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 :
Dec. 3, 2025, 3:32 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- 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.
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.
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.
-
Initial Analysis by [email protected]
Dec. 03, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.244 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.284 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.3.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.30 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.3 up to (excluding) 4.14.316 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.181 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.113 Added Reference Type kernel.org: https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942 Types: Patch -
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