Linux Distros Unpatched Vulnerability : CVE-2022-49272

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

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if (description)
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  script_id(225299);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/11");

  script_cve_id("CVE-2022-49272");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2022-49272");

  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.

  - In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix potential AB/BA lock
    with buffer_mutex and mmap_lock syzbot caught a potential deadlock between the PCM runtime->buffer_mutex
    and the mm->mmap_lock. It was brought by the recent fix to cover the racy read/write and other ioctls, and
    in that commit, I overlooked a (hopefully only) corner case that may take the revert lock, namely, the OSS
    mmap. The OSS mmap operation exceptionally allows to re-configure the parameters inside the OSS mmap
    syscall, where mm->mmap_mutex is already held. Meanwhile, the copy_from/to_user calls at read/write
    operations also take the mm->mmap_lock internally, hence it may lead to a AB/BA deadlock. A similar
    problem was already seen in the past and we fixed it with a refcount (in commit b248371628aa). The former
    fix covered only the call paths with OSS read/write and OSS ioctls, while we need to cover the concurrent
    access via both ALSA and OSS APIs now. This patch addresses the problem above by replacing the
    buffer_mutex lock in the read/write operations with a refcount similar as we've used for OSS. The new
    field, runtime->buffer_accessing, keeps the number of concurrent read/write operations. Unlike the former
    buffer_mutex protection, this protects only around the copy_from/to_user() calls; the other codes are
    basically protected by the PCM stream lock. The refcount can be a negative, meaning blocked by the ioctls.
    If a negative value is seen, the read/write aborts with -EBUSY. In the ioctl side, OTOH, they check this
    refcount, too, and set to a negative value for blocking unless it's already being accessed.
    (CVE-2022-49272)

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-2022-49272");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2022-49272");
  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:L/Au:N/C:P/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:L/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:"cvss_score_source", value:"CVE-2022-49272");

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  script_set_attribute(attribute:"exploit_available", value:"false");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2025/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/05");

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  script_category(ACT_GATHER_INFO);
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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');

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