Linux Distros Unpatched Vulnerability : CVE-2026-68372
| Reporter | Title | Published | Views | Family All 9 |
|---|---|---|---|---|
| CVE-2026-68372 | 10 Aug 202612:03 | – | cve | |
| CVE-2026-68372 usb: core: port: Deattach Type-C connector on component unbind | 10 Aug 202612:03 | – | cvelist | |
| CVE-2026-68372 | 10 Aug 202612:03 | – | debiancve | |
| EUVD-2026-55473 | 10 Aug 202612:03 | – | euvd | |
| CVE-2026-68372 | 10 Aug 202613:20 | – | nvd | |
| BELL-CVE-2026-68372 | 12 Aug 202606:04 | – | osv | |
| DEBIAN-CVE-2026-68372 | 10 Aug 202613:20 | – | osv | |
| UBUNTU-CVE-2026-68372 | 11 Aug 202600:00 | – | osv | |
| CVE-2026-68372 | 11 Aug 202616:45 | – | redhatcve |
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# (C) Tenable, Inc.
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patch available.
- In the Linux kernel, the following vulnerability has been resolved: usb: core: port: Deattach Type-C
connector on component unbind connector_unbind() is the mirror of connector_bind(), but it is missing the
symmetric call to typec_deattach() that connector_bind() makes via: if (port_dev->child)
typec_attach(port_dev->connector, &port_dev->child->dev); When a Thunderbolt dock is unplugged, two
teardown paths race: 1. The component framework calls connector_unbind() first, which sets
port_dev->connector = NULL without calling typec_deattach(). This leaves port->usb2_dev/port->usb3_dev in
struct typec_port pointing at the USB device that is about to be freed. 2. usb_disconnect() then calls
typec_deattach(port_dev->connector, ...), but port_dev->connector is already NULL, so the call is a no-op
and port->usb2_dev is never cleared. 3. Concurrently, UCSI detects a PD partner-disconnect event and calls
typec_unregister_partner(), which reads port->usb2_dev (now a dangling pointer to freed memory) and passes
it to typec_partner_unlink_device() -> sysfs_remove_link() -> dev_name() on the freed device, corrupting
the typec/UCSI partner state. This corruption leaves the Thunderbolt tunnel in an inconsistent state on
the next dock hot-plug. On affected hardware the dock's I225/igc NIC fails to enumerate: AER fires a slot
reset while the igc driver is still initialising (PCIe link lost), and the subsequent igc_reset attempt
hits igc_rd32 on an already-detached device: igc 0000:2e:00.0 eth0: PCIe link lost, device now detached
igc: Failed to read reg 0x0! WARNING: CPU: 9 PID: 129 at drivers/net/ethernet/intel/igc/igc_main.c:7005
igc_rd32+0xa4/0xc0 [igc] Call Trace: igc_disable_pcie_master+0x16/0xa0 [igc] igc_reset_hw_base+0x14/0x170
[igc] igc_reset+0x63/0x110 [igc] igc_io_slot_reset+0x9e/0xd0 [igc] report_slot_reset+0x5d/0xc0
pcie_do_recovery+0x209/0x400 aer_isr_one_error_type+0x235/0x430 aer_isr+0x4e/0x80 irq_thread+0xf4/0x1f0 4.
UCSI later handles the PD partner-disconnect and calls typec_unregister_partner(), which still sees the
stale port->usb2_dev and tries to remove its sysfs link a second time: kernfs: can not remove 'typec', no
directory WARNING: CPU: 6 PID: 55 at fs/kernfs/dir.c:1706 kernfs_remove_by_name_ns+0xe9/0xf0 Workqueue:
events ucsi_handle_connector_change [typec_ucsi] Call Trace: sysfs_remove_link+0x19/0x50
typec_unregister_partner+0x6e/0x120 [typec] ucsi_unregister_partner+0x107/0x150 [typec_ucsi]
ucsi_handle_connector_change+0x3ec/0x490 [typec_ucsi] process_one_work+0x18e/0x3e0
worker_thread+0x2e3/0x420 kthread+0x10a/0x230 ret_from_fork+0x121/0x140 ret_from_fork_asm+0x1a/0x30 With
worse timing the same stale pointer is dereferenced after the backing memory is freed, turning the warning
into a use-after-free. Fix the asymmetry: call typec_deattach() before clearing port_dev->connector,
matching what connector_bind() does on the bind side. typec_partner_deattach() is already protected by
port->partner_link_lock, so it serialises safely with the concurrent typec_unregister_partner() path.
(CVE-2026-68372)
Note that Nessus relies on the presence of the package as reported by the vendor.");
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{"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"},
{"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"},
{"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 third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
var third_party_vendors = distro_constraints_values['third_party'];
if (!empty_or_null(third_party_vendors)) {
var vendor;
foreach vendor (third_party_vendors) {
if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
}
}
}
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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11 Aug 2026 00:00Current
5.3Medium risk
Vulners AI Score5.3
EPSS0.00168