Answer in brief
CVE-2023-53219 records a High severity (CVSS 7.8) vulnerability in media: netup_unidvb: fix use-after-free at del_timer(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <dd5c77814f290b353917df329f36de1472d47154 || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <90229e9ee957d4514425e4a4d82c50ab5d57ac4d || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <1550bcf2983ae1220cc8ab899a39a423fa7cb523 || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <f9982db735a8495eee14267cf193c806b957e942 || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3 || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <07821524f67bf920342bc84ae8b3dea2a315a89e || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc || >=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <0f5bb36bf9b39a2a96e730bf4455095b50713f63 | dd5c77814f290b353917df329f36de1472d47154, 90229e9ee957d4514425e4a4d82c50ab5d57ac4d, 1550bcf2983ae1220cc8ab899a39a423fa7cb523, f9982db735a8495eee14267cf193c806b957e942, 051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3, 07821524f67bf920342bc84ae8b3dea2a315a89e, c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc, 0f5bb36bf9b39a2a96e730bf4455095b50713f63 |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.