CVE-2026-90207 Linux Kernel ALSA seq midi - Denial of Service

Linux kernel ALSA seq midi contains a NULL pointer dereference caused by unsynchronized input teardown in snd_midi_input_event during rawmidi substream closing, letting attackers cause kernel crash, exploit requires triggering rawmidi input events.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the patch for this issue.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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