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CVE-2026-98314: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: set timer->private_data before registering the PCM timer snd_pcm_timer_init() calls snd_device_register() to link the new struct snd_timer into the global timer list while it still carries hw.c_resolution = snd_pcm_timer_resolution (and hw.start/hw.stop), and only afterwards sets timer->private_data = substream. Once the timer is on the list under register_mutex, a concurrent reader can already reach it through the same mutex and invoke these callbacks. /proc/asound/timers does this via c_resolution(), and snd_timer_open()+snd_timer_start() reach start()/stop() the same way. All three dereference timer->private_data, which for this brief window is NULL, giving a NULL-pointer dereference: substream = timer->private_data; return substream->runtime ? ... // substream is NULL Move the private_data/private_free assignment before snd_device_register() so the timer is never visible on the list without its private_data set. On the snd_device_register() failure path, private_free() (snd_pcm_timer_free()) can now run, but it only does substream->timer = NULL, which is already NULL at that point since substream->timer is set to the new timer just once, after a successful registration -- so the failure path stays safe.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 27f167e117eca310661fbcbacb352ea08face067; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 555d168bd98daa46daccc68c908201388c834293; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 8c869d5cf5affb20994bdbb60e7d46d65c91b55f; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 686c7a6af1eea8d2a919303e4c6bbec3de79dbdc; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди e1eee8f16628f8b6bcae0a366fd6a2dd65e71edd; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d63f5a9f8121fb43c798056d7dd34c58f47185d7; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 0b349249d572633d7c8cdeb917623d1676a2b7c3; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 1e713f9bb2ac583521f06b0eb4e22440b1e3d078
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.54 до 6.18.*; 7.2.8 до 7.2.*; от 7.3 нататък

    История

    • 6 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98314: Linux | freedomonline.bg