CVE-2026-90351: Linux kernel · wifi: mt76: mt7996: do not attach hif2 WED when the main WED attach failed
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d566387df8306257d2f703a0d99fd9896400317e : update Linux kernel when convenient.
Data as of 26 Oct 2026, 20:04 UTC
Rated Medium by Threat Radar's AI analysis · 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 d566387df8306257d2f703a0d99fd9896400317e, 76144da3c6184c7850631ad79d0600ac8bf7649a, 9d1fd637336588d8118c104a025eca1341d9ec85 +1
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.
What to do
Upgrade Linux kernel to d566387df8306257d2f703a0d99fd9896400317e, 76144da3c6184c7850631ad79d0600ac8bf7649a, 9d1fd637336588d8118c104a025eca1341d9ec85 or 7c1924332e986019c6bcddf55c843361cccac73f.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel. The vulnerability is resolved by skipping the hif2 WED setup when the primary WED device is not active. Users should update to a Linux kernel version that includes the fix identified by the commits d566387df8306257d2f703a0d99fd9896400317e, 76144da3c6184c7850631ad79d0600ac8bf7649a, 9d1fd637336588d8118c104a025eca1341d9ec85, or 7c1924332e986019c6bcddf55c843361cccac73f.
Description
A vulnerability in the Linux kernel's mt76 wireless driver for the mt7996 device was fixed by preventing the attachment of the hif2 WED for the secondary PCIe function when the main WED attach fails. Previously, if the primary WED attach failed, the secondary function's hif2 WED was still attached, causing an inconsistent device state that could lead to a crash. The fix skips the hif2 WED setup if the primary WED device is inactive.
References
- git.kernel.org/stable/c/9d1fd637336588d8118c104a025eca1341d9ec85 (opens in a new tab)
- git.kernel.org/stable/c/76144da3c6184c7850631ad79d0600ac8bf7649a (opens in a new tab)
- git.kernel.org/stable/c/d566387df8306257d2f703a0d99fd9896400317e (opens in a new tab)
- git.kernel.org/stable/c/7c1924332e986019c6bcddf55c843361cccac73f (opens in a new tab)