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

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.

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

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* 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
2024-12-19 CVE Updated
2025-03-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak')
CWE-770: Allocation of Resources Without Limits or Throttling

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