CVE-2026-68188

Local kernel crash via unlocked RFCOMM session

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in Linux Bluetooth RFCOMM allows local users to crash affected kernels through a TTY termios ioctl race. rfcomm_tty_set_termios reads dlc->session without rfcomm_mutex, allowing krfcommd to unlink and free the session before rfcomm_send_rpn dereferences it. Access to an active RFCOMM TTY and successful race timing are required; triggering can interrupt the system and disclose limited kernel memory.

CVSS severity5.3
Medium
EPSS probability0.21%
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 Linux Bluetooth RFCOMM allows local users to crash affected kernels through a TTY termios ioctl race. rfcomm_tty_set_termios reads dlc->session without rfcomm_mutex, allowing krfcommd to unlink and free the session before rfcomm_send_rpn dereferences it. Access to an active RFCOMM TTY and successful race timing are required; triggering can interrupt the system and disclose limited kernel memory.

The record

CVE
CVE-2026-68188
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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

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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=2.6.14
  2. Affected versionversion=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <2894bd8c68e97accd758ca6e5fc375d7e9e8882c
  3. Affected versionversion=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <780b04d09c941262ee2a2b4a09906451b69df8a6
  4. Affected versionversion=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <98bc68194e37bfa5e8ddc80b5c1eb0be4dc607ea
  5. Affected versionversion=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <a82a9d3891f5607030b0672c255087a12bb9837b
  6. Affected versionversion=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <c783399efc22d035443f1dfbf2a09bf9562aaa5e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.14; version=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <2894bd8c68e97accd758ca6e5fc375d7e9e8882c; version=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <780b04d09c941262ee2a2b4a09906451b69df8a6; version=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <98bc68194e37bfa5e8ddc80b5c1eb0be4dc607ea; version=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <a82a9d3891f5607030b0672c255087a12bb9837b; version=3a5e903c09aed19ca4a1bb26d87b8d6461a93818 <c783399efc22d035443f1dfbf2a09bf9562aaa5e

Published CVSS scores

5.3Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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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