CVE-2026-90253Hinoki check available

Memory leakage via missing cancellation cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Memory leakage in Linux 6.1 Bluetooth MGMT allows local users to retain kernel allocations via canceled mesh-send commands. In net/bluetooth/mgmt.c, mesh_send_cancel() queues a command without a destroy callback, so controller unregistration cancels it without freeing the allocation or releasing its socket reference. Access requires CAP_NET_ADMIN, enabled experimental mesh support, and enabled Bluetooth LE; the documented consequence is retained memory and an unreleased management socket, not a demonstrated crash.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Memory leakage in Linux 6.1 Bluetooth MGMT allows local users to retain kernel allocations via canceled mesh-send commands. In net/bluetooth/mgmt.c, mesh_send_cancel() queues a command without a destroy callback, so controller unregistration cancels it without freeing the allocation or releasing its socket reference. Access requires CAP_NET_ADMIN, enabled experimental mesh support, and enabled Bluetooth LE; the documented consequence is retained memory and an unreleased management socket, not a demonstrated crash.

The record

CVE
CVE-2026-90253
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=6.1
  2. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <05438d338a875a9daa08ca3f6a35b4480cf13de4
  3. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <3c742feda8fcabf741a17bcf668b63c8f606f9c5
  4. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <416fabca9b7237b76aa9cafcf8c497b8ac00d88c
  5. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <88e30d036d777b00aed42bd35000de23ff40910c
  6. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <b609341ee56967d9a45845ff26f79336d2114b55
  7. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <fa46d428c014e7b72a18634679815670418e67dc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <05438d338a875a9daa08ca3f6a35b4480cf13de4; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <3c742feda8fcabf741a17bcf668b63c8f606f9c5; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <416fabca9b7237b76aa9cafcf8c497b8ac00d88c; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <88e30d036d777b00aed42bd35000de23ff40910c; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <b609341ee56967d9a45845ff26f79336d2114b55; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <fa46d428c014e7b72a18634679815670418e67dc

Published CVSS scores

3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
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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