CVE-2023-52518

Bluetooth: hci_codec: Fix leaking content of local_codecs

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

NVD
RedHat

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

Bluetooth: hci_codec: Fix leaking content of local_codecs

The following memory leak can be observed when the controller supports
codecs which are stored in local_codecs list but the elements are never
freed:

unreferenced object 0xffff88800221d840 (size 32):
comm "kworker/u3:0", pid 36, jiffies 4294898739 (age 127.060s)
hex dump (first 32 bytes):
f8 d3 02 03 80 88 ff ff 80 d8 21 02 80 88 ff ff ..........!.....
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffffb324f557>] __kmalloc+0x47/0x120
[<ffffffffb39ef37d>] hci_codec_list_add.isra.0+0x2d/0x160
[<ffffffffb39ef643>] hci_read_codec_capabilities+0x183/0x270
[<ffffffffb39ef9ab>] hci_read_supported_codecs+0x1bb/0x2d0
[<ffffffffb39f162e>] hci_read_local_codecs_sync+0x3e/0x60
[<ffffffffb39ff1b3>] hci_dev_open_sync+0x943/0x11e0
[<ffffffffb396d55d>] hci_power_on+0x10d/0x3f0
[<ffffffffb30c99b4>] process_one_work+0x404/0x800
[<ffffffffb30ca134>] worker_thread+0x374/0x670
[<ffffffffb30d9108>] kthread+0x188/0x1c0
[<ffffffffb304db6b>] ret_from_fork+0x2b/0x50
[<ffffffffb300206a>] ret_from_fork_asm+0x1a/0x30

A memory leak flaw was found in the Linux kernel’s Bluetooth functionality. This flaw allows a local user to crash the system.

*Credits: N/A

CVSS Scores

Red Hatv3.1 5.5

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-20 CVE Reserved
2024-03-02 CVE Published
2024-03-03 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak')

CAPEC

References (6)

URL	Tag	Source
https://git.kernel.org/stable/c/8961987f3f5fa2f2618e72304d013c8dd5e604a6	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/626535077ba9dc110787540d1fe24881094c15a1	2023-10-10
https://git.kernel.org/stable/c/eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1	2023-10-10
https://git.kernel.org/stable/c/b938790e70540bf4f2e653dcd74b232494d06c8f	2023-09-20

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-52518	2024-07-24
https://bugzilla.redhat.com/show_bug.cgi?id=2267799	2024-07-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.16 < 6.1.57 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.1.57"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.16 < 6.5.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.5.7"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.16 < 6.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.6"		en		Affected