#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
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if (description)
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script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/21");
script_cve_id("CVE-2022-49892");
script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2022-49892");
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.
- ftrace: Fix use-after-free for dynamic ftrace_ops KASAN reported a use-after-free with ftrace ops [1]. It
was found from vmcore that perf had registered two ops with the same content successively, both dynamic.
After unregistering the second ops, a use-after-free occurred. In ftrace_shutdown(), when the second ops
is unregistered, the FTRACE_UPDATE_CALLS command is not set because there is another enabled ops with the
same content. Also, both ops are dynamic and the ftrace callback function is ftrace_ops_list_func, so the
FTRACE_UPDATE_TRACE_FUNC command will not be set. Eventually the value of 'command' will be 0 and
ftrace_shutdown() will skip the rcu synchronization. However, ftrace may be activated. When the ops is
released, another CPU may be accessing the ops. Add the missing synchronization to fix this problem. [1]
BUG: KASAN: use-after-free in __ftrace_ops_list_func kernel/trace/ftrace.c:7020 [inline] BUG: KASAN: use-
after-free in ftrace_ops_list_func+0x2b0/0x31c kernel/trace/ftrace.c:7049 Read of size 8 at addr
ffff56551965bbc8 by task syz-executor.2/14468 CPU: 1 PID: 14468 Comm: syz-executor.2 Not tainted 5.10.0 #7
Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x0/0x40c
arch/arm64/kernel/stacktrace.c:132 show_stack+0x30/0x40 arch/arm64/kernel/stacktrace.c:196 __dump_stack
lib/dump_stack.c:77 [inline] dump_stack+0x1b4/0x248 lib/dump_stack.c:118
print_address_description.constprop.0+0x28/0x48c mm/kasan/report.c:387 __kasan_report
mm/kasan/report.c:547 [inline] kasan_report+0x118/0x210 mm/kasan/report.c:564 check_memory_region_inline
mm/kasan/generic.c:187 [inline] __asan_load8+0x98/0xc0 mm/kasan/generic.c:253 __ftrace_ops_list_func
kernel/trace/ftrace.c:7020 [inline] ftrace_ops_list_func+0x2b0/0x31c kernel/trace/ftrace.c:7049
ftrace_graph_call+0x0/0x4 __might_sleep+0x8/0x100 include/linux/perf_event.h:1170 __might_fault
mm/memory.c:5183 [inline] __might_fault+0x58/0x70 mm/memory.c:5171 do_strncpy_from_user
lib/strncpy_from_user.c:41 [inline] strncpy_from_user+0x1f4/0x4b0 lib/strncpy_from_user.c:139
getname_flags+0xb0/0x31c fs/namei.c:149 getname+0x2c/0x40 fs/namei.c:209 [...] Allocated by task 14445:
kasan_save_stack+0x24/0x50 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc mm/kasan/common.c:479 [inline] __kasan_kmalloc.constprop.0+0x110/0x13c
mm/kasan/common.c:449 kasan_kmalloc+0xc/0x14 mm/kasan/common.c:493 kmem_cache_alloc_trace+0x440/0x924
mm/slub.c:2950 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:675 [inline]
perf_event_alloc.part.0+0xb4/0x1350 kernel/events/core.c:11230 perf_event_alloc kernel/events/core.c:11733
[inline] __do_sys_perf_event_open kernel/events/core.c:11831 [inline]
__se_sys_perf_event_open+0x550/0x15f4 kernel/events/core.c:11723 __arm64_sys_perf_event_open+0x6c/0x80
kernel/events/core.c:11723 [...] Freed by task 14445: kasan_save_stack+0x24/0x50 mm/kasan/common.c:48
kasan_set_track+0x24/0x34 mm/kasan/common.c:56 kasan_set_free_info+0x20/0x40 mm/kasan/generic.c:358
__kasan_slab_free.part.0+0x11c/0x1b0 mm/kasan/common.c:437 __kasan_slab_free mm/kasan/common.c:445
[inline] kasan_slab_free+0x2c/0x40 mm/kasan/common.c:446 slab_free_hook mm/slub.c:1569 [inline]
slab_free_freelist_hook mm/slub.c:1608 [inline] slab_free mm/slub.c:3179 [inline] kfree+0x12c/0xc10
mm/slub.c:4176 perf_event_alloc.part.0+0xa0c/0x1350 kernel/events/core.c:11434 perf_event_alloc
kernel/events/core.c:11733 [inline] __do_sys_perf_event_open kernel/events/core.c:11831 [inline]
__se_sys_perf_event_open+0x550/0x15f4 kernel/events/core.c:11723 [...] (CVE-2022-49892)
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:
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script_set_attribute(attribute:"agent", value:"unix");
script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:C/I:C/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:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
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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) 2025-2026 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/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04");
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/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 = {
"Ubuntu Linux-14.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "14.04",
"pkgs": [
{"reference": "linux-aws"},
{"reference": "linux-azure"},
{"reference": "linux-lts-xenial"}
]
}
]
},
"Ubuntu Linux-16.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "16.04",
"pkgs": [
{"reference": "linux-aws"},
{"reference": "linux-aws-hwe"},
{"reference": "linux-azure"},
{"reference": "linux-cloud-tools-4.4.0"},
{"reference": "linux-cloud-tools-common"},
{"reference": "linux-doc"},
{"reference": "linux-gcp"},
{"reference": "linux-headers-4.4.0"},
{"reference": "linux-hwe"},
{"reference": "linux-hwe-edge"},
{"reference": "linux-image-4.4.0"},
{"reference": "linux-image-extra-4.4.0"},
{"reference": "linux-kvm"},
{"reference": "linux-libc-dev"},
{"reference": "linux-oracle"},
{"reference": "linux-source-4.4.0"},
{"reference": "linux-tools-4.4.0"},
{"reference": "linux-tools-common"},
{"reference": "linux-udebs-generic"},
{"reference": "linux-udebs-generic-lpae"},
{"reference": "linux-udebs-lowlatency"}
]
}
]
},
"Ubuntu Linux-18.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "18.04",
"pkgs": [
{"reference": "linux-aws-5.0"},
{"reference": "linux-aws-5.3"},
{"reference": "linux-aws-5.4"},
{"reference": "linux-aws-cloud-tools-4.15.0"},
{"reference": "linux-aws-headers-4.15.0"},
{"reference": "linux-aws-tools-4.15.0"},
{"reference": "linux-azure-4.15"},
{"reference": "linux-azure-5.3"},
{"reference": "linux-azure-5.4"},
{"reference": "linux-azure-cloud-tools-4.15.0"},
{"reference": "linux-azure-edge"},
{"reference": "linux-azure-headers-4.15.0"},
{"reference": "linux-azure-tools-4.15.0"},
{"reference": "linux-cloud-tools-4.15.0"},
{"reference": "linux-cloud-tools-common"},
{"reference": "linux-doc"},
{"reference": "linux-gcp-4.15"},
{"reference": "linux-gcp-5.3"},
{"reference": "linux-gcp-5.4"},
{"reference": "linux-gcp-headers-4.15.0"},
{"reference": "linux-gcp-tools-4.15.0"},
{"reference": "linux-gke-4.15"},
{"reference": "linux-gke-5.4"},
{"reference": "linux-gkeop-5.4"},
{"reference": "linux-headers-4.15.0"},
{"reference": "linux-hwe"},
{"reference": "linux-hwe-5.4"},
{"reference": "linux-hwe-edge"},
{"reference": "linux-ibm-5.4"},
{"reference": "linux-image-4.15.0"},
{"reference": "linux-image-unsigned-4.15.0"},
{"reference": "linux-kvm-cloud-tools-4.15.0"},
{"reference": "linux-kvm-headers-4.15.0"},
{"reference": "linux-kvm-tools-4.15.0"},
{"reference": "linux-libc-dev"},
{"reference": "linux-modules-4.15.0"},
{"reference": "linux-modules-extra-4.15.0"},
{"reference": "linux-oem-headers-4.15.0"},
{"reference": "linux-oem-tools-4.15.0"},
{"reference": "linux-oracle"},
{"reference": "linux-oracle-5.0"},
{"reference": "linux-oracle-5.3"},
{"reference": "linux-oracle-5.4"},
{"reference": "linux-raspi-5.4"},
{"reference": "linux-source-4.15.0"},
{"reference": "linux-tools-4.15.0"},
{"reference": "linux-tools-common"},
{"reference": "linux-tools-host"},
{"reference": "linux-udebs-aws"},
{"reference": "linux-udebs-azure"},
{"reference": "linux-udebs-generic"},
{"reference": "linux-udebs-generic-lpae"},
{"reference": "linux-udebs-kvm"},
{"reference": "linux-udebs-oem"}
]
}
]
},
"Ubuntu Linux-20.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "20.04",
"pkgs": [
{"reference": "linux-aws-5.11"},
{"reference": "linux-aws-5.13"},
{"reference": "linux-aws-5.8"},
{"reference": "linux-aws-cloud-tools-5.4.0"},
{"reference": "linux-aws-headers-5.4.0"},
{"reference": "linux-aws-tools-5.4.0"},
{"reference": "linux-azure-5.11"},
{"reference": "linux-azure-5.13"},
{"reference": "linux-azure-5.8"},
{"reference": "linux-azure-cloud-tools-5.4.0"},
{"reference": "linux-azure-fde"},
{"reference": "linux-azure-headers-5.4.0"},
{"reference": "linux-azure-tools-5.4.0"},
{"reference": "linux-bluefield"},
{"reference": "linux-buildinfo-5.4.0"},
{"reference": "linux-buildinfo-5.6.0"},
{"reference": "linux-cloud-tools-5.4.0"},
{"reference": "linux-cloud-tools-5.6.0"},
{"reference": "linux-cloud-tools-common"},
{"reference": "linux-doc"},
{"reference": "linux-gcp-5.11"},
{"reference": "linux-gcp-5.13"},
{"reference": "linux-gcp-5.8"},
{"reference": "linux-gcp-headers-5.4.0"},
{"reference": "linux-gcp-tools-5.4.0"},
{"reference": "linux-gke"},
{"reference": "linux-gke-5.15"},
{"reference": "linux-gkeop"},
{"reference": "linux-gkeop-5.15"},
{"reference": "linux-headers-5.4.0"},
{"reference": "linux-headers-5.6.0"},
{"reference": "linux-hwe-5.11"},
{"reference": "linux-hwe-5.13"},
{"reference": "linux-hwe-5.8"},
{"reference": "linux-ibm"},
{"reference": "linux-image-5.4.0"},
{"reference": "linux-image-unsigned-5.4.0"},
{"reference": "linux-image-unsigned-5.6.0"},
{"reference": "linux-intel-5.13"},
{"reference": "linux-iot"},
{"reference": "linux-kvm-cloud-tools-5.4.0"},
{"reference": "linux-kvm-headers-5.4.0"},
{"reference": "linux-kvm-tools-5.4.0"},
{"reference": "linux-libc-dev"},
{"reference": "linux-modules-5.4.0"},
{"reference": "linux-modules-5.6.0"},
{"reference": "linux-modules-extra-5.4.0"},
{"reference": "linux-modules-extra-5.6.0"},
{"reference": "linux-oem-5.10"},
{"reference": "linux-oem-5.13"},
{"reference": "linux-oem-5.14"},
{"reference": "linux-oem-5.6-headers-5.6.0"},
{"reference": "linux-oem-5.6-tools-5.6.0"},
{"reference": "linux-oem-5.6-tools-common"},
{"reference": "linux-oem-5.6-tools-host"},
{"reference": "linux-oracle-5.11"},
{"reference": "linux-oracle-5.13"},
{"reference": "linux-oracle-5.8"},
{"reference": "linux-oracle-headers-5.4.0"},
{"reference": "linux-oracle-tools-5.4.0"},
{"reference": "linux-raspi-headers-5.4.0"},
{"reference": "linux-raspi-tools-5.4.0"},
{"reference": "linux-raspi2"},
{"reference": "linux-riscv-5.11"},
{"reference": "linux-riscv-5.8"},
{"reference": "linux-riscv-headers-5.4.0"},
{"reference": "linux-riscv-tools-5.4.0"},
{"reference": "linux-source-5.4.0"},
{"reference": "linux-tools-5.4.0"},
{"reference": "linux-tools-5.6.0"},
{"reference": "linux-tools-common"},
{"reference": "linux-tools-host"},
{"reference": "linux-udebs-aws"},
{"reference": "linux-udebs-azure"},
{"reference": "linux-udebs-generic"},
{"reference": "linux-udebs-generic-lpae"},
{"reference": "linux-udebs-kvm"},
{"reference": "linux-udebs-oem"},
{"reference": "linux-xilinx-zynqmp"}
]
}
]
},
"Ubuntu Linux-22.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "22.04",
"pkgs": [
{"reference": "linux-allwinner-5.19"},
{"reference": "linux-aws-5.19"},
{"reference": "linux-aws-6.2"},
{"reference": "linux-aws-6.5"},
{"reference": "linux-azure-5.19"},
{"reference": "linux-azure-6.2"},
{"reference": "linux-azure-6.5"},
{"reference": "linux-azure-fde"},
{"reference": "linux-azure-fde-5.19"},
{"reference": "linux-azure-fde-6.2"},
{"reference": "linux-buildinfo-5.15.0"},
{"reference": "linux-buildinfo-5.17.0"},
{"reference": "linux-cloud-tools-5.15.0"},
{"reference": "linux-cloud-tools-5.17.0"},
{"reference": "linux-gcp-5.19"},
{"reference": "linux-gcp-6.2"},
{"reference": "linux-gcp-6.5"},
{"reference": "linux-headers-5.15.0"},
{"reference": "linux-headers-5.17.0"},
{"reference": "linux-hwe-5.19"},
{"reference": "linux-hwe-6.2"},
{"reference": "linux-hwe-6.5"},
{"reference": "linux-image-5.15.0"},
{"reference": "linux-image-unsigned-5.17.0"},
{"reference": "linux-intel-iot-realtime"},
{"reference": "linux-lowlatency-hwe-5.19"},
{"reference": "linux-lowlatency-hwe-6.2"},
{"reference": "linux-lowlatency-hwe-6.5"},
{"reference": "linux-modules-5.15.0"},
{"reference": "linux-modules-5.17.0"},
{"reference": "linux-modules-extra-5.15.0"},
{"reference": "linux-modules-extra-5.17.0"},
{"reference": "linux-nvidia-6.2"},
{"reference": "linux-nvidia-6.5"},
{"reference": "linux-oem-5.17-headers-5.17.0"},
{"reference": "linux-oem-5.17-tools-5.17.0"},
{"reference": "linux-oem-5.17-tools-host"},
{"reference": "linux-oem-6.0"},
{"reference": "linux-oem-6.1"},
{"reference": "linux-oem-6.5"},
{"reference": "linux-oracle-6.5"},
{"reference": "linux-realtime"},
{"reference": "linux-riscv-5.19"},
{"reference": "linux-riscv-6.5"},
{"reference": "linux-riscv-headers-5.15.0"},
{"reference": "linux-riscv-tools-5.15.0"},
{"reference": "linux-starfive-5.19"},
{"reference": "linux-starfive-6.2"},
{"reference": "linux-starfive-6.5"},
{"reference": "linux-tools-5.15.0"},
{"reference": "linux-tools-5.17.0"}
]
}
]
},
"Ubuntu Linux-24.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "24.04",
"pkgs": [
{"reference": "linux-raspi-realtime"},
{"reference": "linux-realtime"}
]
}
]
},
"Red Hat Enterprise Linux-9": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "9",
"pkgs": [
{"reference": "bpftool"},
{"reference": "kernel"},
{"reference": "kernel-64k"},
{"reference": "kernel-64k-core"},
{"reference": "kernel-64k-debug"},
{"reference": "kernel-64k-debug-core"},
{"reference": "kernel-64k-debug-devel"},
{"reference": "kernel-64k-debug-devel-matched"},
{"reference": "kernel-64k-debug-modules"},
{"reference": "kernel-64k-debug-modules-core"},
{"reference": "kernel-64k-debug-modules-extra"},
{"reference": "kernel-64k-debug-modules-internal"},
{"reference": "kernel-64k-debug-modules-partner"},
{"reference": "kernel-64k-devel"},
{"reference": "kernel-64k-devel-matched"},
{"reference": "kernel-64k-modules"},
{"reference": "kernel-64k-modules-core"},
{"reference": "kernel-64k-modules-extra"},
{"reference": "kernel-64k-modules-internal"},
{"reference": "kernel-64k-modules-partner"},
{"reference": "kernel-abi-stablelists"},
{"reference": "kernel-core"},
{"reference": "kernel-cross-headers"},
{"reference": "kernel-debug"},
{"reference": "kernel-debug-core"},
{"reference": "kernel-debug-devel"},
{"reference": "kernel-debug-devel-matched"},
{"reference": "kernel-debug-modules"},
{"reference": "kernel-debug-modules-core"},
{"reference": "kernel-debug-modules-extra"},
{"reference": "kernel-debug-modules-internal"},
{"reference": "kernel-debug-modules-partner"},
{"reference": "kernel-debug-uki-virt"},
{"reference": "kernel-debug-uki-virt-addons"},
{"reference": "kernel-devel"},
{"reference": "kernel-devel-matched"},
{"reference": "kernel-doc"},
{"reference": "kernel-headers"},
{"reference": "kernel-ipaclones-internal"},
{"reference": "kernel-modules"},
{"reference": "kernel-modules-core"},
{"reference": "kernel-modules-extra"},
{"reference": "kernel-modules-internal"},
{"reference": "kernel-modules-partner"},
{"reference": "kernel-rt"},
{"reference": "kernel-rt-64k"},
{"reference": "kernel-rt-64k-core"},
{"reference": "kernel-rt-64k-debug"},
{"reference": "kernel-rt-64k-debug-core"},
{"reference": "kernel-rt-64k-debug-devel"},
{"reference": "kernel-rt-64k-debug-devel-matched"},
{"reference": "kernel-rt-64k-debug-kvm"},
{"reference": "kernel-rt-64k-debug-modules"},
{"reference": "kernel-rt-64k-debug-modules-core"},
{"reference": "kernel-rt-64k-debug-modules-extra"},
{"reference": "kernel-rt-64k-debug-modules-internal"},
{"reference": "kernel-rt-64k-debug-modules-partner"},
{"reference": "kernel-rt-64k-devel"},
{"reference": "kernel-rt-64k-devel-matched"},
{"reference": "kernel-rt-64k-kvm"},
{"reference": "kernel-rt-64k-modules"},
{"reference": "kernel-rt-64k-modules-core"},
{"reference": "kernel-rt-64k-modules-extra"},
{"reference": "kernel-rt-64k-modules-internal"},
{"reference": "kernel-rt-64k-modules-partner"},
{"reference": "kernel-rt-core"},
{"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"},
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{"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"},
{"reference": "kernel-selftests-internal"},
{"reference": "kernel-tools"},
{"reference": "kernel-tools-libs"},
{"reference": "kernel-tools-libs-devel"},
{"reference": "kernel-uki-virt"},
{"reference": "kernel-uki-virt-addons"},
{"reference": "kernel-zfcpdump"},
{"reference": "kernel-zfcpdump-core"},
{"reference": "kernel-zfcpdump-devel"},
{"reference": "kernel-zfcpdump-devel-matched"},
{"reference": "kernel-zfcpdump-modules"},
{"reference": "kernel-zfcpdump-modules-core"},
{"reference": "kernel-zfcpdump-modules-extra"},
{"reference": "kernel-zfcpdump-modules-internal"},
{"reference": "kernel-zfcpdump-modules-partner"},
{"reference": "libperf"},
{"reference": "libperf-devel"},
{"reference": "perf"},
{"reference": "python3-perf"},
{"reference": "rtla"},
{"reference": "rv"}
]
}
]
}
};
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');
}
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