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CVE-2024-49855

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: nbd: fix race between timeout and normal completion If request timetout is handled by nbd_requeue_cmd(), normal completion has…

Published Oct 21, 2024CWE-416EPSS 0.46%

Overview

CVE-2024-49855 is a critical-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

nbd: fix race between timeout and normal completion

If request timetout is handled by nbd_requeue_cmd(), normal completion

has to be stopped for avoiding to complete this requeued request, other

use-after-free can be triggered.

Fix the race by clearing NBD_CMD_INFLIGHT in nbd_requeue_cmd(), meantime

make sure that cmd->lock is grabbed for clearing the flag and the

requeue.

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/5236ada8ebbd9e7461f17477357582f5be4f46f7Refgit.kernel.org/stable/c/6e73b946a379a1dfbb62626af93843bdfb53753dRefgit.kernel.org/stable/c/9a74c3e6c0d686c26ba2aab66d15ddb89dc139ccRefgit.kernel.org/stable/c/9c25faf72d780a9c71081710cd48759d61ff6e9bRefgit.kernel.org/stable/c/c9ea57c91f03bcad415e1a20113bdb2077bcf990Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-49855?

CVE-2024-49855 is a critical-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-49855?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-49855?

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-2024-49855?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-49855 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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