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CVE-2023-53016— Bluetooth: Fix possible deadlock in rfcomm_sk_state_change

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，该漏洞源于蓝牙rfcomm存在死锁风险。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.15% · P4

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 1804fdf6e494e5e2938c65d8391690b59bcff897< 98aec50ff7f60cc6f2d6a4396b475c547e58b04d affected
1804fdf6e494e5e2938c65d8391690b59bcff897< 17511bd84871f4a6106cb335616e086880313f3f affected
1804fdf6e494e5e2938c65d8391690b59bcff897< 1d80d57ffcb55488f0ec0b77928d4f82d16b6a90 affected
5.15 affected
< 5.15 unaffected
5.15.91≤ 5.15.* unaffected
6.1.9≤ 6.1.* unaffected
6.2≤ * unaffected
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I. Basic Information for CVE-2023-53016

Vulnerability Information
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Vulnerability Title
Bluetooth: Fix possible deadlock in rfcomm_sk_state_change
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix possible deadlock in rfcomm_sk_state_change syzbot reports a possible deadlock in rfcomm_sk_state_change [1]. While rfcomm_sock_connect acquires the sk lock and waits for the rfcomm lock, rfcomm_sock_release could have the rfcomm lock and hit a deadlock for acquiring the sk lock. Here's a simplified flow: rfcomm_sock_connect: lock_sock(sk) rfcomm_dlc_open: rfcomm_lock() rfcomm_sock_release: rfcomm_sock_shutdown: rfcomm_lock() __rfcomm_dlc_close: rfcomm_k_state_change: lock_sock(sk) This patch drops the sk lock before calling rfcomm_dlc_open to avoid the possible deadlock and holds sk's reference count to prevent use-after-free after rfcomm_dlc_open completes.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于蓝牙rfcomm存在死锁风险。
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 1804fdf6e494e5e2938c65d8391690b59bcff897 ~ 98aec50ff7f60cc6f2d6a4396b475c547e58b04d -
Linux Linux 5.15 -

II. Public POCs for CVE-2023-53016

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III. Intelligence Information for CVE-2023-53016

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Same Patch Batch · Linux · 2025-03-27 · 124 CVEs total

CVE-2023-53006 9.8 CRITICAL cifs: Fix oops due to uncleared server->smbd_conn in reconnect
CVE-2025-21876 8.8 HIGH iommu/vt-d: Fix suspicious RCU usage
CVE-2025-21890 8.2 HIGH idpf: fix checksums set in idpf_rx_rsc()
CVE-2023-52983 7.8 HIGH block, bfq: fix uaf for bfqq in bic_set_bfqq()
CVE-2023-52930 7.8 HIGH drm/i915: Fix potential bit_17 double-free
CVE-2023-52931 7.8 HIGH drm/i915: Avoid potential vm use-after-free
CVE-2023-52934 7.8 HIGH mm/MADV_COLLAPSE: catch !none !huge !bad pmd lookups
CVE-2023-52935 7.8 HIGH mm/khugepaged: fix ->anon_vma race
CVE-2025-21867 7.8 HIGH bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()
CVE-2022-49760 7.8 HIGH mm/hugetlb: fix PTE marker handling in hugetlb_change_protection()
CVE-2023-52973 7.8 HIGH vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF
CVE-2023-52974 7.8 HIGH scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress
CVE-2023-52975 7.8 HIGH scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress
CVE-2023-53009 7.8 HIGH drm/amdkfd: Add sync after creating vram bo
CVE-2023-53033 7.8 HIGH netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits
CVE-2023-53028 7.8 HIGH Revert "wifi: mac80211: fix memory leak in ieee80211_if_add()"
CVE-2023-53026 7.8 HIGH RDMA/core: Fix ib block iterator counter overflow
CVE-2023-53023 7.8 HIGH net: nfc: Fix use-after-free in local_cleanup()
CVE-2023-53021 7.8 HIGH net/sched: sch_taprio: fix possible use-after-free
CVE-2023-52988 7.8 HIGH ALSA: hda/via: Avoid potential array out-of-bound in add_secret_dac_path()

Showing top 20 of 124 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53016

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