CVE-2026-68391

Kernel memory corruption via unreferenced connection pointers

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in the Linux kernel's Bluetooth management code allows local users to disclose or corrupt kernel memory. Management callbacks retain hci_conn pointers beyond RCU protection without incrementing their reference counts, while unlocked lookups race with connection teardown. Exploitation requires a trusted HCI management socket with CAP_NET_ADMIN and attacker-controlled command and teardown timing; successful triggering also crashes or panics the kernel.

CVSS severity7.8
High
EPSS probability0.13%
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's Bluetooth management code allows local users to disclose or corrupt kernel memory. Management callbacks retain hci_conn pointers beyond RCU protection without incrementing their reference counts, while unlocked lookups race with connection teardown. Exploitation requires a trusted HCI management socket with CAP_NET_ADMIN and attacker-controlled command and teardown timing; successful triggering also crashes or panics the kernel.

The record

CVE
CVE-2026-68391
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-911, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.0
  2. Affected versionversion=7b445e220db9a2c58be5d09bbbd322abf1b1452a <b56f2ecafc08f372bf0529f9c4f3f429cb1702dc
  3. Affected versionversion=7b445e220db9a2c58be5d09bbbd322abf1b1452a <d5b3b484b62bb0f4542e7622789d28871626cdf0
  4. Affected versionversion=7b445e220db9a2c58be5d09bbbd322abf1b1452a <da55f570191d5d72f10c607a7043b947eb05ea46
  5. Affected versionversion=7b445e220db9a2c58be5d09bbbd322abf1b1452a <ecdcb55ea1c01dda074406f38058785a69526734
  6. Affected versionversion=7b445e220db9a2c58be5d09bbbd322abf1b1452a <f915e74b6f18293d1d69a2a3305ef321ff7c0172

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=7b445e220db9a2c58be5d09bbbd322abf1b1452a <b56f2ecafc08f372bf0529f9c4f3f429cb1702dc; version=7b445e220db9a2c58be5d09bbbd322abf1b1452a <d5b3b484b62bb0f4542e7622789d28871626cdf0; version=7b445e220db9a2c58be5d09bbbd322abf1b1452a <da55f570191d5d72f10c607a7043b947eb05ea46; version=7b445e220db9a2c58be5d09bbbd322abf1b1452a <ecdcb55ea1c01dda074406f38058785a69526734; version=7b445e220db9a2c58be5d09bbbd322abf1b1452a <f915e74b6f18293d1d69a2a3305ef321ff7c0172

Published CVSS scores

7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H
7.0Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-911Improper Update of Reference Count
T1068Exploitation for Privilege Escalation

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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