CVE-2024-26749

usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()

Severity Score

"-"

*CVSS v-

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:

usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()

...
cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request);
list_del_init(&priv_req->list);
...

'priv_req' actually free at cdns3_gadget_ep_free_request(). But
list_del_init() use priv_req->list after it.

[ 1542.642868][ T534] BUG: KFENCE: use-after-free read in __list_del_entry_valid+0x10/0xd4
[ 1542.642868][ T534]
[ 1542.653162][ T534] Use-after-free read at 0x000000009ed0ba99 (in kfence-#3):
[ 1542.660311][ T534] __list_del_entry_valid+0x10/0xd4
[ 1542.665375][ T534] cdns3_gadget_ep_disable+0x1f8/0x388 [cdns3]
[ 1542.671571][ T534] usb_ep_disable+0x44/0xe4
[ 1542.675948][ T534] ffs_func_eps_disable+0x64/0xc8
[ 1542.680839][ T534] ffs_func_set_alt+0x74/0x368
[ 1542.685478][ T534] ffs_func_disable+0x18/0x28

Move list_del_init() before cdns3_gadget_ep_free_request() to resolve this
problem.

En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: usb: cdns3: uso de memoria fijo después de liberar en cdns3_gadget_ep_disable() ... cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request); list_del_init(&priv_req->lista); ... 'priv_req' en realidad es gratuito en cdns3_gadget_ep_free_request(). Pero list_del_init() usa priv_req->list después. [ 1542.642868][ T534] ERROR: KFENCE: lectura de uso después de liberación en __list_del_entry_valid+0x10/0xd4 [ 1542.642868][ T534] [ 1542.653162][ T534] Lectura de uso después de liberación en 0x000000009ed0ba99 (en kfence-#3 ): [ 1542.660311][ T534] __list_del_entry_valid+0x10/0xd4 [ 1542.665375][ T534] cdns3_gadget_ep_disable+0x1f8/0x388 [cdns3] [ 1542.671571][ T534] usb_ep_disable+0x44/0x e4 [ 1542.675948][ T534] ffs_func_eps_disable+0x64/0xc8 [ 1542.680839] [ T534] ffs_func_set_alt+0x74/0x368 [ 1542.685478][ T534] ffs_func_disable+0x18/0x28 Mueva list_del_init() antes de cdns3_gadget_ep_free_request() para resolver este problema.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-04-03 CVE Published
2024-04-04 EPSS Updated
2024-09-11 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (9)

URL	Tag	Source
https://git.kernel.org/stable/c/7733f6c32e36ff9d7adadf40001039bf219b1cbe	Vuln. Introduced
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/cfa9abb5570c489dabf6f7fb3a066cc576fc8824	2024-03-01
https://git.kernel.org/stable/c/b40328eea93c75a5645891408010141a0159f643	2024-03-01
https://git.kernel.org/stable/c/4e5c73b15d95452c1ba9c771dd013a3fbe052ff3	2024-03-01
https://git.kernel.org/stable/c/2134e9906e17b1e5284300fab547869ebacfd7d9	2024-03-01
https://git.kernel.org/stable/c/29e42e1578a10c611b3f1a38f3229b2d664b5d16	2024-03-01
https://git.kernel.org/stable/c/9a07244f614bc417de527b799da779dcae780b5d	2024-03-01
https://git.kernel.org/stable/c/cd45f99034b0c8c9cb346dd0d6407a95ca3d36f6	2024-02-19

URL	Date	SRC

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"				>= 5.4 < 5.4.270 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.4.270"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 5.10.211 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.10.211"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 5.15.150 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.15.150"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 6.1.80 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 6.1.80"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 6.6.19 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 6.6.19"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 6.7.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 6.7.7"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 6.8"		en		Affected