In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern()

In the parse_adv_monitor_pattern() function, the value of
the 'length' variable is currently limited to HCI_MAX_EXT_AD_LENGTH(251).
The size of the 'value' array in the mgmt_adv_pattern structure is 31.
If the value of 'pattern[i].length' is set in the user space
and exceeds 31, the 'patterns[i].value' array can be accessed
out of bound when copied.

Increasing the size of the 'value' array in
the 'mgmt_adv_pattern' structure will break the userspace.
Considering this, and to avoid OOB access revert the limits for 'offset'
and 'length' back to the value of HCI_MAX_AD_LENGTH.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00024.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux Subscribe
Linux Kernel Subscribe

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/3a50d59b3781bc3a4e96533612509546a4c309a7 cve-icon cve-icon
https://git.kernel.org/stable/c/4b7d4aa5399b5a64caee639275615c63c008540d cve-icon cve-icon
https://git.kernel.org/stable/c/5f7350ff2b179764a4f40ba4161b60b8aaef857b cve-icon cve-icon
https://git.kernel.org/stable/c/8d59fba49362c65332395789fd82771f1028d87e cve-icon cve-icon
https://git.kernel.org/stable/c/96616530f524a0a76248cd44201de0a9e8526190 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025120818-CVE-2025-40294-b8e3@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40294 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40294 cve-icon
History

Tue, 09 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important

Mon, 08 Dec 2025 01:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern() In the parse_adv_monitor_pattern() function, the value of the 'length' variable is currently limited to HCI_MAX_EXT_AD_LENGTH(251). The size of the 'value' array in the mgmt_adv_pattern structure is 31. If the value of 'pattern[i].length' is set in the user space and exceeds 31, the 'patterns[i].value' array can be accessed out of bound when copied. Increasing the size of the 'value' array in the 'mgmt_adv_pattern' structure will break the userspace. Considering this, and to avoid OOB access revert the limits for 'offset' and 'length' back to the value of HCI_MAX_AD_LENGTH. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.
Title Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-08T00:46:17.899Z

Reserved: 2025-04-16T07:20:57.185Z

Link: CVE-2025-40294

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-08T01:16:01.423

Modified: 2025-12-08T18:26:49.133

Link: CVE-2025-40294

cve-icon Redhat

Severity : Important

Publid Date: 2025-12-08T00:00:00Z

Links: CVE-2025-40294 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.