CVE-2023-53297— Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
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.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于l2cap_disconnect_rsp中未正确获取conn->chan_lock，可能导致锁平衡错误。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 26
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f2d38e77aa5f3effc143e7dd24da8acf02925958< 5f352a56f0e607e6ff539cbf12156bfd8af232be |
affected |
1351551aa9058e07a20a27a158270cf84fcde621< 6a27762340ad08643de3bc17fe1646ea489ca2e2 |
affected | ||
c02421992505c95c7f3c9ad59ee35e22eac60988< 2112c4c47d36bc5aba3ddeb9afedce6ae6a67e7d |
affected | ||
d9ba36c22a7bb09d6bac4cc2f243eff05da53f43< 55410a9144c76ecda126e6cdec556dfcd8f343b2 |
affected | ||
ac6725a634f7e8c0330610a8527f20c730b61115< 116b9c002c894097adc2b8684db2d1da4229ed46 |
affected | ||
348d446762e7c70778df8bafbdf3fa0df2123f58< fd269a0435f8e9943b7a57c5a59688848d42d449 |
affected | ||
a2a9339e1c9deb7e1e079e12e27a0265aea8421a< 5134556c9be582793f30695c09d18a26fe1ff2d7 |
affected | ||
a2a9339e1c9deb7e1e079e12e27a0265aea8421a< 25e97f7b1866e6b8503be349eeea44bb52d661ce |
affected | ||
| … +18 more rows | |||
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I. Basic Information for CVE-2023-53297
Vulnerability Information
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Vulnerability Title
Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于l2cap_disconnect_rsp中未正确获取conn->chan_lock，可能导致锁平衡错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-53297
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Linux · 2025-09-16 · 115 CVEs total
| CVE-2022-50350 | 9.8 CRITICAL | scsi: target: iscsi: Fix a race condition between login_work and the login thread |
| CVE-2025-39806 | 8.8 HIGH | HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() |
| CVE-2023-53305 | 8.8 HIGH | Bluetooth: L2CAP: Fix use-after-free |
| CVE-2025-39827 | 8.8 HIGH | net: rose: include node references in rose_neigh refcount |
| CVE-2025-39826 | 8.8 HIGH | net: rose: convert 'use' field to refcount_t |
| CVE-2023-53315 | 8.8 HIGH | wifi: ath11k: Fix SKB corruption in REO destination ring |
| CVE-2023-53322 | 8.8 HIGH | scsi: qla2xxx: Wait for io return on terminate rport |
| CVE-2025-39809 | 8.4 HIGH | HID: intel-thc-hid: intel-quicki2c: Fix ACPI dsd ICRS/ISUB length |
| CVE-2023-53333 | 8.2 HIGH | netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one |
| CVE-2025-39818 | 7.8 HIGH | HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save |
| CVE-2025-39810 | 7.8 HIGH | bnxt_en: Fix memory corruption when FW resources change during ifdown |
| CVE-2023-53311 | 7.8 HIGH | nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput |
| CVE-2023-53314 | 7.8 HIGH | fbdev/ep93xx-fb: Do not assign to struct fb_info.dev |
| CVE-2025-39815 | 7.8 HIGH | RISC-V: KVM: fix stack overrun when loading vlenb |
| CVE-2023-53286 | 7.8 HIGH | RDMA/mlx5: Return the firmware result upon destroying QP/RQ |
| CVE-2022-50341 | 7.8 HIGH | cifs: fix oops during encryption |
| CVE-2023-53331 | 7.8 HIGH | pstore/ram: Check start of empty przs during init |
| CVE-2023-53274 | 7.8 HIGH | clk: mediatek: mt8183: Add back SSPM related clocks |
| CVE-2023-53263 | 7.8 HIGH | drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector_create |
| CVE-2025-39836 | 7.8 HIGH | efi: stmm: Fix incorrect buffer allocation method |
Showing top 20 of 115 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
-
CVE-2023-7356
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SE -
CVE-2026-98869
bpf: Infer zext_dst based on static register liveness analys -
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U
V. Comments for CVE-2023-53297
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