CVE-2026-72333

Bluetooth channel stall via signaling identifier exhaustion

Published Aug 15, 2026 · Updated Aug 15, 2026

Denial of service in affected Linux kernel versions allows physically proximate attackers to permanently stall a Bluetooth LE CoC channel. L2CAP allocates identifiers for response-free LE credit commands but never releases them, exhausts IDs 1–255, and then transmits invalid identifier 0. Reaching the flaw requires an established Bluetooth LE credit-based channel and sustained inbound data; the consequence is limited to that channel.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in affected Linux kernel versions allows physically proximate attackers to permanently stall a Bluetooth LE CoC channel. L2CAP allocates identifiers for response-free LE credit commands but never releases them, exhausts IDs 1–255, and then transmits invalid identifier 0. Reaching the flaw requires an established Bluetooth LE credit-based channel and sustained inbound data; the consequence is limited to that channel.

The record

CVE
CVE-2026-72333
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.10.261 <5.11
  2. Affected versionversion=5.15.212 <5.16
  3. Affected versionversion=6.18.21 <6.18.40
  4. Affected versionversion=6.19.11 <6.20
  5. Affected versionversion=6c3ea155e5ee3e56606233acde8309afda66d483 <6e1930ece855a4c256f1c7e6632d634cfb9888b5
  6. Affected versionversion=6c3ea155e5ee3e56606233acde8309afda66d483 <d0a2b0c81f112540a337cde1c20251bf05ddf1da
  7. Affected versionversion=7.0
  8. Affected versionversion=84bc3197f7d87c5b89c156e853d0561a9154eceb
  9. Affected versionversion=8c1cdbc1bacc0cf9c27c3ebda11a81c3dcd01630
  10. Affected versionversion=9b24ad4787cad46a3917620799f8455c6533b8df <bd1e01170341291292fd4c46b5f6949da282ca6c
  11. Affected versionversion=e86554c37d3d2b4b24608e0313f882cae28b8adb <b8a32a5fc915b024c60f18d51b6cffd2bd64d4a6
  12. Affected versionversion=ea6cf86167b3972caa68972d2a1ad43ecbbb8331 <0c602cb8f148a36bfb39c25ade400bdadc023c4f
  13. Affected versionversion=ed97bb2cf96684ee646be6f37e4c4835f9d30caa

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.10.261 <5.11; version=5.15.212 <5.16; version=6.18.21 <6.18.40; version=6.19.11 <6.20; version=6c3ea155e5ee3e56606233acde8309afda66d483 <6e1930ece855a4c256f1c7e6632d634cfb9888b5; version=6c3ea155e5ee3e56606233acde8309afda66d483 <d0a2b0c81f112540a337cde1c20251bf05ddf1da; version=7.0; version=84bc3197f7d87c5b89c156e853d0561a9154eceb; version=8c1cdbc1bacc0cf9c27c3ebda11a81c3dcd01630; version=9b24ad4787cad46a3917620799f8455c6533b8df <bd1e01170341291292fd4c46b5f6949da282ca6c; version=e86554c37d3d2b4b24608e0313f882cae28b8adb <b8a32a5fc915b024c60f18d51b6cffd2bd64d4a6; version=ea6cf86167b3972caa68972d2a1ad43ecbbb8331 <0c602cb8f148a36bfb39c25ade400bdadc023c4f; version=ed97bb2cf96684ee646be6f37e4c4835f9d30caa

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo