CVE-2026-90256
- Source
- https://cve.org/CVERecord?id=CVE-2026-90256
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90256.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-90256
- Downstream
- Related
- Published
- 2026-09-17T16:07:55Z
- Modified
- 2026-10-08T02:53:18Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
hci_conn::l2cap_data is accessed without locks in l2cap_disconn_ind via hci_conn_timeout (disc_work) -> hci_proto_disconn_ind -> l2cap_disconn_ind. This is UAF if the l2cap_conn is deleted concurrently.
disc_work is disabled sync in hci_conn_del(), so we cannot take hci_dev_lock in disc_work.
Fix by using proto_lock to guard l2cap_data, in addition to hdev->lock which is held in other access paths.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90256.json" }- References
-
- https://git.kernel.org/stable/c/2b66c83ff1751d6bd3201b3017206262ab46dc05
- https://git.kernel.org/stable/c/b495a3a9b33bc4e4613e685bf5c96c136caa22d8
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90256.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-90256
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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
-
Introducedab4eedb790cae44313759b50fe47da285e2519d5Fixedb495a3a9b33bc4e4613e685bf5c96c136caa22d8Fixed2b66c83ff1751d6bd3201b3017206262ab46dc05
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.84Fixed6.7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.20Fixed6.13
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.13.8Fixed6.14
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedefc30877bd4bc85fefe98d80af60fafc86e5775e
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf87271d21dd4ee83857ca11b94e7b4952749bbae
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced18ab6b6078fa8191ca30a3065d57bf35d5635761
Affected versions
v6.*
v6.12.100
v6.12.101
v6.12.102
v6.12.103
v6.12.104
v6.12.105
v6.12.106
v6.12.107
v6.12.108
v6.12.109
v6.12.110
v6.12.111
v6.12.112
v6.12.20
v6.12.21
v6.12.22
v6.12.23
v6.12.24
v6.12.25
v6.12.26
v6.12.27
v6.12.28
v6.12.29
v6.12.30
v6.12.31
v6.12.32
v6.12.33
v6.12.34
v6.12.35
v6.12.36
v6.12.37
v6.12.38
v6.12.39
v6.12.40
v6.12.41
v6.12.42
v6.12.43
v6.12.44
v6.12.45
v6.12.46
v6.12.47
v6.12.48
v6.12.49
v6.12.50
v6.12.51
v6.12.52
v6.12.53
v6.12.54
v6.12.55
v6.12.56
v6.12.57
v6.12.58
v6.12.59
v6.12.60
v6.12.61
v6.12.62
v6.12.63
v6.12.64
v6.12.65
v6.12.66
v6.12.67
v6.12.68
v6.12.69
v6.12.70
v6.12.71
v6.12.72
v6.12.73
v6.12.74
v6.12.75
v6.12.76
v6.12.77
v6.12.78
v6.12.79
v6.12.80
v6.12.81
v6.12.82
v6.12.83
v6.12.84
v6.12.85
v6.12.86
v6.12.87
v6.12.88
v6.12.89
v6.12.90
v6.12.91
v6.12.92
v6.12.93
v6.12.94
v6.12.95
v6.12.96
v6.12.97
v6.12.98
v6.12.99
v6.13.10
v6.13.11
v6.13.12
v6.13.8
v6.13.9
v6.6.100
v6.6.101
v6.6.102
v6.6.103
v6.6.104
v6.6.105
v6.6.106
v6.6.107
v6.6.108
v6.6.109
v6.6.110
v6.6.111
v6.6.112
v6.6.113
v6.6.114
v6.6.115
v6.6.116
v6.6.117
v6.6.118
v6.6.119
v6.6.120
v6.6.121
v6.6.122
v6.6.123
v6.6.124
v6.6.125
v6.6.126
v6.6.127
v6.6.128
v6.6.129
v6.6.130
v6.6.131
v6.6.132
v6.6.133
v6.6.134
v6.6.135
v6.6.136
v6.6.137
v6.6.138
v6.6.139
v6.6.140
v6.6.141
v6.6.142
v6.6.143
v6.6.144
v6.6.145
v6.6.146
v6.6.147
v6.6.148
v6.6.149
v6.6.150
v6.6.151
v6.6.152
v6.6.153
v6.6.154
v6.6.155
v6.6.156
v6.6.157
v6.6.158
v6.6.84
v6.6.85
v6.6.86
v6.6.87
v6.6.88
v6.6.89
v6.6.90
v6.6.91
v6.6.92
v6.6.93
v6.6.94
v6.6.95
v6.6.96
v6.6.97
v6.6.98
v6.6.99