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CVE-2023-53374— Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early

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，该漏洞源于未正确清理SCO和ISO连接，可能导致释放后重用。

CVSS 8.8 · High EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f< 397d58007532644b35fad746da48c41161f32a57 affected
ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f< e94b898463a62b72a2a8b75dea8936bf4db78e00 affected
ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f< 3344d318337d9dca928fd448e966557ec5063f85 affected
75e35bd4b7935ceed2aacd82f55940e73bf0b63b affected
6.3.8< 6.4 affected
6.4 affected
< 6.4 unaffected
6.4.16≤ 6.4.* unaffected
… +2 more rows
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I. Basic Information for CVE-2023-53374

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early Not calling hci_(dis)connect_cfm before deleting conn referred to by a socket generally results to use-after-free. When cleaning up SCO connections when the parent ACL is deleted too early, use hci_conn_failed to do the connection cleanup properly. We also need to clean up ISO connections in a similar situation when connecting has started but LE Create CIS is not yet sent, so do it too here.
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，该漏洞源于未正确清理SCO和ISO连接，可能导致释放后重用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f ~ 397d58007532644b35fad746da48c41161f32a57 -
Linux Linux 6.4 -

II. Public POCs for CVE-2023-53374

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III. Intelligence Information for CVE-2023-53374

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

CVE-2022-50410 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READ
CVE-2022-50401 9.8 CRITICAL nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
CVE-2023-53382 9.8 CRITICAL net/smc: Reset connection when trying to use SMCRv2 fails.
CVE-2022-50419 8.8 HIGH Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times
CVE-2023-53431 8.8 HIGH scsi: ses: Handle enclosure with just a primary component gracefully
CVE-2023-53432 8.8 HIGH firewire: net: fix use after free in fwnet_finish_incoming_packet()
CVE-2022-50413 8.8 HIGH wifi: mac80211: fix use-after-free
CVE-2022-50386 8.8 HIGH Bluetooth: L2CAP: Fix user-after-free
CVE-2023-53372 8.2 HIGH sctp: fix a potential overflow in sctp_ifwdtsn_skip
CVE-2022-50399 7.8 HIGH media: atomisp: prevent integer overflow in sh_css_set_black_frame()
CVE-2023-53398 7.8 HIGH mlx5: fix possible ptp queue fifo use-after-free
CVE-2023-53394 7.8 HIGH net/mlx5e: xsk: Fix crash on regular rq reactivation
CVE-2022-50417 7.8 HIGH drm/panfrost: Fix GEM handle creation ref-counting
CVE-2023-53429 7.8 HIGH btrfs: don't check PageError in __extent_writepage
CVE-2023-53387 7.8 HIGH scsi: ufs: core: Fix device management cmd timeout flow
CVE-2023-53373 7.8 HIGH crypto: seqiv - Handle EBUSY correctly
CVE-2023-53426 7.8 HIGH xsk: Fix xsk_diag use-after-free error during socket cleanup
CVE-2023-53386 7.8 HIGH Bluetooth: Fix potential use-after-free when clear keys
CVE-2023-53388 7.8 HIGH drm/mediatek: Clean dangling pointer on bind error path
CVE-2023-53376 7.8 HIGH scsi: mpi3mr: Use number of bits to manage bitmap sizes

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53374

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