CVE-2026-90207

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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]/

CVSS v3
7.8
EG Score
7.8HIGHhigh confidence
EG Risk
40
EG Risk 40/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (6)

Auto-updated Sep 18, 2026
No patch confirmed yet.
generic

ALSA: seq: midi: Serialize input teardown with event_input - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/de76a2b47582cd6dba2e15f024681bf377ecc94a
generic

ALSA: seq: midi: Serialize input teardown with event_input - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/89d986897aff7275b42e075e556731b8353366af
generic

ALSA: seq: midi: Serialize input teardown with event_input - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6290afaae54c7a9fa3bca3b4d5433e6d83e8669d
generic

ALSA: seq: midi: Serialize input teardown with event_input - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/403f7f3ad3808a0096d84cf228fab68dc253fd9d
generic

ALSA: seq: midi: Serialize input teardown with event_input - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/282a3ef9e4b63b2f6823bbbb3c1a90b002cdaf12
generic

ALSA: seq: midi: Serialize input teardown with event_input - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/210c193a9ef1312fab153948c6928e4cfaa1f03b

Vendor Advisories for CVE-2026-90207(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 29× in last 7d / 76× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 12:03 UTCGHSA enrichment
  2. 2026-10-05 01:13 UTCEG score recompute
  3. 2026-10-05 01:13 UTCGHSA enrichment
  4. 2026-10-04 23:22 UTCEPSS rescore
  5. 2026-10-04 14:23 UTCGHSA enrichment
  6. 2026-10-04 03:16 UTCGHSA enrichment
  7. 2026-10-03 16:25 UTCEG score recompute
  8. 2026-10-03 16:25 UTCGHSA enrichment
  9. 2026-10-03 05:36 UTCGHSA enrichment
  10. 2026-10-02 18:46 UTCEG score recompute
  11. 2026-10-02 18:46 UTCGHSA enrichment
  12. 2026-10-02 07:53 UTCGHSA enrichment
  13. 2026-10-01 21:03 UTCEG score recompute
  14. 2026-10-01 21:03 UTCGHSA enrichment
  15. 2026-10-01 19:51 UTCEPSS rescore
  16. 2026-10-01 10:13 UTCGHSA enrichment
  17. 2026-09-30 23:24 UTCEG score recompute
  18. 2026-09-30 23:24 UTCGHSA enrichment
  19. 2026-09-30 15:04 UTCEPSS rescore
  20. 2026-09-30 12:31 UTCGHSA enrichment
  21. 2026-09-30 01:39 UTCEG score recompute
  22. 2026-09-30 01:39 UTCGHSA enrichment
  23. 2026-09-29 14:49 UTCGHSA enrichment
  24. 2026-09-29 04:00 UTCEG score recompute
  25. 2026-09-29 03:59 UTCGHSA enrichment
Show 51 more
  1. 2026-09-28 17:06 UTCEG score recompute
  2. 2026-09-28 17:06 UTCGHSA enrichment
  3. 2026-09-28 13:52 UTCEPSS rescore
  4. 2026-09-28 13:52 UTCEPSS rescore
  5. 2026-09-28 06:03 UTCGHSA enrichment
  6. 2026-09-27 19:14 UTCEG score recompute
  7. 2026-09-27 19:14 UTCGHSA enrichment
  8. 2026-09-27 13:49 UTCEPSS rescore
  9. 2026-09-27 08:25 UTCGHSA enrichment
  10. 2026-09-26 21:35 UTCEG score recompute
  11. 2026-09-26 21:35 UTCGHSA enrichment
  12. 2026-09-26 15:59 UTCEPSS rescore
  13. 2026-09-26 10:44 UTCEG score recompute
  14. 2026-09-26 10:44 UTCGHSA enrichment
  15. 2026-09-25 23:49 UTCGHSA enrichment
  16. 2026-09-25 12:58 UTCGHSA enrichment
  17. 2026-09-25 02:07 UTCGHSA enrichment
  18. 2026-09-24 15:17 UTCEG score recompute
  19. 2026-09-24 15:17 UTCGHSA enrichment
  20. 2026-09-24 14:04 UTCEPSS rescore
  21. 2026-09-24 04:28 UTCEG score recompute
  22. 2026-09-24 04:28 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 17:39 UTCGHSA enrichment
  25. 2026-09-23 06:49 UTCGHSA enrichment
  26. 2026-09-22 19:59 UTCEG score recompute
  27. 2026-09-22 19:59 UTCGHSA enrichment
  28. 2026-09-22 16:01 UTCEPSS rescore
  29. 2026-09-22 09:09 UTCGHSA enrichment
  30. 2026-09-21 22:19 UTCEG score recompute
  31. 2026-09-21 22:19 UTCGHSA enrichment
  32. 2026-09-21 21:09 UTCEPSS rescore
  33. 2026-09-21 11:29 UTCGHSA enrichment
  34. 2026-09-21 00:39 UTCEG score recompute
  35. 2026-09-21 00:39 UTCGHSA enrichment
  36. 2026-09-20 20:16 UTCEPSS rescore
  37. 2026-09-20 13:49 UTCGHSA enrichment
  38. 2026-09-20 02:59 UTCGHSA enrichment
  39. 2026-09-19 16:10 UTCEG score recompute
  40. 2026-09-19 16:10 UTCGHSA enrichment
  41. 2026-09-19 05:20 UTCEG score recompute
  42. 2026-09-19 05:20 UTCGHSA enrichment
  43. 2026-09-18 19:28 UTCEPSS rescore
  44. 2026-09-18 18:31 UTCEG score recompute
  45. 2026-09-18 18:31 UTCGHSA enrichment
  46. 2026-09-18 18:04 UTCEG score recompute▲ 7.80
  47. 2026-09-18 18:04 UTCGHSA enrichment
  48. 2026-09-18 17:59 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  49. 2026-09-17 17:23 UTCNVD update
  50. 2026-09-17 16:40 UTCEG score recompute
  51. 2026-09-17 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90207?
CVE-2026-90207 is a high vulnerability published on September 17, 2026. In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: midi: Serialize input teardown with event_input sndmidiinput_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…
When was CVE-2026-90207 disclosed?
CVE-2026-90207 was first published on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90207 actively exploited?
CVE-2026-90207 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90207?
CVE-2026-90207 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90207?
No fix for CVE-2026-90207 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-90207 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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