CVE-2025-68305

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Source
https://cve.org/CVERecord?id=CVE-2025-68305
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68305.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-68305
Downstream
BELL (1)
CLSA (5)
DEBIAN (1)
MGASA (2)
OESA (3)
openSUSE (1)
RHSA (2)
RLSA (2)
ROOT (2)
SUSE (13)
UBUNTU (1)
Related
ALSA (2)
openSUSE (1)
SUSE (13)
Published
2025-12-16T15:06:22Z
Modified
2026-10-16T02:30:55Z
Summary
Bluetooth: hci_sock: Prevent race in socket write iter and sock bind
Details

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

Bluetooth: hci_sock: Prevent race in socket write iter and sock bind

There is a potential race condition between sock bind and socket write iter. bind may free the same cmd via mgmt_pending before write iter sends the cmd, just as syzbot reported in UAF[1].

Here we use hci_dev_lock to synchronize the two, thereby avoiding the UAF mentioned in [1].

[1] syzbot reported: BUG: KASAN: slab-use-after-free in mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316 Read of size 8 at addr ffff888077164818 by task syz.0.17/5989 Call Trace: mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316 set_link_security+0x5c2/0x710 net/bluetooth/mgmt.c:1918 hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719 hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 sock_write_iter+0x279/0x360 net/socket.c:1195

Allocated by task 5989: mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296 set_link_security+0x557/0x710 net/bluetooth/mgmt.c:1910 hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719 hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 sock_write_iter+0x279/0x360 net/socket.c:1195

Freed by task 5991: mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline] mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257 mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9477 hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1314

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68305.json"
}
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
7b5958332f20dc66b19be564c402dbc21b927a81
Fixed
7344feaed3c8aa46d397984ae855e6026d3c3e95
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
bdd56875c6926d8009914f427df71797693e90d4
Fixed
fe68510fc99bb4b88c9c611f83699749002d515a
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
4e83f2dbb2bf677e614109df24426c4dded472d4
Fixed
e90c05fc5bbea956450a05cc3b36b8fa29cf195e
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6fe26f694c824b8a4dbf50c635bee1302e3f099c
Fixed
69fcb0344bc0dd5b13d7e4e98f8b6bf25a6d4ff7
Fixed
89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6.6.94
Fixed
6.6.119
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6.12.34
Fixed
6.12.61
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6.15.3
Fixed
6.16
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d7882db79135c829a922daf3571f33ea1e056ae3

Affected versions

v6.*
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
v6.15.10
v6.15.11
v6.15.3
v6.15.4
v6.15.5
v6.15.6
v6.15.7
v6.15.8
v6.15.9
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
v6.6.94
v6.6.95
v6.6.96
v6.6.97
v6.6.98
v6.6.99

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68305.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.6.119
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.61
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.17.11

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68305.json"