What’s Vulnerable › Vulnerabilities

CVE-2026-90378: wifi: mt76: mt792x: Fix memory leak in SDIO TX path

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt792x: Fix memory leak in SDIO TX path When tx_prepare_skb() returns an error in the SDIO TX path, the skb is not freed, leading to a memory leak. This can occur when zero-length frames (such as WNM NULL frames) are dropped to prevent potential hardware TX hangs. Fix this by properly releasing the skb with ieee80211_tx_status_ext() when tx_prepare_skb() fails.

Affected products

• Linux kernel: 5.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6a342db7a6502bc6781579145e05d4d4731786ab
• https://git.kernel.org/stable/c/6a8000c76dc34490a2bb321ad1a5f882a2ccab7c
• https://git.kernel.org/stable/c/808f2767d4217a5b96f674288573b9b89d432eed
• https://git.kernel.org/stable/c/9ef1351209d42b7d96604f2a13d7ea8215a24e07
• https://git.kernel.org/stable/c/b64d196280aff8494ba6fb387e37b18479c99b83
• https://git.kernel.org/stable/c/c2c7f16f2c62f79f7c381e500afa7123580742a5
• https://git.kernel.org/stable/c/ddf6a17d8e3d0dbb841c13c10d7c1340a138a80d

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