CVE-2026-64127

Kernel-address disclosure via stack-pointer PDU copy

Published Jul 19, 2026 · Updated Jul 19, 2026

Information disclosure in Linux Kernel allows local users to obtain a kernel stack address through a paired Bluetooth L2CAP peer. The l2cap_ecred_reconfigure() path passes sizeof(pdu) and &pdu after pdu became a pointer, so skb_put_data() copies pointer storage into the request body instead of the six-byte payload. A local user must trigger reconfiguration on a connected extended-flow-control socket and control the paired peer; the malformed request also breaks reconfiguration.

CVSS severity5.5
Medium
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

Information disclosure in Linux Kernel allows local users to obtain a kernel stack address through a paired Bluetooth L2CAP peer. The l2cap_ecred_reconfigure() path passes sizeof(pdu) and &pdu after pdu became a pointer, so skb_put_data() copies pointer storage into the request body instead of the six-byte payload. A local user must trigger reconfiguration on a connected extended-flow-control socket and control the paired peer; the malformed request also breaks reconfiguration.

The record

CVE
CVE-2026-64127
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=1c08108f3014881ad5f4c35a2abaf9c65475035d <051922ab709c0a6917eae765c22481dfc68379e5
  2. Affected versionversion=1c08108f3014881ad5f4c35a2abaf9c65475035d <3374ef8cf99368a40f7efd51a2a375a4c5dc6f0d
  3. Affected versionversion=1c08108f3014881ad5f4c35a2abaf9c65475035d <356c9d1a1cbacd2a1640fff3c050e1c3472e924f
  4. Affected versionversion=1c08108f3014881ad5f4c35a2abaf9c65475035d <ed5fcd2a26f0c16fc289c8cd6b03328a0582a687
  5. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1c08108f3014881ad5f4c35a2abaf9c65475035d <051922ab709c0a6917eae765c22481dfc68379e5; version=1c08108f3014881ad5f4c35a2abaf9c65475035d <3374ef8cf99368a40f7efd51a2a375a4c5dc6f0d; version=1c08108f3014881ad5f4c35a2abaf9c65475035d <356c9d1a1cbacd2a1640fff3c050e1c3472e924f; version=1c08108f3014881ad5f4c35a2abaf9c65475035d <ed5fcd2a26f0c16fc289c8cd6b03328a0582a687; version=6.10

Published CVSS scores

5.5NIST NVDCVSS: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.

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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
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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