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CVE-2022-49295

7.0 · HIGH

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 o…

Published Feb 26, 2025CWE-476EPSS 0.25%

Overview

CVE-2022-49295 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5cRefgit.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6eRefgit.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33eRefgit.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79Refgit.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6fRefgit.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25Refgit.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbcaRefgit.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49295?

CVE-2022-49295 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2022-49295?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49295?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49295?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49295 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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