CVE-2021-47357

atm: iphase: fix possible use-after-free in ia_module_exit()

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:

atm: iphase: fix possible use-after-free in ia_module_exit()

This module's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.

Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: iphase: corrige posible use after free en ia_module_exit(). La ruta de eliminación de este módulo llama a del_timer(). Sin embargo, esa función no espera hasta que finalice el controlador del temporizador. Esto significa que es posible que el controlador del temporizador aún esté ejecutándose después de que haya finalizado la función de eliminación del controlador, lo que daría como resultado un use after free. Para solucionarlo, llame a del_timer_sync(), lo que garantiza que el controlador del temporizador haya finalizado y no pueda reprogramarse.

*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

2024-05-21 CVE Reserved
2024-05-21 CVE Published
2024-05-22 EPSS Updated
2024-11-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (9)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479	2021-07-20
https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42	2021-07-20
https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29	2021-07-20
https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417	2021-07-20
https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b	2021-07-19
https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b	2021-07-19
https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8	2021-07-19
https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297	2021-07-19
https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f	2021-05-11

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"				< 4.4.276 Search vendor "Linux" for product "Linux Kernel" and version " < 4.4.276"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.9.276 Search vendor "Linux" for product "Linux Kernel" and version " < 4.9.276"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.14.240 Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.240"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.198 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.198"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.133 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.133"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.51 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.51"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.12.18 Search vendor "Linux" for product "Linux Kernel" and version " < 5.12.18"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.13.3 Search vendor "Linux" for product "Linux Kernel" and version " < 5.13.3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.14 Search vendor "Linux" for product "Linux Kernel" and version " < 5.14"		en		Affected