CVE-2021-47438

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47438
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path Prior to this patch in case mlx5_core_destroy_cq() failed it returns without completing all destroy operations and that leads to memory leak. Instead, complete the destroy flow before return error. Also move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq() to be symmetrical with mlx5_core_create_cq(). kmemleak complains on: unreferenced object 0xc000000038625100 (size 64): comm "ethtool", pid 28301, jiffies 4298062946 (age 785.380s) hex dump (first 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... backtrace: [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core] [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core] [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core] [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230 [mlx5_core] [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core] [<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0 [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0 [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0 [<00000000646c5c2c>] genl_rcv_msg+0x78/0x120 [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0

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/4f7bddf8c5c01cac74373443b13a68e1c6723a94 Patch
https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 Patch
https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 Patch
https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94 Patch
https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 Patch
https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 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:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
History

07 Jan 2025, 20:14

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-401
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94 - () https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94 - Patch
References () https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 - () https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 - Patch
References () https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 - () https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 - Patch

21 Nov 2024, 06:36

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net/mlx5e: corrige la pérdida de memoria en la ruta de error mlx5_core_destroy_cq(). Antes de este parche, en caso de que mlx5_core_destroy_cq() fallara, regresa sin completar todas las operaciones de destrucción y eso conduce a una pérdida de memoria. En su lugar, complete el flujo de destrucción antes de que se produzca el error de devolución. También mueva mlx5_debug_cq_remove() al principio de mlx5_core_destroy_cq() para que sea simétrico con mlx5_core_create_cq(). kmemleak se queja de: objeto sin referencia 0xc000000038625100 (tamaño 64): comm "ethtool", pid 28301, jiffies 4298062946 (edad 785.380 s) volcado hexadecimal (primeros 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... rastreo hacia atrás : [&lt;000000009e8643cb&gt;] add_res_tree+0xd0/0x270 [mlx5_core] [&lt;00000000e7cb8e6c&gt;] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [&lt;000000002a12918f&gt;] 0x1d0/0x2d0 [mlx5_core] [&lt;00000000cef0a696&gt;] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [&lt;000000009c642c26&gt;] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [&lt;0000000058dfa578&gt;] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [&lt;0000000081839561&gt;] 5e_open_channels+0x9cc/0x13e0 [mlx5_core] [&lt;0000000009cf05d4&gt;] mlx5e_switch_priv_channels+0xa4 /0x230 [mlx5_core] [&lt;0000000042bbedd8&gt;] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [&lt;0000000004bc9db8&gt;] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core [&lt;00000000a] 0553443&gt;] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [&lt;00000000a8f3d84b&gt;] etnl_set_privflags +0x234/0x2d0 [&lt;00000000fd27f27c&gt;] genl_family_rcv_msg_doit+0x108/0x1d0 [&lt;00000000f495e2bb&gt;] genl_family_rcv_msg+0xe4/0x1f0 [&lt;00000000646c5c2c&gt;] v_msg+0x78/0x120 [&lt;00000000d53e384e&gt;] netlink_rcv_skb+0x74/0x1a0
References () https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94 - () https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94 -
References () https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 - () https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 -
References () https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 - () https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 -

22 May 2024, 07:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-22 07:15

Updated : 2025-01-07 20:14

NVD link : CVE-2021-47438

Mitre link : CVE-2021-47438

CVE.ORG link : CVE-2021-47438

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime