CVE-2025-68305

Use-after-free via Bluetooth socket bind-write race

Published Dec 16, 2025 · Updated Dec 16, 2025

Use-after-free in the Linux kernel Bluetooth HCI socket layer allows local users to trigger unsafe memory access via concurrent bind and write calls. hci_sock_bind can free a management command through mgmt_pending while hci_sock_sendmsg still uses that command because the paths lacked shared locking. The trigger requires concurrent local HCI management-socket operations; published evidence demonstrates a KASAN slab use-after-free but no further consequence.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel Bluetooth HCI socket layer allows local users to trigger unsafe memory access via concurrent bind and write calls. hci_sock_bind can free a management command through mgmt_pending while hci_sock_sendmsg still uses that command because the paths lacked shared locking. The trigger requires concurrent local HCI management-socket operations; published evidence demonstrates a KASAN slab use-after-free but no further consequence.

The record

CVE
CVE-2025-68305
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4e83f2dbb2bf677e614109df24426c4dded472d4 <e90c05fc5bbea956450a05cc3b36b8fa29cf195e
  2. Affected versionversion=6.16
  3. Affected versionversion=6fe26f694c824b8a4dbf50c635bee1302e3f099c <69fcb0344bc0dd5b13d7e4e98f8b6bf25a6d4ff7
  4. Affected versionversion=6fe26f694c824b8a4dbf50c635bee1302e3f099c <89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392
  5. Affected versionversion=bdd56875c6926d8009914f427df71797693e90d4 <fe68510fc99bb4b88c9c611f83699749002d515a
  6. Affected versionversion=d7882db79135c829a922daf3571f33ea1e056ae3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4e83f2dbb2bf677e614109df24426c4dded472d4 <e90c05fc5bbea956450a05cc3b36b8fa29cf195e; version=6.16; version=6fe26f694c824b8a4dbf50c635bee1302e3f099c <69fcb0344bc0dd5b13d7e4e98f8b6bf25a6d4ff7; version=6fe26f694c824b8a4dbf50c635bee1302e3f099c <89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392; version=bdd56875c6926d8009914f427df71797693e90d4 <fe68510fc99bb4b88c9c611f83699749002d515a; version=d7882db79135c829a922daf3571f33ea1e056ae3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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