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CVE-2026-46138— Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt

CVSS 8.1 · High EPSS 0.02% · P4

Possible ATT&CK Techniques 1AI

T1207 · Rogue Domain Controller

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxa0bfde167b506423111ddb8cd71930497a40fc54< 6cb7f67bc28da787499291a562d49a084d9c90cdaffected
a0bfde167b506423111ddb8cd71930497a40fc54< 22559ad7654f61727fc270ee4893da9f4b70cf17affected
a0bfde167b506423111ddb8cd71930497a40fc54< 77981a507aa0fc001dc37f0dd6631dd2042fed17affected
a0bfde167b506423111ddb8cd71930497a40fc54< 665da0baaf0396f9ed3c86ccb3955dcd0b73e774affected
a0bfde167b506423111ddb8cd71930497a40fc54< 5ddb8014261137cadaf83ab5617a588d80a22586affected
b475c1109251e30ec21fb574d72a1c71a4ab0039affected
2ccde10127447c1a5caad8469fede945bdb62fdfaffected
6.4.16< 6.5affected
… +8 more rows
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I. Basic Information for CVE-2026-46138

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt hci_le_create_big_complete_evt() iterates over BT_BOUND connections for a BIG handle using a while loop, accessing ev->bis_handle[i++] on each iteration. However, there is no check that i stays within ev->num_bis before the array access. When a controller sends a LE_Create_BIG_Complete event with fewer bis_handle entries than there are BT_BOUND connections for that BIG, or with num_bis=0, the loop reads beyond the valid bis_handle[] flex array into adjacent heap memory. Since the out-of-bounds values typically exceed HCI_CONN_HANDLE_MAX (0x0EFF), hci_conn_set_handle() rejects them and the connection remains in BT_BOUND state. The same connection is then found again by hci_conn_hash_lookup_big_state(), creating an infinite loop with hci_dev_lock held. Fix this by terminating the BIG if in case not all BIS could be setup properly.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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hci_le_create_big_complete_evt中越界读取和无限循环，可能导致系统挂起。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux a0bfde167b506423111ddb8cd71930497a40fc54 ~ 6cb7f67bc28da787499291a562d49a084d9c90cd -
LinuxLinux 6.6 -

II. Public POCs for CVE-2026-46138

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III. Intelligence Information for CVE-2026-46138

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Patches & Fixes for CVE-2026-46138 (5)

Same Patch Batch · Linux · 2026-05-28 · 138 CVEs total

CVE-2026-461379.8 CRITICALmptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-461359.8 CRITICALnvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-461959.8 CRITICALsmb: client: validate dacloffset before building DACL pointers
CVE-2026-461159.8 CRITICALblock: add pgmap check to biovec_phys_mergeable
CVE-2026-461199.1 CRITICALlibceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-461559.1 CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-461859.1 CRITICALsmb/client: fix out-of-bounds read in symlink_data()
CVE-2026-461258.8 HIGHwifi: mac80211: remove station if connection prep fails
CVE-2026-461138.8 HIGHKVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-462388.8 HIGHbatman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-462128.8 HIGHbatman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-461748.8 HIGHx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-461528.8 HIGHwifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-461668.8 HIGHwifi: mac80211: use safe list iteration in radar detect work
CVE-2026-461988.8 HIGHbatman-adv: fix integer overflow on buff_pos
CVE-2026-462328.1 HIGHHID: playstation: Clamp num_touch_reports
CVE-2026-461457.8 HIGHRDMA/mana: Validate rx_hash_key_len
CVE-2026-462407.8 HIGHmedia: iris: Fix use-after-free in iris_release_internal_buffers()
CVE-2026-461767.8 HIGHRDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()
CVE-2026-461577.8 HIGHALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46138

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