IM
IronMonkey Threat Research

CVE-2024-26993 MEDIUM

Published: 2024-05-01 | Last Modified: 2026-05-12 | Status: Modified

Description

In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.

Additional Descriptions (1)

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs: sysfs: corrige la fuga de referencia en sysfs_break_active_protection() La rutina sysfs_break_active_protection() tiene una fuga de referencia obvia en su ruta de error. Si la llamada a kernfs_find_and_get() falla, entonces kn será NULL, por lo que no se llamará a la rutina complementaria sysfs_unbreak_active_protection() (y solo causaría una infracción de acceso al intentar eliminar la referencia a kn->parent si se llamara). Como resultado, la referencia a kobj adquirida al inicio de la función nunca se publicará. Solucione la fuga agregando una llamada explícita a kobject_put() cuando kn sea NULL.

CVSS Metrics

Base Score: 5.5 (MEDIUM)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.8

Impact Score: 3.6

Weaknesses

Source Type Description
[email protected] Primary
en NVD-CWE-Other

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7fd3703f5fc0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd39c57afc0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd39c57b6c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd39c57ae80> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd3694e4f80> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd39c2a64c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd385664cc0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd2dbf6e340> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd39c579900> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd319eb9180> Operating System
linux linux_kernel 6.9 <built-in method update of dict object at 0x7fd39c5780c0> Operating System
linux linux_kernel 6.9 <built-in method update of dict object at 0x7fd38661c6c0> Operating System
linux linux_kernel 6.9 <built-in method update of dict object at 0x7fd3412f5640> Operating System
linux linux_kernel 6.9 <built-in method update of dict object at 0x7fd3412f7f00> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*

References