https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 05 Oct 2026 19:31:46 +0000 https://cve.radiocsirt.org/vuln/cve-2026-89736 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>usb: gadget: u_audio: Fix use-after-free on sound card disconnect</p> <p>g_audio_cleanup() invokes snd_card_free_when_closed() to initiate sound card teardown and immediately frees the underlying struct snd_uac_chip context. However, snd_card_free_when_closed() returns asynchronously while ALSA control elements (kctls) remain open in userspace.</p> <p>When userspace control applications access or close these open file descriptors, kctl callbacks attempt to dereference kctl-&gt;private_data pointing to &amp;uac-&gt;c_prm or &amp;uac-&gt;p_prm within the freed uac structure, resulting in a use-after-free (UAF) memory corruption.</p> <p>Fix this issue by deferring the destruction of struct snd_uac_chip until all references to the ALSA sound card are released. Register a custom card-&gt;private_free callback (u_audio_card_free) during g_audio_setup() that frees uac and its associated playback/capture request and ring buffers only when the sound card reference count drops to zero.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>usb: gadget: u_audio: Fix use-after-free on sound card disconnect</p> <p>g_audio_cleanup() invokes snd_card_free_when_closed() to initiate sound card teardown and immediately frees the underlying struct snd_uac_chip context. However, snd_card_free_when_closed() returns asynchronously while ALSA control elements (kctls) remain open in userspace.</p> <p>When userspace control applications access or close these open file descriptors, kctl callbacks attempt to dereference kctl-&gt;private_data pointing to &amp;uac-&gt;c_prm or &amp;uac-&gt;p_prm within the freed uac structure, resulting in a use-after-free (UAF) memory corruption.</p> <p>Fix this issue by deferring the destruction of struct snd_uac_chip until all references to the ALSA sound card are released. Register a custom card-&gt;private_free callback (u_audio_card_free) during g_audio_setup() that frees uac and its associated playback/capture request and ring buffers only when the sound card reference count drops to zero.</p> https://cve.radiocsirt.org/vuln/cve-2026-89736