CVE-2025-38315

Bluetooth: btintel: Check dsbr size from EFI variable

MEDIUM
5.5
CVSS Score
Published: July 10, 2025 at 07:42 AM UTC
Updated: June 17, 2026 at 09:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel: Check dsbr size from EFI variable Since the size of struct btintel_dsbr is already known, we can just start there instead of querying the EFI variable size. If the final result doesn't match what we expect also fail. This fixes a stack buffer overflow when the EFI variable is larger than struct btintel_dsbr.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.11 ≤ v < 6.12.346.11 ≤ v < 6.15.36.11 ≤ v < 6.166.11.1 ≤ v < 6.12.346.13 ≤ v < 6.15.36.116.11 rc66.11 rc7eb9e749c0182affafadfbe5ded4503c4b5a9b57c
Vendor states this is fixed in 3aa1dc3c9060e335e82e9c182bf3d1db29220b1b (fixed)
Vendor states this is fixed in 7b8526bb489780ccc0caffc446ecabec83cfe568 (fixed)
Vendor states this is fixed in 9427f6081f37c795a8bd29d0ee72a4da3bd64af8 (fixed)
Vendor states this is fixed in 6.11 (unaffected)
Vendor states this is fixed in 6.12.34 (unaffected)
Vendor states this is fixed in 6.15.3 (unaffected)
Vendor states this is fixed in 6.16 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3aa1dc3c9060e335e82e9c182bf3d1db29220b1b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7b8526bb489780ccc0caffc446ecabec83cfe568
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9427f6081f37c795a8bd29d0ee72a4da3bd64af8

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-674

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