IM
IronMonkey Threat Research

CVE-2024-48881 MEDIUM

Published: 2025-01-11 | Last Modified: 2025-11-03 | Status: Modified

Description

In the Linux kernel, the following vulnerability has been resolved: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721. This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.

Additional Descriptions (1)

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bcache: revertir el reemplazo de IS_ERR_OR_NULL con IS_ERR nuevamente. El commit 028ddcac477b ("bcache: eliminar la comprobación innecesaria del punto NULL en las asignaciones de nodos") conduce a una deferencia de puntero NULL en cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >Del código anterior en cache_set_flush(), si el código de registro anterior falla antes de asignar c->root, es posible que c->root sea NULL como lo que se inicializa. __bch_btree_node_alloc() nunca devuelve NULL, pero es posible que c->root sea NULL en la línea 1721 anterior. Este parche reemplaza IS_ERR() por IS_ERR_OR_NULL() para solucionar esto.

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 CWE-476
134c704f-9b21-4f2e-91b3-4a467353bcc0 Secondary
en CWE-476

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7fd36a001480> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd38557d2c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36b12e000> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36b186a80> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36a002b40> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36a001f40> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd2d8113100> Operating System
linux linux_kernel 6.13 <built-in method update of dict object at 0x7fd3849cce40> 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:6.13:rc1:*:*:*:*:*:*

References