10/10.0/aarch64/rt/source/SRPMS',
      'content/eus/rhel10/10.0/aarch64/supplementary/debug',
      'content/eus/rhel10/10.0/aarch64/supplementary/os',
      'content/eus/rhel10/10.0/aarch64/supplementary/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/appstream/debug',
      'content/eus/rhel10/10.0/ppc64le/appstream/os',
      'content/eus/rhel10/10.0/ppc64le/appstream/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/baseos/debug',
      'content/eus/rhel10/10.0/ppc64le/baseos/os',
      'content/eus/rhel10/10.0/ppc64le/baseos/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/codeready-builder/debug',
      'content/eus/rhel10/10.0/ppc64le/codeready-builder/os',
      'content/eus/rhel10/10.0/ppc64le/codeready-builder/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/highavailability/debug',
      'content/eus/rhel10/10.0/ppc64le/highavailability/os',
      'content/eus/rhel10/10.0/ppc64le/highavailability/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/sap-solutions/debug',
      'content/eus/rhel10/10.0/ppc64le/sap-solutions/os',
      'content/eus/rhel10/10.0/ppc64le/sap-solutions/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/sap/debug',
      'content/eus/rhel10/10.0/ppc64le/sap/os',
      'content/eus/rhel10/10.0/ppc64le/sap/source/SRPMS',
      'content/eus/rhel10/10.0/ppc64le/supplementary/debug',
      'content/eus/rhel10/10.0/ppc64le/supplementary/os',
      'content/eus/rhel10/10.0/ppc64le/supplementary/source/SRPMS',
      'content/eus/rhel10/10.0/s390x/appstream/debug',
      'content/eus/rhel10/10.0/s390x/appstream/os',
      'content/eus/rhel10/10.0/s390x/appstream/source/SRPMS',
      'content/eus/rhel10/10.0/s390x/baseos/debug',
      'content/eus/rhel10/10.0/s390x/baseos/os',
      'content/eus/rhel10/10.0/s390x/baseos/source/SRPMS',
      'content/eus/rhel10/10.0/s390x/codeready-builder/debug',
      'content/eus/rhel10/10.0/s390x/codeready-builder/os',
      'content/eus/rhel10/10.0/s390x/codeready-builder/source/SRPMS',
      'content/eus/rhel10/10.0/s390x/highavailability/debug',
      'content/eus/rhel10/10.0/s390x/highavailability/os',
      'content/eus/rhel10/10.0/s390x/highavailability/source/SRPMS',
      'content/eus/rhel10/10.0/s390x/sap/debug',
      'content/eus/rhel10/10.0/s390x/sap/os',
      'content/eus/rhel10/10.0/s390x/sap/source/SRPMS',
      'content/eus/rhel10/10.0/s390x/supplementary/debug',
      'content/eus/rhel10/10.0/s390x/supplementary/os',
      'content/eus/rhel10/10.0/s390x/supplementary/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/appstream/debug',
      'content/eus/rhel10/10.0/x86_64/appstream/os',
      'content/eus/rhel10/10.0/x86_64/appstream/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/baseos/debug',
      'content/eus/rhel10/10.0/x86_64/baseos/os',
      'content/eus/rhel10/10.0/x86_64/baseos/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/codeready-builder/debug',
      'content/eus/rhel10/10.0/x86_64/codeready-builder/os',
      'content/eus/rhel10/10.0/x86_64/codeready-builder/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/highavailability/debug',
      'content/eus/rhel10/10.0/x86_64/highavailability/os',
      'content/eus/rhel10/10.0/x86_64/highavailability/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/nfv/debug',
      'content/eus/rhel10/10.0/x86_64/nfv/os',
      'content/eus/rhel10/10.0/x86_64/nfv/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/rt/debug',
      'content/eus/rhel10/10.0/x86_64/rt/os',
      'content/eus/rhel10/10.0/x86_64/rt/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/sap-solutions/debug',
      'content/eus/rhel10/10.0/x86_64/sap-solutions/os',
      'content/eus/rhel10/10.0/x86_64/sap-solutions/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/sap/debug',
      'content/eus/rhel10/10.0/x86_64/sap/os',
      'content/eus/rhel10/10.0/x86_64/sap/source/SRPMS',
      'content/eus/rhel10/10.0/x86_64/supplementary/debug',
      'content/eus/rhel10/10.0/x86_64/supplementary/os',
      'content/eus/rhel10/10.0/x86_64/supplementary/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'valkey-8.0.9-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'valkey-devel-8.0.9-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var repo_relative_urls;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }

  if (!empty_or_null(constraint['repo_relative_urls'])) repo_relative_urls = constraint['repo_relative_urls'];

  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(rpm:exists_check))) &&
        rpm_check(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)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'valkey / valkey-devel');
}