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CVE-2026-89736: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_audio: Fix use-after-free on sound card disconnect 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. When userspace control applications access or close these open file descriptors, kctl callbacks attempt to dereference kctl->private_data pointing to &uac->c_prm or &uac->p_prm within the freed uac structure, resulting in a use-after-free (UAF) memory corruption. 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->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.

    Засегнати продукти

    • Linux Linux: 33f341c1fc60e172a3515c51bdabee11e83d1ee9 преди a7ecd1a04f4f485d7be6443d0f0b2c61a800cb82; b131989797f7287d7fdadb2bababc05a15d44750 преди f983793f03148b097977f200298db215cd2d4438; 3bc7324e4911351e39c54a62e6ca46321cb10faf преди 6f46762196f04464e1050a9ee94e72b917db9010; 6c67ed9ad9b83e453e808f9b31a931a20a25629b преди 891a8d11f4d5eb50b2ce7570f4f98204a7a57493; 6c67ed9ad9b83e453e808f9b31a931a20a25629b преди c74ff0b1a0fca53d3ac185873c87d6a719b30a47; 6c67ed9ad9b83e453e808f9b31a931a20a25629b преди 4e747c864a88537e18b1ffc19a1954c9686bb8e1; 6c67ed9ad9b83e453e808f9b31a931a20a25629b преди 79a92896e2bb9471550c56fc23d8d93592f04c27; 6c67ed9ad9b83e453e808f9b31a931a20a25629b преди 858965947081d10d41d9a1010a540d3d5eea958b; 3e016ef2e72da93a2ea7afbb45de1b481b44d761; 3256e152b645fc1e788ba44c2d8ced690113e3e6; 0eda2004f38d95ef5715d62be884cd344260535b; 43ca70753dfffd517d2af126da28690f8f615605; 5.10.177 преди 5.10.270; 5.15.105 преди 5.15.221; 6.1.22 преди 6.1.188; 4.14.312 преди 4.15; 4.19.280 преди 4.20; 5.4.240 преди 5.5; 6.2.9 преди 6.3
    • Linux Linux: 6.3; преди 6.3; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89736: Linux | freedomonline.bg