CVE-2026-90378
Published Sep 17, 2026
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.
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References
Other 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
Frequently Asked Questions
What is CVE-2026-90378? +
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.
How do I check if I'm vulnerable to CVE-2026-90378? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.