Linux Distros Unpatched Vulnerability : CVE-2025-37772

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

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  script_version("1.22");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/22");

  script_cve_id("CVE-2025-37772");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-37772");

  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: RDMA/cma: Fix workqueue crash in
    cma_netevent_work_handler struct rdma_cm_id has member struct work_struct net_work that is reused for
    enqueuing cma_netevent_work_handler()s onto cma_wq. Below crash[1] can occur if more than one call to
    cma_netevent_callback() occurs in quick succession, which further enqueues cma_netevent_work_handler()s
    for the same rdma_cm_id, overwriting any previously queued work-item(s) that was just scheduled to run
    i.e. there is no guarantee the queued work item may run between two successive calls to
    cma_netevent_callback() and the 2nd INIT_WORK would overwrite the 1st work item (for the same rdma_cm_id),
    despite grabbing id_table_lock during enqueue. Also drgn analysis [2] indicates the work item was likely
    overwritten. Fix this by moving the INIT_WORK() to __rdma_create_id(), so that it doesn't race with any
    existing queue_work() or its worker thread. [1] Trimmed crash stack:
    ============================================= BUG: kernel NULL pointer dereference, address:
    0000000000000008 kworker/u256:6 ... 6.12.0-0... Workqueue: cma_netevent_work_handler [rdma_cm] (rdma_cm)
    RIP: 0010:process_one_work+0xba/0x31a Call Trace: worker_thread+0x266/0x3a0 kthread+0xcf/0x100
    ret_from_fork+0x31/0x50 ret_from_fork_asm+0x1a/0x30 ============================================= [2] drgn
    crash analysis: >>> trace = prog.crashed_thread().stack_trace() >>> trace (0) crash_setup_regs
    (./arch/x86/include/asm/kexec.h:111:15) (1) __crash_kexec (kernel/crash_core.c:122:4) (2) panic
    (kernel/panic.c:399:3) (3) oops_end (arch/x86/kernel/dumpstack.c:382:3) ... (8) process_one_work
    (kernel/workqueue.c:3168:2) (9) process_scheduled_works (kernel/workqueue.c:3310:3) (10) worker_thread
    (kernel/workqueue.c:3391:4) (11) kthread (kernel/kthread.c:389:9) Line workqueue.c:3168 for this kernel
    version is in process_one_work(): 3168 strscpy(worker->desc, pwq->wq->name, WORKER_DESC_LEN); >>>
    trace[8][work] *(struct work_struct *)0xffff92577d0a21d8 = { .data = (atomic_long_t){ .counter =
    (s64)536870912, <=== Note }, .entry = (struct list_head){ .next = (struct list_head *)0xffff924d075924c0,
    .prev = (struct list_head *)0xffff924d075924c0, }, .func = (work_func_t)cma_netevent_work_handler+0x0 =
    0xffffffffc2cec280, } Suspicion is that pwq is NULL: >>> trace[8][pwq] (struct pool_workqueue *)<absent>
    In process_one_work(), pwq is assigned from: struct pool_workqueue *pwq = get_work_pwq(work); and
    get_work_pwq() is: static struct pool_workqueue *get_work_pwq(struct work_struct *work) { unsigned long
    data = atomic_long_read(&work->data); if (data & WORK_STRUCT_PWQ) return work_struct_pwq(data); else
    return NULL; } WORK_STRUCT_PWQ is 0x4: >>> print(repr(prog['WORK_STRUCT_PWQ'])) Object(prog, 'enum
    work_flags', value=4) But work->data is 536870912 which is 0x20000000. So, get_work_pwq() returns NULL and
    we crash in process_one_work(): 3168 strscpy(worker->desc, pwq->wq->name, WORKER_DESC_LEN);
    ============================================= (CVE-2025-37772)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  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:N/I:N/A:C");
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  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
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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"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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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-azure-6.11"},
          {"reference": "linux-azure-fde"},
          {"reference": "linux-azure-fde-6.17"},
          {"reference": "linux-azure-nvidia"},
          {"reference": "linux-buildinfo-6.8.0"},
          {"reference": "linux-cloud-tools-6.8.0"},
          {"reference": "linux-gcp-6.11"},
          {"reference": "linux-headers-6.8.0"},
          {"reference": "linux-hwe-6.11"},
          {"reference": "linux-image-6.8.0"},
          {"reference": "linux-image-unsigned-6.8.0"},
          {"reference": "linux-intel"},
          {"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-oem-6.11"},
          {"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-raspi-realtime"},
          {"reference": "linux-realtime"},
          {"reference": "linux-riscv-headers-6.8.0"},
          {"reference": "linux-riscv-tools-6.8.0"},
          {"reference": "linux-tools-6.8.0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "linux-azure-fde"}
        ]
      }
    ]
  }
};

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');
}