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CVE-2026-90253— Bluetooth: MGMT: free the mesh send cancel command when it is cancelled

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： 蓝牙：MGMT：当 mesh 发送取消命令被取消时，释放该命令 mesh_send_cancel() 将待处理命令以 NULL 销毁回调（destroy callback）的方式入队，因此只有当 send_cancel() 实际执行时才会释放该命令。被取消的命令条目会引发内存泄漏，因为 _hci_cmd_sync_cancel_entry() 在没有销毁回调的情况下不会释放 entry->data，而 hci_cmd_sync_clear() 在控制器注销时会取消所有待

AI Predicted 3.2 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux b338d91703fae6f6afd67f3f75caa3b8f36ddef3< b609341ee56967d9a45845ff26f79336d2114b55 affected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3< 416fabca9b7237b76aa9cafcf8c497b8ac00d88c affected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3< 88e30d036d777b00aed42bd35000de23ff40910c affected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3< 05438d338a875a9daa08ca3f6a35b4480cf13de4 affected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3< fa46d428c014e7b72a18634679815670418e67dc affected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3< 3c742feda8fcabf741a17bcf668b63c8f606f9c5 affected
6.1 affected
< 6.1 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-90253

Vulnerability Information
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Vulnerability Title
Bluetooth: MGMT: free the mesh send cancel command when it is cancelled
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: free the mesh send cancel command when it is cancelled mesh_send_cancel() queues the pending command with a NULL destroy callback, so it is only freed if send_cancel() runs. A cancelled entry is leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when there is no destroy callback, and hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. Nothing else reclaims it either: mgmt_pending_new() does not put the command on hdev->mgmt_pending. The leak also pins the socket reference taken by mgmt_pending_new(), so the mgmt socket is never released. Free the command from a destroy callback.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b338d91703fae6f6afd67f3f75caa3b8f36ddef3 ~ b609341ee56967d9a45845ff26f79336d2114b55 -
Linux Linux 6.1 -

II. Public POCs for CVE-2026-90253

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III. Intelligence Information for CVE-2026-90253

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Patches & Fixes for CVE-2026-90253 (4)

Other References for CVE-2026-90253 (2)

Same Patch Batch · Linux · 2026-09-17 · 602 CVEs total

CVE-2026-90257 Bluetooth: virtio_bt: avoid OOB read of build info string
CVE-2026-90238 media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
CVE-2026-90240 iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90239 media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
CVE-2026-90241 iommu/vt-d: Tear down scalable-mode context on probe failure
CVE-2026-90243 iommu/vt-d: Clear Present bit before tearing down copied context entry
CVE-2026-90242 iommu/vt-d: Fix iopf_refcount leak on RID domain replacement
CVE-2026-90244 iommu/dma: Restore locking around msi_page_list
CVE-2026-90245 fbdev: kyro: Validate overlay viewport coordinates
CVE-2026-90246 apparmor: fix integer overflow in verify_tags() bounds check
CVE-2026-90247 bpf: Fix mmap_lock leak in irq_work path
CVE-2026-90248 net/sched: cls_api: fix teardown of an adopted proto on insert-race loss
CVE-2026-90249 iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
CVE-2026-90250 bpf, cgroup: Fix storage null-ptr-deref after replacing prog
CVE-2026-90251 Bluetooth: MSFT: validate evt_prefix_len against the response length
CVE-2026-90252 Bluetooth: MGMT: free the HCI command when it is cancelled
CVE-2026-90254 Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths
CVE-2026-90256 Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90255 Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90267 scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails

Showing top 20 of 602 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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