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CVE-2023-53016

Bluetooth: Fix possible deadlock in rfcomm_sk_state_change

Medium5.5EPSS 0.15%
Published
Updated
Reserved
Assigned by
Linux

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.

Scores

CVSS scores of CVE-2023-53016, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.15% · top 96% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

Affected products

  • Linux · Linux

    • affected 1804fdf6e494e5e2938c65d8391690b59bcff897 – < 98aec50ff7f60cc6f2d6a4396b475c547e58b04d
    • affected 1804fdf6e494e5e2938c65d8391690b59bcff897 – < 17511bd84871f4a6106cb335616e086880313f3f
    • affected 1804fdf6e494e5e2938c65d8391690b59bcff897 – < 1d80d57ffcb55488f0ec0b77928d4f82d16b6a90

  • Linux · Linux

    • affected 5.15
    • unaffected < 5.15
    • unaffected 5.15.91 – ≤ 5.15.*
    • unaffected 6.1.9 – ≤ 6.1.*
    • unaffected 6.2 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .