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Review reviewHigh

CVE-2026-64126

Linux

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate Add Extended Advertising Data length MGMT_OP_ADD_EXT_ADV_DATA is registered as a variable-length command, with MGMT_ADD_EXT_ADV_DATA_SIZE as the fixed header size. The handler then uses cp->adv_data_len and cp->scan_rsp_len to validate and copy cp->data, but it never checks that those bytes are part of the mgmt command payload. A short command can therefore make add_ext_adv_data() pass an out-of-bounds pointer into tlv_data_is_valid(). If the bytes beyond the command buffer are addressable, they ca...

CVSS
7.3
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.20
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.3

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate Add Extended Advertising Data length MGMT_OP_ADD_EXT_ADV_DATA is registered as a variable-length command, with MGMT_ADD_EXT_ADV_DATA_SIZE as the fixed header size. The handler then uses cp->adv_data_len and cp->scan_rsp_len to validate and copy cp->data, but it never checks that those bytes are part of the mgmt command payload. A short command can therefore make add_ext_adv_data() pass an out-of-bounds pointer into tlv_data_is_valid(). If the bytes beyond the command buffer are addressable, they ca...

Affected product and versions

Product
Linux
Affected versions
>= 12410572833a283ce92fcf9679ca8a2f372097ee < 0d5104390b445e7bd664ad583837e4c04d892c9d, >= 12410572833a283ce92fcf9679ca8a2f372097ee < 14b01b9cba04e6ce82825f68fc4c4322fa4ffa43, >= 12410572833a283ce92fcf9679ca8a2f372097ee < a143ce77a5292f2c9285137433d879ce71d190a7, >= 12410572833a283ce92fcf9679ca8a2f372097ee < a6c75a3fad226ccbd8ef9110dee87c92c299f2ab, >= 12410572833a283ce92fcf9679ca8a2f372097ee < f1febe93ef075314615f970a87681d9ab86691d1, >= 12410572833a283ce92fcf9679ca8a2f372097ee < 0bc1a5a69f541859293d79db72bd7854ac48df51, >= 12410572833a283ce92fcf9679ca8a2f372097ee < d3f7d17960ed50df3a6709c5158caff989c8c905, >= 5.11
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CWE
Not available