CVE-2026-98308: ALSA: hda: trace PCM open only after assigning a stream

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: trace PCM open only after assigning a stream Stream assignment can fail when hardware streams are exhausted. Move the tracepoint after the NULL check because its payload accesses the assigned stream tag. Detected by static analysis and reviewed with AI-assisted source auditing.

Affected products

Linux kernel: 4.2 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0a52ba6d3b268bb82f0ec4cb861bc68d252369c0
https://git.kernel.org/stable/c/3c6ca6d9342f4a0be7c1413180e11023d13b5cde
https://git.kernel.org/stable/c/3db8afba2d210b7d80cd5cc6b76d7f46daa9b47a
https://git.kernel.org/stable/c/5a4c974dee03cc46eac43c82f33e34ec94f0b348
https://git.kernel.org/stable/c/5c89e7965220e85d06ae4c58adb7d7bb6da2440c
https://git.kernel.org/stable/c/8477643cb91c9e09ac1b11890eef421ae63e53f7
https://git.kernel.org/stable/c/c9e6e5f38bf75276605f1952b22285f5f3abcaff
https://git.kernel.org/stable/c/fba079ea22822248c82c3a999c88676d05b17bda

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