CVE-2023-53297 — Unlock of a Resource that is not Locked in Linux

CWE-832 — Unlock of a Resource that is not Locked5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 97.47%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedSep 16

Description

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶NVDlinux/linux_kernel4.15 — 4.19.284+6
▶Debianlinux/linux_kernel< 5.10.191-1+3
▶CVEListV5linux/linuxf2d38e77aa5f3effc143e7dd24da8acf02925958 — 5f352a56f0e607e6ff539cbf12156bfd8af232be+9
▶debiandebian/linux< linux 6.1.37-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-r9g9-q5xh-mm5x: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp conn->chan_lo↗2025-09-16
▶
OSV
CVE-2023-53297: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp conn->chan_lock↗2025-09-16
▶

📋Vendor Advisories

2
Red Hat
kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp↗2025-09-16
▶
Debian
CVE-2023-53297: linux - In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ...↗2023
▶
CVE-2023-53297 — Linux vulnerability | cvebase