VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98770: Linux kernel · usb: gadget: midi2: Fix the jack descriptor array sizes

Source GCVE Database

Authoritative record:CVE-2026-98770

Not known to be exploited · fixed in 18138d9f19cf6944ff09f5c8c0930545036fe3d0 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 18138d9f19cf6944ff09f5c8c0930545036fe3d0, 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574, 310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-2cr9-h7x6-p393

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 856fa444b0982746f95e801bab0e586533eb29a3, < 18138d9f19cf6944ff09f5c8c0930545036fe3d0	Fixed in 18138d9f19cf6944ff09f5c8c0930545036fe3d0
LinuxLinux	Affected ≥ 856fa444b0982746f95e801bab0e586533eb29a3, < 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574	Fixed in 8294ff75a9de23f7cc641e5e5ca31fa6ea72a574
LinuxLinux	Affected ≥ 856fa444b0982746f95e801bab0e586533eb29a3, < 310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1	Fixed in 310c2d4608d8c1a2baa57db1dfd319c5c40cf4a1
LinuxLinux	Affected ≥ 856fa444b0982746f95e801bab0e586533eb29a3, < 223c3bd02a582776d8ee47dae7b69d3258420694	Fixed in 223c3bd02a582776d8ee47dae7b69d3258420694
LinuxLinux	Affected ≥ 856fa444b0982746f95e801bab0e586533eb29a3, < 87f2185423e01f113811301878f2f67eccec960d	Fixed in 87f2185423e01f113811301878f2f67eccec960d
LinuxLinux	Affected =6.6	Fixed in–

AI-suggested

A fix is available that corrects the jack descriptor array sizes to twice MAX_CABLES. Users should update their Linux kernel to a version that includes this fix. Since this is a kernel-level issue, applying the official kernel patch or upgrading to a fixed kernel release is the recommended remediation.

Description

A vulnerability in the Linux kernel's USB gadget MIDI2 driver was resolved by correcting the jack descriptor array sizes. The jack in/out descriptor arrays were incorrectly sized as MAX_CABLES, but since entries are added for both inputs and outputs, the arrays needed to be sized at twice MAX_CABLES. This mismatch could lead to out-of-bounds (OOB) access when a large number of jacks are configured via configfs. The issue was fixed by adjusting the array sizes to MAX_CABLES * 2.

References

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