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CVE-2023-53219
media: netup_unidvb: fix use-after-free at del_timer()
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().

INFO

Published Date :

Sept. 15, 2025, 3:15 p.m.

Last Modified :

Sept. 15, 2025, 3:22 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2023-53219 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Resolve use-after-free by using del_timer_sync instead of del_timer.
  • Replace del_timer() with del_timer_sync().
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-53219.

URL Resource
https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3
https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e
https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63
https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523
https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d
https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc
https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154
https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-53219 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-53219 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-53219 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2023-53219 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Sep. 15, 2025

    Action Type Old Value New Value
    Added 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().
    Added Reference https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3
    Added Reference https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e
    Added Reference https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63
    Added Reference https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523
    Added Reference https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d
    Added Reference https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc
    Added Reference https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154
    Added Reference https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.