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CVE-2024-35887

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ax25: fix use-after-free bugs caused by ax25_ds_del_timer When the ax25 device is detaching, the ax25_dev_device_down() calls a…

Published May 19, 2024CWE-416EPSS 0.34%

Overview

CVE-2024-35887 is a high-severity vulnerability. It was published on May 19, 2024 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

ax25: fix use-after-free bugs caused by ax25_ds_del_timer

When the ax25 device is detaching, the ax25_dev_device_down()

calls ax25_ds_del_timer() to cleanup the slave_timer. When

the timer handler is running, the ax25_ds_del_timer() that

calls del_timer() in it will return directly. As a result,

the use-after-free bugs could happen, one of the scenarios

is shown below:

(Thread 1) | (Thread 2)

| ax25_ds_timeout()

ax25_dev_device_down() |

ax25_ds_del_timer() |

del_timer() |

ax25_dev_put() //FREE |

| ax25_dev-> //USE

In order to mitigate bugs, when the device is detaching, use

timer_shutdown_sync() to stop the timer.

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/74204bf9050f7627aead9875fe4e07ba125cb19bRefgit.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9Refgit.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89Refgit.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19bRefgit.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9Refgit.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89

How CyberStrike helps

Frequently asked questions

What is CVE-2024-35887?

CVE-2024-35887 is a high-severity vulnerability. It was published on May 19, 2024 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2024-35887?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-35887?

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-2024-35887?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-35887 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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