CVE-2024-48881

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-48881
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2 Patch
https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0 Patch
https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715 Patch
https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1 Patch
https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0 Patch
https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667 Patch
https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
History

31 Jan 2025, 15:54

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
Summary
  • (es) 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 v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2 - () https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2 - Patch
References () https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0 - () https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0 - Patch
References () https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715 - () https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715 - Patch
References () https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1 - () https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1 - Patch
References () https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0 - () https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0 - Patch
References () https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667 - () https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667 - Patch
References () https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464 - () https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464 - Patch
CWE CWE-476

11 Jan 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-01-11 13:15

Updated : 2025-10-01 20:17

NVD link : CVE-2024-48881

Mitre link : CVE-2024-48881

CVE.ORG link : CVE-2024-48881

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference