CVE-2024-56534

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-56534
In the Linux kernel, the following vulnerability has been resolved: isofs: avoid memory leak in iocharset A memleak was found as below: unreferenced object 0xffff0000d10164d8 (size 8): comm "pool-udisksd", pid 108217, jiffies 4295408555 hex dump (first 8 bytes): 75 74 66 38 00 cc cc cc utf8.... backtrace (crc de430d31): [<ffff800081046e6c>] kmemleak_alloc+0xb8/0xc8 [<ffff8000803e6c3c>] __kmalloc_node_track_caller_noprof+0x380/0x474 [<ffff800080363b74>] kstrdup+0x70/0xfc [<ffff80007bb3c6a4>] isofs_parse_param+0x228/0x2c0 [isofs] [<ffff8000804d7f68>] vfs_parse_fs_param+0xf4/0x164 [<ffff8000804d8064>] vfs_parse_fs_string+0x8c/0xd4 [<ffff8000804d815c>] vfs_parse_monolithic_sep+0xb0/0xfc [<ffff8000804d81d8>] generic_parse_monolithic+0x30/0x3c [<ffff8000804d8bfc>] parse_monolithic_mount_data+0x40/0x4c [<ffff8000804b6a64>] path_mount+0x6c4/0x9ec [<ffff8000804b6e38>] do_mount+0xac/0xc4 [<ffff8000804b7494>] __arm64_sys_mount+0x16c/0x2b0 [<ffff80008002b8dc>] invoke_syscall+0x7c/0x104 [<ffff80008002ba44>] el0_svc_common.constprop.1+0xe0/0x104 [<ffff80008002ba94>] do_el0_svc+0x2c/0x38 [<ffff800081041108>] el0_svc+0x3c/0x1b8 The opt->iocharset is freed inside the isofs_fill_super function, But there may be situations where it's not possible to enter this function. For example, in the get_tree_bdev_flags function,when encountering the situation where "Can't mount, would change RO state," In such a case, isofs_fill_super will not have the opportunity to be called,which means that opt->iocharset will not have the chance to be freed,ultimately leading to a memory leak. Let's move the memory freeing of opt->iocharset into isofs_free_fc function.

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/0b5bbeee4de616a268db77e2f40f19ab010a367b Patch
https://git.kernel.org/stable/c/0fbab266ca8000333c966f5b58cb9b9cac658573 Patch
https://git.kernel.org/stable/c/34f090ddb3630a26e5a6b220bf3bfaf5c7b70393 Patch
Configurations

Configuration 1 (hide)

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

14 Jan 2025, 15:49

Type Values Removed Values Added
CWE CWE-401
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: isofs: evitar pérdida de memoria en iocharset Se encontró una pérdida de memoria como la siguiente: objeto sin referencia 0xffff0000d10164d8 (tamaño 8): comm "pool-udisksd", pid 108217, jiffies 4295408555 volcado hexadecimal (primeros 8 bytes): 75 74 66 38 00 cc cc cc utf8.... backtrace (crc de430d31): [] kmemleak_alloc+0xb8/0xc8 [] __kmalloc_node_track_caller_noprof+0x380/0x474 [] kstrdup+0x70/0xfc [] parámetro_parse_isofs+0x228/0x2c0 [isofs] [] parámetro_fs_parse_vfs+0xf4/0x164 [] cadena_fs_parse_vfs+0x8c/0xd4 [] sep_monolítico_vfs+0xb0/0xfc [] parámetro_monolítico_genérico+0x30/0x3c [] analizar_datos_de_montaje_monolítico+0x40/0x4c [] ruta_de_montaje+0x6c4/0x9ec [] hacer_montaje+0xac/0xc4 [] __arm64_montaje_del_sistema+0x16c/0x2b0 [] invocar_llamada_del_sistema+0x7c/0x104 [] el0_svc_common.constprop.1+0xe0/0x104 [] do_el0_svc+0x2c/0x38 [] el0_svc+0x3c/0x1b8 El opt-&gt;iocharset se libera dentro de la función isofs_fill_super, pero puede haber situaciones en las que no sea posible ingresar a esta función. Por ejemplo, en la función get_tree_bdev_flags, cuando se encuentra la situación en la que "No se puede montar, cambiaría el estado de RO", en tal caso, isofs_fill_super no tendrá la oportunidad de ser llamado, lo que significa que opt-&gt;iocharset no tendrá la oportunidad de ser liberado, lo que finalmente conduce a una pérdida de memoria. Pasemos la liberación de memoria de opt-&gt;iocharset a la función isofs_free_fc.
References () https://git.kernel.org/stable/c/0b5bbeee4de616a268db77e2f40f19ab010a367b - () https://git.kernel.org/stable/c/0b5bbeee4de616a268db77e2f40f19ab010a367b - Patch
References () https://git.kernel.org/stable/c/0fbab266ca8000333c966f5b58cb9b9cac658573 - () https://git.kernel.org/stable/c/0fbab266ca8000333c966f5b58cb9b9cac658573 - Patch
References () https://git.kernel.org/stable/c/34f090ddb3630a26e5a6b220bf3bfaf5c7b70393 - () https://git.kernel.org/stable/c/34f090ddb3630a26e5a6b220bf3bfaf5c7b70393 - Patch

27 Dec 2024, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-12-27 14:15

Updated : 2025-01-14 15:49

NVD link : CVE-2024-56534

Mitre link : CVE-2024-56534

CVE.ORG link : CVE-2024-56534

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime