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CVE-2023-52847

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_…

Published May 21, 2024CWE-362EPSS 0.19%

Overview

CVE-2023-52847 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

media: bttv: fix use after free error due to btv->timeout timer

There may be some a race condition between timer function

bttv_irq_timeout and bttv_remove. The timer is setup in

probe and there is no timer_delete operation in remove

function. When it hit kfree btv, the function might still be

invoked, which will cause use after free bug.

This bug is found by static analysis, it may be false positive.

Fix it by adding del_timer_sync invoking to the remove function.

cpu0 cpu1

bttv_probe

->timer_setup

->bttv_set_dma

->mod_timer;

bttv_remove

->kfree(btv);

->bttv_irq_timeout

->USE btv

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/1871014d6ef4812ad11ef7d838d73ce09d632267Refgit.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226Refgit.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2bRefgit.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574Refgit.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132Refgit.kernel.org/stable/c/b35fdade92c5058a5e727e233fe263b828de2c9aRefgit.kernel.org/stable/c/bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9Refgit.kernel.org/stable/c/bd5b50b329e850d467e7bcc07b2b6bde3752fbdaRefgit.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267Refgit.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52847?

CVE-2023-52847 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-52847?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2023-52847?

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-2023-52847?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52847 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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