What’s Vulnerable › Vulnerabilities

CVE-2026-93802: wifi: rsi: validate beacon length before fixed buffer copy

• 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: 2026-09-24 · updated 2026-10-03

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rsi: validate beacon length before fixed buffer copy rsi_prepare_beacon() copies the mac80211 beacon frame after FRAME_DESC_SZ into a management skb whose usable tailroom may be smaller than MAX_MGMT_PKT_SIZE after alignment. Validate the beacon length against the actual tailroom before the copy and skb_put(). Leave ownership of the management skb with the caller on error, matching the existing rsi_send_beacon() cleanup path.

Affected products

• Linux kernel: 4.14 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/266f195d5a14eec6c482fd09fbc924584c3371a7
• https://git.kernel.org/stable/c/66a964432b2758a4cf69962366e37581d6e70632
• https://git.kernel.org/stable/c/795ba65f46fe44061f1195951c122cc8ec685d44
• https://git.kernel.org/stable/c/7f99742c3c2801f8033d8b7a0a58254d7f24fb1e
• https://git.kernel.org/stable/c/87710ad633ce4588aec88611d0d0745eb33a6991
• https://git.kernel.org/stable/c/8ecdeb8b8a33b22c597299043c0dcfce50beb9ea
• https://git.kernel.org/stable/c/f08d7f3c916335a0e539f1c45c130615967fac47

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