CVE-2021-47358

staging: greybus: uart: fix tty use after free

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:

staging: greybus: uart: fix tty use after free

User space can hold a tty open indefinitely and tty drivers must not
release the underlying structures until the last user is gone.

Switch to using the tty-port reference counter to manage the life time
of the greybus tty state to avoid use after free after a disconnect.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: staging: greybus: uart: corrige el use after free de tty. El espacio de usuario puede mantener un tty abierto indefinidamente y los controladores de tty no deben liberar las estructuras subyacentes hasta que el último usuario se haya ido. Cambie al uso del contador de referencia del puerto tty para administrar la vida útil del estado tty de greybus para evitar su uso después de una desconexión.

*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
2024-12-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (8)

URL	Tag	Source
https://git.kernel.org/stable/c/a18e15175708d39abbe9746ddc3479466b7800c3	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d	2021-10-06
https://git.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33f	2021-10-06
https://git.kernel.org/stable/c/a5cfd51f6348e8fd7531461366946039c29c7e69	2021-10-06
https://git.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14	2021-09-30
https://git.kernel.org/stable/c/b9e697e60ce9890e9258a73eb061288e7d68e5e6	2021-09-30
https://git.kernel.org/stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1	2021-09-30
https://git.kernel.org/stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44f	2021-09-14

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"				>= 4.9 < 4.9.285 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.9.285"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 4.14.249 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.14.249"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 4.19.209 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.19.209"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 5.4.150 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.4.150"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 5.10.70 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.10.70"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 5.14.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.14.9"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 5.15 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.15"		en		Affected