{"id":"CVE-2023-53219","summary":"media: netup_unidvb: fix use-after-free at del_timer()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: netup_unidvb: fix use-after-free at del_timer()\n\nWhen Universal DVB card is detaching, netup_unidvb_dma_fini()\nuses del_timer() to stop dma-\u003etimeout timer. But when timer\nhandler netup_unidvb_dma_timeout() is running, del_timer()\ncould not stop it. As a result, the use-after-free bug could\nhappen. The process is shown below:\n\n    (cleanup routine)          |        (timer routine)\n                               | mod_timer(&dev-\u003etx_sim_timer, ..)\nnetup_unidvb_finidev()         | (wait a time)\n  netup_unidvb_dma_fini()      | netup_unidvb_dma_timeout()\n    del_timer(&dma-\u003etimeout);  |\n                               |   ndev-\u003epci_dev-\u003edev //USE\n\nFix by changing del_timer() to del_timer_sync().","modified":"2026-04-02T09:43:49.317124Z","published":"2025-09-15T14:21:47.459Z","related":["SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53219.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523"},{"type":"WEB","url":"https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53219.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53219"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e"},{"fixed":"dd5c77814f290b353917df329f36de1472d47154"},{"fixed":"90229e9ee957d4514425e4a4d82c50ab5d57ac4d"},{"fixed":"1550bcf2983ae1220cc8ab899a39a423fa7cb523"},{"fixed":"f9982db735a8495eee14267cf193c806b957e942"},{"fixed":"051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3"},{"fixed":"07821524f67bf920342bc84ae8b3dea2a315a89e"},{"fixed":"c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc"},{"fixed":"0f5bb36bf9b39a2a96e730bf4455095b50713f63"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53219.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}