IT

Tracker / CVE-2026-53242

CVE-2026-53242

High 7.8

In the Linux kernel, the following vulnerability has been resolved: ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams snd_pcm_drain() uses init_waitqueue_entry which does not clear entry.prev/next, and add_wait_queue with a conditional remove_wait_queue that is skipped when to_check is no longer in the group after concurrent UNLINK. The orphaned wait entry remains on the unlinked substream sleep queue. On the next drain iteration, add_wait_queue adds the entry to a new queue while still linked on the old one, corrupting both lists. A subsequent wake_up dereferences NULL at the func pointer (mapped from the spinlock at offset 0 of the misinterpreted wait_queue_head_t), causing a kernel panic. Replace init_waitqueue_entry/add_wait_queue/conditional remove_wait_queue with init_wait_entry/prepare_to_wait/ finish_wait. init_wait_entry clears prev/next via INIT_LIST_HEAD on each iteration and sets autoremove_wake_function which auto-removes the entry on wake-up. finish_wait safely handles both the already-removed and still-queued cases.

Affected products and versions

linux linux_kernel
linux linux_kernel · 5.10.253 → 5.10.259
linux linux_kernel · 6.1.167 → 6.1.176
linux linux_kernel · 6.12.78 → 6.12.94
linux linux_kernel · 6.18.19 → 6.18.36
linux linux_kernel · 6.19.9 → 7.0
linux linux_kernel · 6.6.130 → 6.6.143
linux linux_kernel · 7.0.1 → 7.0.13

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References