CVE ID :CVE-2026-64206<\/p>\n
Published : July 20, 2026, 5:18 p.m. | 25\u00a0minutes ago<\/p>\n
Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: cancel pending_rx_work before taking conn->lock<\/p>\n
l2cap_conn_del() takes conn->lock and then calls cancel_work_sync() for
\npending_rx_work. process_pending_rx() takes the same mutex, so teardown
\ncan deadlock against the worker it is flushing.<\/p>\n
This issue was found by our static analysis tool and then manually
\nreviewed against the current tree.<\/p>\n
The grounded PoC kept the l2cap_conn_ready() -> queue_work(…,
\n&conn->pending_rx_work) submit path, the l2cap_conn_del() ->
\ncancel_work_sync(&conn->pending_rx_work) teardown path, and the
\nprocess_pending_rx() -> mutex_lock(&conn->lock) worker edge. Lockdep<\/p>\n
WARNING: possible circular locking dependency detected
\n process_pending_rx+0x21\/0x2a [vuln_msv]\n l2cap_conn_del.constprop.0+0x3f\/0x4e [vuln_msv]\n *** DEADLOCK ***<\/p>\n
Cancel pending_rx_work before taking conn->lock, matching the existing
\nlock-before-drain ordering used for the two delayed works in the same
\nteardown path. The pending_rx queue is still purged after the work has
\nbeen cancelled and conn->lock has been acquired.<\/p>\n
Severity: 0.0 | NA<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID :CVE-2026-64206 Published : July 20, 2026, 5:18 p.m. | 25\u00a0minutes ago Description :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. …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82296","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82296"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82296\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}