VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-90374: Linux kernel · wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in b1c5cf8903bec5476a2233b4e45287b9a2213e02 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:30 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in b1c5cf8903bec5476a2233b4e45287b9a2213e02, 2243778a5fae8329ab5f18e7adcd7e03b911a1b7, 535091c587268cc783608642838a655d828eefdd +2

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 98686cd21624c75a043e96812beadddf4f6f48e5, < b1c5cf8903bec5476a2233b4e45287b9a2213e02	Fixed in b1c5cf8903bec5476a2233b4e45287b9a2213e02
LinuxLinux	Affected ≥ 98686cd21624c75a043e96812beadddf4f6f48e5, < 2243778a5fae8329ab5f18e7adcd7e03b911a1b7	Fixed in 2243778a5fae8329ab5f18e7adcd7e03b911a1b7
LinuxLinux	Affected ≥ 98686cd21624c75a043e96812beadddf4f6f48e5, < 535091c587268cc783608642838a655d828eefdd	Fixed in 535091c587268cc783608642838a655d828eefdd
LinuxLinux	Affected ≥ 98686cd21624c75a043e96812beadddf4f6f48e5, < 493a029c205a994644327d554f0cfeb9651aba7c	Fixed in 493a029c205a994644327d554f0cfeb9651aba7c
LinuxLinux	Affected ≥ 98686cd21624c75a043e96812beadddf4f6f48e5, < 0f53ece876e1f3bbb3e18f48afc4af1ee967b16c	Fixed in 0f53ece876e1f3bbb3e18f48afc4af1ee967b16c
LinuxLinux	Affected =6.2	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[] band_idx comes from a 2-bit descriptor field (0-3) and was used directly to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the result. A corrupt or reserved descriptor value could index out of bounds or hit a NULL phy on parts with fewer bands. Reject invalid band indices, mirroring mt7996_rx_get_wcid().

References

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