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CVE-2026-80692— Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks

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.

在 Linux 内核中，以下漏洞已得到修复： Bluetooth: hci_sync：在 hci_connect_acl/le_sync() 回调中持有 conn 如果在 hci_sync 任务运行期间 conn 被释放，理论上存在使用已释放内存（Use-After-Free, UAF）的风险。 通过持有引用计数来避免该问题。

CVSS 8.8 · High EPSS 0.15% · P5

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 881559af5f5c545f6828e7c74d79813eb886d523< 9a77f296aff4b2ca5f2928ab3a3220c82d8b4074 affected
881559af5f5c545f6828e7c74d79813eb886d523< 2f5d635ad5906b0235bc0c870e8beba3116e1e98 affected
d948e1ffa1d40240d5c81af6dcbcb87b39cb8d3c affected
5dd0bd277a0a936708a33ecc447dce77a08cbde6 affected
6.6.51< 6.7 affected
6.8.9< 6.9 affected
6.9 affected
< 6.9 unaffected
… +2 more rows
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I. Basic Information for CVE-2026-80692

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 881559af5f5c545f6828e7c74d79813eb886d523 ~ 9a77f296aff4b2ca5f2928ab3a3220c82d8b4074 -
Linux Linux 6.9 -

II. Public POCs for CVE-2026-80692

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III. Intelligence Information for CVE-2026-80692

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Patches & Fixes for CVE-2026-80692 (2)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80672 8.8 HIGH ntfs: fix u16 truncation of restart-area length check
CVE-2026-80633 8.8 HIGH iommufd: Take dma_resv lock before dma_buf_unpin() in release path
CVE-2026-80683 8.8 HIGH Bluetooth: SCO: give the socket its own sco_conn reference

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80692

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