In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt76x02: do not WARN on invalid rx descriptor length
The MPDU length in the rx descriptor comes from the hardware. In
monitor mode with the fcsfail filter enabled, the hardware passes up
corrupted frames, and a corrupted frame can report a length larger
than the received buffer. The bounds check correctly discards such
frames, but its WARN_ON_ONCE wrapper means any over-the-air garbage
frame taints the kernel, and panics it on the first such frame when
panic_on_warn is set.
Drop the WARN and discard the frame silently, matching what
commit c2d4c8723dbf ("mt76x2: remove some harmless WARN_ONs in tx
status and rx path") did for the neighboring rx and tx status paths.
Observed immediately on rx with an MT7612U in fcsfail monitor mode
on a busy channel.
wifi: mt76: mt76x02: do not WARN on invalid rx descriptor length
The MPDU length in the rx descriptor comes from the hardware. In
monitor mode with the fcsfail filter enabled, the hardware passes up
corrupted frames, and a corrupted frame can report a length larger
than the received buffer. The bounds check correctly discards such
frames, but its WARN_ON_ONCE wrapper means any over-the-air garbage
frame taints the kernel, and panics it on the first such frame when
panic_on_warn is set.
Drop the WARN and discard the frame silently, matching what
commit c2d4c8723dbf ("mt76x2: remove some harmless WARN_ONs in tx
status and rx path") did for the neighboring rx and tx status paths.
Observed immediately on rx with an MT7612U in fcsfail monitor mode
on a busy channel.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 17 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt76x02: do not WARN on invalid rx descriptor length The MPDU length in the rx descriptor comes from the hardware. In monitor mode with the fcsfail filter enabled, the hardware passes up corrupted frames, and a corrupted frame can report a length larger than the received buffer. The bounds check correctly discards such frames, but its WARN_ON_ONCE wrapper means any over-the-air garbage frame taints the kernel, and panics it on the first such frame when panic_on_warn is set. Drop the WARN and discard the frame silently, matching what commit c2d4c8723dbf ("mt76x2: remove some harmless WARN_ONs in tx status and rx path") did for the neighboring rx and tx status paths. Observed immediately on rx with an MT7612U in fcsfail monitor mode on a busy channel. | |
| Title | wifi: mt76: mt76x02: do not WARN on invalid rx descriptor length | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-17T16:09:19.247Z
Reserved: 2026-09-11T19:38:34.809Z
Link: CVE-2026-90382
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-17T17:17:37.503
Modified: 2026-09-17T17:17:37.503
Link: CVE-2026-90382
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.