Bug 2395681 (CVE-2023-53297) - CVE-2023-53297 kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
Summary: CVE-2023-53297 kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_di...
Keywords:
Status: NEW
Alias: CVE-2023-53297
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-16 09:03 UTC by OSIDB Bzimport
Modified: 2025-09-30 13:37 UTC (History)
0 users

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Description OSIDB Bzimport 2025-09-16 09:03:07 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp

conn->chan_lock isn't acquired before l2cap_get_chan_by_scid,
if l2cap_get_chan_by_scid returns NULL, then 'bad unlock balance'
is triggered.
Comment 1 Keith Grant 2025-09-16 14:19:45 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091627-CVE-2023-53297-8746@gregkh/T
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