CVE-2022-49295

In the Linux kernel, the following vulnerability has been resolved: nbd: call genl_unregister_family() first in nbd_cleanup() Otherwise there may be race between module removal and the handling of netlink command, which can lead to the oops as shown below: BUG: kernel NULL pointer dereference, address: 0000000000000098 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:down_write+0x1a/0x50 Call Trace: start_creating+0x89/0x130 debugfs_create_dir+0x1b/0x130 nbd_start_device+0x13d/0x390 [nbd] nbd_genl_connect+0x42f/0x748 [nbd] genl_family_rcv_msg_doit.isra.0+0xec/0x150 genl_rcv_msg+0xe5/0x1e0 netlink_rcv_skb+0x55/0x100 genl_rcv+0x29/0x40 netlink_unicast+0x1a8/0x250 netlink_sendmsg+0x21b/0x430 ____sys_sendmsg+0x2a4/0x2d0 ___sys_sendmsg+0x81/0xc0 __sys_sendmsg+0x62/0xb0 __x64_sys_sendmsg+0x1f/0x30 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae Modules linked in: nbd(E-)

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

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/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c	Patch
https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e	Patch
https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e	Patch
https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79	Patch
https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f	Patch
https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25	Patch
https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca	Patch
https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db	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::::::::

History

14 Apr 2025, 20:08

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: llamar a genl_unregister_family() primero en nbd_cleanup() De lo contrario, puede haber una ejecución entre la eliminación del módulo y la gestión del comando netlink, lo que puede provocar los errores que se muestran a continuación: ERROR: desreferencia de puntero NULL del kernel, dirección: 0000000000000098 Error: 0002 [#1] SMP PTI CPU: 1 PID: 31299 Comm: nbd-client Contaminado: GE 5.14.0-rc4 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:down_write+0x1a/0x50 Rastreo de llamadas: start_creating+0x89/0x130 debugfs_create_dir+0x1b/0x130 nbd_start_device+0x13d/0x390 [nbd] nbd_genl_connect+0x42f/0x748 [nbd] genl_family_rcv_msg_doit.isra.0+0xec/0x150 genl_rcv_msg+0xe5/0x1e0 netlink_rcv_skb+0x55/0x100 genl_rcv+0x29/0x40 netlink_unicast+0x1a8/0x250 netlink_sendmsg+0x21b/0x430 ____sys_sendmsg+0x2a4/0x2d0 ___sys_sendmsg+0x81/0xc0 __sys_sendmsg+0x62/0xb0 __x64_sys_sendmsg+0x1f/0x30 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae Módulos vinculados en: nbd(E-)
CPE		cpe:2.3:o:linux:linux_kernel::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.7
References	~~() https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c -~~	() https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c - Patch
References	~~() https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e -~~	() https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e - Patch
References	~~() https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e -~~	() https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e - Patch
References	~~() https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79 -~~	() https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79 - Patch
References	~~() https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f -~~	() https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f - Patch
References	~~() https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25 -~~	() https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25 - Patch
References	~~() https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca -~~	() https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca - Patch
References	~~() https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db -~~	() https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db - Patch
CWE		CWE-476
First Time		Linux linux Kernel Linux

26 Feb 2025, 07:01

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-02-26 07:01

Updated : 2025-04-14 20:08

NVD link : CVE-2022-49295

Mitre link : CVE-2022-49295

CVE.ORG link : CVE-2022-49295

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: call genl_unregister_family() first in nbd_cleanup()\n\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000098\n Oops: 0002 [#1] SMP PTI\n CPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n RIP: 0010:down_write+0x1a/0x50\n Call Trace:\n start_creating+0x89/0x130\n debugfs_create_dir+0x1b/0x130\n nbd_start_device+0x13d/0x390 [nbd]\n nbd_genl_connect+0x42f/0x748 [nbd]\n genl_family_rcv_msg_doit.isra.0+0xec/0x150\n genl_rcv_msg+0xe5/0x1e0\n netlink_rcv_skb+0x55/0x100\n genl_rcv+0x29/0x40\n netlink_unicast+0x1a8/0x250\n netlink_sendmsg+0x21b/0x430\n ____sys_sendmsg+0x2a4/0x2d0\n ___sys_sendmsg+0x81/0xc0\n __sys_sendmsg+0x62/0xb0\n __x64_sys_sendmsg+0x1f/0x30\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n Modules linked in: nbd(E-)"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: llamar a genl_unregister_family() primero en nbd_cleanup() De lo contrario, puede haber una ejecuci\u00f3n entre la eliminaci\u00f3n del m\u00f3dulo y la gesti\u00f3n del comando netlink, lo que puede provocar los errores que se muestran a continuaci\u00f3n: ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000098 Error: 0002 [#1] SMP PTI CPU: 1 PID: 31299 Comm: nbd-client Contaminado: GE 5.14.0-rc4 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:down_write+0x1a/0x50 Rastreo de llamadas: start_creating+0x89/0x130 debugfs_create_dir+0x1b/0x130 nbd_start_device+0x13d/0x390 [nbd] nbd_genl_connect+0x42f/0x748 [nbd] genl_family_rcv_msg_doit.isra.0+0xec/0x150 genl_rcv_msg+0xe5/0x1e0 netlink_rcv_skb+0x55/0x100 genl_rcv+0x29/0x40 netlink_unicast+0x1a8/0x250 netlink_sendmsg+0x21b/0x430 ____sys_sendmsg+0x2a4/0x2d0 ___sys_sendmsg+0x81/0xc0 __sys_sendmsg+0x62/0xb0 __x64_sys_sendmsg+0x1f/0x30 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae M\u00f3dulos vinculados en: nbd(E-)"}], "lastModified": "2025-04-14T20:08:12.880", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "42074657-A7B6-4740-88B7-67B440018C1C", "versionEndExcluding": "4.14.283"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B", "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9", "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1B42AA01-44D8-4572-95E6-FF8E374CF9C5", "versionEndExcluding": "5.10.122", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FC042EE3-4864-4325-BE0B-4BCDBF11AA61", "versionEndExcluding": "5.15.47", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD", "versionEndExcluding": "5.17.15", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103", "versionEndExcluding": "5.18.4", "versionStartIncluding": "5.18"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

4.7 /10