CVE-2026-90369wifi: mt76: fix out-of-bounds access in mmio copy helpers
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: fix out-of-bounds access in mmio copy helpers mt76_mmio_write_copy() and mt76_mmio_read_copy() iterate up to ALIGN(len, 4), so a length that is not a multiple of four reads past the source buffer (write_copy) or writes past the destination (read_copy). Copy the aligned body in the loop and handle the remaining tail through a 4-byte bounce buffer, keeping the register access width unchanged.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 2df00805f7dbaa46b60c682aad0d76270b7ba266 before 6ed0fba58bb125a8d8de96e391aa86111166efca; from 2df00805f7dbaa46b60c682aad0d76270b7ba266 before 6689b4a65e88d7b019e687fa9d6943ca070f3e43 | CNA record |
References
- https://git.kernel.org/stable/c/6ed0fba58bb125a8d8de96e391aa86111166efca
- https://git.kernel.org/stable/c/6689b4a65e88d7b019e687fa9d6943ca070f3e43
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.