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CVE-2023-52518

Bluetooth: hci_codec: Fix leaking content of local_codecs

MEDIUM
5.5
CVSS Score
Published: March 2, 2024 at 09:54 PM UTC
Updated: June 17, 2026 at 06:42 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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

Affected

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

Linux Kernel· Linux
95%
5.16 ≤ v < 6.1.575.16 ≤ v < 6.5.75.16 ≤ v < 6.66.2 ≤ v < 6.5.76.6 rc16.6 rc26.6 rc36.6 rc48961987f3f5fa2f2618e72304d013c8dd5e604a6
Vendor states this is fixed in 626535077ba9dc110787540d1fe24881094c15a1 (fixed)
Vendor states this is fixed in b938790e70540bf4f2e653dcd74b232494d06c8f (fixed)
Vendor states this is fixed in eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1 (fixed)
Vendor states this is fixed in 5.16 (unaffected)
Vendor states this is fixed in 6.1.57 (unaffected)
Vendor states this is fixed in 6.5.7 (unaffected)
Vendor states this is fixed in 6.6 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/626535077ba9dc110787540d1fe24881094c15a1
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b938790e70540bf4f2e653dcd74b232494d06c8f
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

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