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CVE-2023-53219

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: media: netup_unidvb: fix use-after-free at del_timer() When Universal DVB card is detaching, netup_unidvb_dma_fini() uses del_t…

Published Sep 15, 2025CWE-416EPSS 0.16%

Overview

CVE-2023-53219 is a high-severity vulnerability. It was published on September 15, 2025 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: netup_unidvb: fix use-after-free at del_timer()

When Universal DVB card is detaching, netup_unidvb_dma_fini()

uses del_timer() to stop dma->timeout timer. But when timer

handler netup_unidvb_dma_timeout() is running, del_timer()

could not stop it. As a result, the use-after-free bug could

happen. The process is shown below:

(cleanup routine) | (timer routine)

| mod_timer(&dev->tx_sim_timer, ..)

netup_unidvb_finidev() | (wait a time)

netup_unidvb_dma_fini() | netup_unidvb_dma_timeout()

del_timer(&dma->timeout); |

| ndev->pci_dev->dev //USE

Fix by changing del_timer() to del_timer_sync().

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/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3Refgit.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89eRefgit.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63Refgit.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523Refgit.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4dRefgit.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fcRefgit.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154Refgit.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53219?

CVE-2023-53219 is a high-severity vulnerability. It was published on September 15, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53219?

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-2023-53219?

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-2023-53219?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53219 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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