CVE-2021-47113

btrfs: abort in rename_exchange if we fail to insert the second ref

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:

btrfs: abort in rename_exchange if we fail to insert the second ref

Error injection stress uncovered a problem where we'd leave a dangling
inode ref if we failed during a rename_exchange. This happens because
we insert the inode ref for one side of the rename, and then for the
other side. If this second inode ref insert fails we'll leave the first
one dangling and leave a corrupt file system behind. Fix this by
aborting if we did the insert for the first inode ref.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: btrfs: abortar en rename_exchange si no logramos insertar la segunda referencia. El error de inyección de estrés descubrió un problema en el que dejaríamos una referencia de inodo colgante si fallábamos durante un rename_exchange. Esto sucede porque insertamos la referencia del inodo para un lado del cambio de nombre y luego para el otro lado. Si esta segunda inserción de referencia de inodo falla, dejaremos el primero colgando y dejaremos un sistema de archivos corrupto. Solucione este problema abortando si hicimos la inserción para la primera referencia de inodo.

*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

2024-03-04 CVE Reserved
2024-03-15 CVE Published
2024-03-16 EPSS Updated
2024-11-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/0df50d47d17401f9f140dfbe752a65e5d72f9932	2021-06-10
https://git.kernel.org/stable/c/ff8de2cec65a8c8521faade12a31b39c80e49f5b	2021-06-10
https://git.kernel.org/stable/c/dc09ef3562726cd520c8338c1640872a60187af5	2021-05-27

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"				< 5.10.43 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.43"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.12.10 Search vendor "Linux" for product "Linux Kernel" and version " < 5.12.10"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.13 Search vendor "Linux" for product "Linux Kernel" and version " < 5.13"		en		Affected