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CVE-2026-80763— Bluetooth: hci_event: validate LE Set CIG Parameters response

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于Bluetooth hci_event对LE Set CIG Parameters响应的验证不充分，仅验证固定部分后信任num_handles并读取尾部句柄数组，未确认剩余skb数据是否包含所有句柄，可能导致截断响应引发越界读取。

AI Predicted 5.5 Difficulty: Hard EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 26afbd826ee326e63a334c37fd45e82e50a615ec< 9e05783d0bb96a7b853cc058a7c7de2dc4a62154 affected
26afbd826ee326e63a334c37fd45e82e50a615ec< 26741d178f31932c9018b36b7953e6dc391436a4 affected
26afbd826ee326e63a334c37fd45e82e50a615ec< a34df5c4a439cfc04565fa5be608ed1e53134f1f affected
26afbd826ee326e63a334c37fd45e82e50a615ec< e3f82e8f2a5915f533b57a065e9a045aa2ee03bc affected
26afbd826ee326e63a334c37fd45e82e50a615ec< d83ecb7b96105d932dabaa56ccd7418c25fb7cbb affected
26afbd826ee326e63a334c37fd45e82e50a615ec< 6fc540e835dddb518cef3ff522b780f701cd03df affected
26afbd826ee326e63a334c37fd45e82e50a615ec< 0acd4eeb4b225b9bebbf9ef96cc10cdd79b94899 affected
6.0 affected
… +8 more rows
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I. Basic Information for CVE-2026-80763

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_event: validate LE Set CIG Parameters response
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate LE Set CIG Parameters response The Command Complete dispatch validates only the fixed part of the LE Set CIG Parameters response. After that part is pulled from the skb, hci_cc_le_set_cig_params() trusts num_handles and reads each entry in the trailing handle array. Matching num_handles against the command's num_cis does not guarantee that the response contains the advertised handles. A truncated response from a malfunctioning controller can therefore make the handler read beyond the skb data. Validate that the remaining skb data contains all advertised handles. Include this in the existing response validation so malformed responses also follow the established CIG failure handling.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于Bluetooth hci_event对LE Set CIG Parameters响应的验证不充分，仅验证固定部分后信任num_handles并读取尾部句柄数组，未确认剩余skb数据是否包含所有句柄，可能导致截断响应引发越界读取。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 26afbd826ee326e63a334c37fd45e82e50a615ec ~ 9e05783d0bb96a7b853cc058a7c7de2dc4a62154 -
Linux Linux 6.0 -

II. Public POCs for CVE-2026-80763

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III. Intelligence Information for CVE-2026-80763

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Patches & Fixes for CVE-2026-80763 (5)

Vendor Advisories for CVE-2026-80763 (1)

Other References for CVE-2026-80763 (1)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80763

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