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CVE-2024-26587

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: netdevsim: don't try to destroy PHC on VFs PHC gets initialized in nsim_init_netdevsim(), which is only called if (nsim_de…

Published Feb 22, 2024CWE-476EPSS 0.22%

Overview

CVE-2024-26587 is a medium-severity vulnerability. It was published on February 22, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

net: netdevsim: don't try to destroy PHC on VFs

PHC gets initialized in nsim_init_netdevsim(), which

is only called if (nsim_dev_port_is_pf()).

Create a counterpart of nsim_init_netdevsim() and

move the mock_phc_destroy() there.

This fixes a crash trying to destroy netdevsim with

VFs instantiated, as caught by running the devlink.sh test:

BUG: kernel NULL pointer dereference, address: 00000000000000b8

RIP: 0010:mock_phc_destroy+0xd/0x30

Call Trace:

<TASK>

nsim_destroy+0x4a/0x70 [netdevsim]

__nsim_dev_port_del+0x47/0x70 [netdevsim]

nsim_dev_reload_destroy+0x105/0x120 [netdevsim]

nsim_drv_remove+0x2f/0xb0 [netdevsim]

device_release_driver_internal+0x1a1/0x210

bus_remove_device+0xd5/0x120

device_del+0x159/0x490

device_unregister+0x12/0x30

del_device_store+0x11a/0x1a0 [netdevsim]

kernfs_fop_write_iter+0x130/0x1d0

vfs_write+0x30b/0x4b0

ksys_wr

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/08aca65997fb6f233066883b1f1e653bcb1f26caRefgit.kernel.org/stable/c/c5068e442eed063d2f1658e6b6d3c1c6fcf1e588Refgit.kernel.org/stable/c/ea937f77208323d35ffe2f8d8fc81b00118bfcdaRefgit.kernel.org/stable/c/08aca65997fb6f233066883b1f1e653bcb1f26caRefgit.kernel.org/stable/c/c5068e442eed063d2f1658e6b6d3c1c6fcf1e588Refgit.kernel.org/stable/c/ea937f77208323d35ffe2f8d8fc81b00118bfcda

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26587?

CVE-2024-26587 is a medium-severity vulnerability. It was published on February 22, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26587?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26587?

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-2024-26587?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26587 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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