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:
[] __kmalloc+0x47/0x120
[] hci_codec_list_add.isra.0+0x2d/0x160
[] hci_read_codec_capabilities+0x183/0x270
[] hci_read_supported_codecs+0x1bb/0x2d0
[] hci_read_local_codecs_sync+0x3e/0x60
[] hci_dev_open_sync+0x943/0x11e0
[] hci_power_on+0x10d/0x3f0
[] process_one_work+0x404/0x800
[] worker_thread+0x374/0x670
[] kthread+0x188/0x1c0
[] ret_from_fork+0x2b/0x50
[] ret_from_fork_asm+0x1a/0x30

Classification

CVE ID: CVE-2023-52518

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.81% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/626535077ba9dc110787540d1fe24881094c15a1
https://git.kernel.org/stable/c/eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1
https://git.kernel.org/stable/c/b938790e70540bf4f2e653dcd74b232494d06c8f

Timeline