{"id":"CVE-2026-90032","published":"2026-09-16T11:17:16.310","lastModified":"2026-09-16T15:18:26.280","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: usbtv: keep device alive while ALSA card exists\n\nThe ALSA PCM callbacks store the driver state in pcm->private_data. An\nopen PCM file can outlive USB disconnect because usbtv_audio_free() uses\nsnd_card_free_when_closed(). The disconnect path can then drop the V4L2\ndevice reference and free struct usbtv before ALSA releases the substream,\nso a later close dereferences freed memory in snd_usbtv_pcm_close().\n\nTake a V4L2 device reference for the ALSA card and drop it from the card\nprivate_free callback. This keeps struct usbtv valid until ALSA has closed\nthe remaining files and freed the card.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb","tags":[]},{"url":"https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8","tags":[]},{"url":"https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27","tags":[]},{"url":"https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957","tags":[]},{"url":"https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4","tags":[]},{"url":"https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5","tags":[]},{"url":"https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175","tags":[]},{"url":"https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This vulnerability allows an attacker to cause a use-after-free condition in the Linux kernel's usbtv driver, leading to potential memory corruption or execution of arbitrary code.","exploitability":"Exploitation requires an attacker to have access to an open ALSA PCM file while the corresponding USB device is disconnected. This is moderately difficult to achieve.","blast_radius":"If exploited, the vulnerability could lead to a denial of service or potentially execute arbitrary code with kernel privileges.","remediation":"Upgrade to the Linux kernel version 6.1.18 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["kernel","memory-corruption","usb","alsa"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-07T08:45:25.860Z"}}