CVE-2024-26587

5.5 · MEDIUM

Published Feb 22, 2024 linux CWE-476 EPSS 0.23% (13th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-26587 is a medium-severity vulnerability affecting linux linux_kernel. 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 and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 0, < 6.6.14	Affected

References

Ref git.kernel.org/stable/c/08aca65997fb6f233066883b1f1e653bcb1f26ca Ref git.kernel.org/stable/c/c5068e442eed063d2f1658e6b6d3c1c6fcf1e588 Ref git.kernel.org/stable/c/ea937f77208323d35ffe2f8d8fc81b00118bfcda Ref git.kernel.org/stable/c/08aca65997fb6f233066883b1f1e653bcb1f26ca Ref git.kernel.org/stable/c/c5068e442eed063d2f1658e6b6d3c1c6fcf1e588 Ref git.kernel.org/stable/c/ea937f77208323d35ffe2f8d8fc81b00118bfcda

Frequently Asked Questions

What is CVE-2024-26587?

CVE-2024-26587 is a medium-severity vulnerability affecting linux linux_kernel. 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?

How can CyberStrike help with CVE-2024-26587?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26587 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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HackBrowser

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