CVE-2026-93802

wifi: rsi: validate beacon length before fixed buffer copy

State: Published
Severity: Not scored
Published: Sep 24, 2026
Updated: Oct 3, 2026
Reserved: Sep 18, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 795ba65f46fe44061f1195951c122cc8ec685d44Affected d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 66a964432b2758a4cf69962366e37581d6e70632Affected d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 7f99742c3c2801f8033d8b7a0a58254d7f24fb1eAffected d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before f08d7f3c916335a0e539f1c45c130615967fac47Affected d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 87710ad633ce4588aec88611d0d0745eb33a6991Affected d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 266f195d5a14eec6c482fd09fbc924584c3371a7Affected d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 8ecdeb8b8a33b22c597299043c0dcfce50beb9eaAffected
LinuxLinux	4.14Affected before 4.14Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 795ba65f46fe44061f1195951c122cc8ec685d44Affected
d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 66a964432b2758a4cf69962366e37581d6e70632Affected
d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 7f99742c3c2801f8033d8b7a0a58254d7f24fb1eAffected
d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before f08d7f3c916335a0e539f1c45c130615967fac47Affected
d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 87710ad633ce4588aec88611d0d0745eb33a6991Affected
d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 266f195d5a14eec6c482fd09fbc924584c3371a7Affected
d26a9559403c7c3ec3b430f5825bc22c3d40abdb to before 8ecdeb8b8a33b22c597299043c0dcfce50beb9eaAffected

LinuxLinux

4.14Affected
before 4.14Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2 and laterNot affected

References

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