CVE-2023-53016

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-53016
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53016.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-53016
Downstream
Related
Published
2025-03-27T16:43:44Z
Modified
2025-10-16T14:14:00.893718Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Bluetooth: Fix possible deadlock in rfcomm_sk_state_change
Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: Fix possible deadlock in rfcommskstate_change

syzbot reports a possible deadlock in rfcommskstatechange [1]. While rfcommsockconnect acquires the sk lock and waits for the rfcomm lock, rfcommsock_release could have the rfcomm lock and hit a deadlock for acquiring the sk lock. Here's a simplified flow:

rfcommsockconnect: locksock(sk) rfcommdlcopen: rfcommlock()

rfcommsockrelease: rfcommsockshutdown: rfcommlock() _rfcommdlcclose: rfcommkstatechange: locksock(sk)

This patch drops the sk lock before calling rfcommdlcopen to avoid the possible deadlock and holds sk's reference count to prevent use-after-free after rfcommdlcopen completes.

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1804fdf6e494e5e2938c65d8391690b59bcff897
Fixed
98aec50ff7f60cc6f2d6a4396b475c547e58b04d
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1804fdf6e494e5e2938c65d8391690b59bcff897
Fixed
17511bd84871f4a6106cb335616e086880313f3f
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1804fdf6e494e5e2938c65d8391690b59bcff897
Fixed
1d80d57ffcb55488f0ec0b77928d4f82d16b6a90

Affected versions

v5.*

v5.14
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.45
v5.15.46
v5.15.47
v5.15.48
v5.15.49
v5.15.5
v5.15.50
v5.15.51
v5.15.52
v5.15.53
v5.15.54
v5.15.55
v5.15.56
v5.15.57
v5.15.58
v5.15.59
v5.15.6
v5.15.60
v5.15.61
v5.15.62
v5.15.63
v5.15.64
v5.15.65
v5.15.66
v5.15.67
v5.15.68
v5.15.69
v5.15.7
v5.15.70
v5.15.71
v5.15.72
v5.15.73
v5.15.74
v5.15.75
v5.15.76
v5.15.77
v5.15.78
v5.15.79
v5.15.8
v5.15.80
v5.15.81
v5.15.82
v5.15.83
v5.15.84
v5.15.85
v5.15.86
v5.15.87
v5.15.88
v5.15.89
v5.15.9
v5.15.90
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8

v6.*

v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
v6.1.2
v6.1.3
v6.1.4
v6.1.5
v6.1.6
v6.1.7
v6.1.8
v6.2-rc1
v6.2-rc2
v6.2-rc3

Database specific

vanir_signatures

[
    {
        "signature_type": "Line",
        "id": "CVE-2023-53016-43fd1db0",
        "target": {
            "file": "net/bluetooth/rfcomm/sock.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@17511bd84871f4a6106cb335616e086880313f3f",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "293544482282652225814435047686839185495",
                "241703222409203014918754212455343408980",
                "41029236433386118443373130351392219876",
                "255666877071186605727813374382108612107",
                "125952738305689412782340243383706822781",
                "197392869392223757689631258111201942592",
                "292847244176492383467079947907746238411",
                "139126654219527833759859258591639649916",
                "272037162081119188664498511914131955463",
                "184830193619140928247025310894043962235",
                "22764728914122676010232525561974586877",
                "126709691600343261641769681464745656824",
                "296396582326643495265548785277344422190"
            ]
        }
    },
    {
        "signature_type": "Function",
        "id": "CVE-2023-53016-62976e32",
        "target": {
            "function": "rfcomm_sock_connect",
            "file": "net/bluetooth/rfcomm/sock.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@98aec50ff7f60cc6f2d6a4396b475c547e58b04d",
        "digest": {
            "function_hash": "75500296696873166781747932475475410779",
            "length": 985.0
        }
    },
    {
        "signature_type": "Function",
        "id": "CVE-2023-53016-78875ddd",
        "target": {
            "function": "rfcomm_sock_connect",
            "file": "net/bluetooth/rfcomm/sock.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@17511bd84871f4a6106cb335616e086880313f3f",
        "digest": {
            "function_hash": "75500296696873166781747932475475410779",
            "length": 985.0
        }
    },
    {
        "signature_type": "Line",
        "id": "CVE-2023-53016-d37fc671",
        "target": {
            "file": "net/bluetooth/rfcomm/sock.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@98aec50ff7f60cc6f2d6a4396b475c547e58b04d",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "293544482282652225814435047686839185495",
                "241703222409203014918754212455343408980",
                "41029236433386118443373130351392219876",
                "255666877071186605727813374382108612107",
                "125952738305689412782340243383706822781",
                "197392869392223757689631258111201942592",
                "292847244176492383467079947907746238411",
                "139126654219527833759859258591639649916",
                "272037162081119188664498511914131955463",
                "184830193619140928247025310894043962235",
                "22764728914122676010232525561974586877",
                "126709691600343261641769681464745656824",
                "296396582326643495265548785277344422190"
            ]
        }
    },
    {
        "signature_type": "Function",
        "id": "CVE-2023-53016-eda98e0b",
        "target": {
            "function": "rfcomm_sock_connect",
            "file": "net/bluetooth/rfcomm/sock.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@1d80d57ffcb55488f0ec0b77928d4f82d16b6a90",
        "digest": {
            "function_hash": "75500296696873166781747932475475410779",
            "length": 985.0
        }
    },
    {
        "signature_type": "Line",
        "id": "CVE-2023-53016-f6ab9735",
        "target": {
            "file": "net/bluetooth/rfcomm/sock.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@1d80d57ffcb55488f0ec0b77928d4f82d16b6a90",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "293544482282652225814435047686839185495",
                "241703222409203014918754212455343408980",
                "41029236433386118443373130351392219876",
                "255666877071186605727813374382108612107",
                "125952738305689412782340243383706822781",
                "197392869392223757689631258111201942592",
                "292847244176492383467079947907746238411",
                "139126654219527833759859258591639649916",
                "272037162081119188664498511914131955463",
                "184830193619140928247025310894043962235",
                "22764728914122676010232525561974586877",
                "126709691600343261641769681464745656824",
                "296396582326643495265548785277344422190"
            ]
        }
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.15.0
Fixed
5.15.91
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.9