{"cve":"CVE-2023-52847","nvd":{"published":"2024-05-21T16:15:21.873","modified":"2026-08-04T10:18:45.987","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: bttv: fix use after free error due to btv->timeout timer\n\nThere may be some a race condition between timer function\nbttv_irq_timeout and bttv_remove. The timer is setup in\nprobe and there is no timer_delete operation in remove\nfunction. When it hit kfree btv, the function might still be\ninvoked, which will cause use after free bug.\n\nThis bug is found by static analysis, it may be false positive.\n\nFix it by adding del_timer_sync invoking to the remove function.\n\ncpu0                cpu1\n                  bttv_probe\n                    ->timer_setup\n                      ->bttv_set_dma\n                        ->mod_timer;\nbttv_remove\n  ->kfree(btv);\n                  ->bttv_irq_timeout\n                    ->USE btv","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.0},"cwes":["CWE-362","CWE-416"],"references":["https://git.kernel.org/stable/c/1871014d6ef4812ad11ef7d838d73ce09d632267","https://git.kernel.org/stable/c/20568d06f6069cb835e05eed432edf962645d226","https://git.kernel.org/stable/c/2f3d9198cdae1cb079ec8652f4defacd481eab2b","https://git.kernel.org/stable/c/51c94256a83fe4e17406c66ff3e1ad7d242d8574","https://git.kernel.org/stable/c/847599fffa528b2cdec4e21b6bf7586dad982132"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2023-52847","score":0.00188,"percentile":0.08396,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}