Answer in brief
CVE-2026-90207 records a Unknown severity vulnerability in ALSA: seq: midi: Serialize input teardown with event_input. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de76a2b47582cd6dba2e15f024681bf377ecc94a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <89d986897aff7275b42e075e556731b8353366af || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6290afaae54c7a9fa3bca3b4d5433e6d83e8669d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <210c193a9ef1312fab153948c6928e4cfaa1f03b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <282a3ef9e4b63b2f6823bbbb3c1a90b002cdaf12 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <403f7f3ad3808a0096d84cf228fab68dc253fd9d | de76a2b47582cd6dba2e15f024681bf377ecc94a, 89d986897aff7275b42e075e556731b8353366af, 6290afaae54c7a9fa3bca3b4d5433e6d83e8669d, 210c193a9ef1312fab153948c6928e4cfaa1f03b, 282a3ef9e4b63b2f6823bbbb3c1a90b002cdaf12, 403f7f3ad3808a0096d84cf228fab68dc253fd9d |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: midi: Serialize input teardown with event_input snd_midi_input_event() must not be running while a rawmidi substream is closing, since this can lead to the trigger state becoming out-of-step through this sequence in snd_rawmidi_input_trigger(): snd_rawmidi_input_trigger(up=0) snd_midi_input_event() -> snd_rawmidi_kernel_read() -> snd_rawmidi_input_trigger(up=1) -> cancel_work_sync() which ends with the underlying device being active unexpectedly. When this is called from close_substream(), further input can re-trigger the input event leaving it running after rawmidi_release_priv() has set rfile->rmidi to NULL which leads to: Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b0 Call trace: snd_midi_input_event+0x3c/0x134 [snd_seq_midi] (P) snd_rawmidi_input_event_work+0x1c/0x2c process_one_work+0x150/0x3a4 worker_thread+0x190/0x318 Apply a similar approach to commit ef7607ab1c8ad ("ALSA: seq: midi: Serialize output teardown with event_input") which fixed the same issue in the output direction, but updated to use RCU following Takashi Iwai's proposed follow-on patch [1]. With this change in place, midisynth_unsubscribe() clears the input file so snd_midi_input_event() will not re-trigger the stream and will be quiesced by the cancel_work_sync() in snd_rawmidi_input_trigger(). [1] https://lore.kernel.org/linux-sound/[email protected]/
Quoted source text, attributed separately from HOL analysis.