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NVD Vulnerability Details :
CVE-2026-64206
Received
More InfoOfficial Page
Source-416baaa9-dc9f-4396-8d5f-8c081fb06d67
View Known Exploited Vulnerability (KEV) details
Published At-20 Jul, 2026 | 17:18
Updated At-20 Jul, 2026 | 17:18

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: cancel pending_rx_work before taking conn->lock l2cap_conn_del() takes conn->lock and then calls cancel_work_sync() for pending_rx_work. process_pending_rx() takes the same mutex, so teardown can deadlock against the worker it is flushing. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the l2cap_conn_ready() -> queue_work(..., &conn->pending_rx_work) submit path, the l2cap_conn_del() -> cancel_work_sync(&conn->pending_rx_work) teardown path, and the process_pending_rx() -> mutex_lock(&conn->lock) worker edge. Lockdep WARNING: possible circular locking dependency detected process_pending_rx+0x21/0x2a [vuln_msv] l2cap_conn_del.constprop.0+0x3f/0x4e [vuln_msv] *** DEADLOCK *** Cancel pending_rx_work before taking conn->lock, matching the existing lock-before-drain ordering used for the two delayed works in the same teardown path. The pending_rx queue is still purged after the work has been cancelled and conn->lock has been acquired.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
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Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
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References
HyperlinkSourceResource
https://git.kernel.org/stable/c/2641a9e0a1dd4af2e21995470a21d55dd35e5203416baaa9-dc9f-4396-8d5f-8c081fb06d67
N/A
https://git.kernel.org/stable/c/d5616beb3355b5fca2280d796c1cf7ada4ee6551416baaa9-dc9f-4396-8d5f-8c081fb06d67
N/A
https://git.kernel.org/stable/c/e96fbac8d3a73b0bc165383c092a30628561d320416baaa9-dc9f-4396-8d5f-8c081fb06d67
N/A
Hyperlink: https://git.kernel.org/stable/c/2641a9e0a1dd4af2e21995470a21d55dd35e5203
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/d5616beb3355b5fca2280d796c1cf7ada4ee6551
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/e96fbac8d3a73b0bc165383c092a30628561d320
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Resource: N/A
Change History
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