CVE-2026-90016

Status: UPDATED  |  Advisory ID: CVE-2026-90016

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()

rtw_restruct_wmm_ie() scans in_ie for a WMM IE with:

while (i < in_len) {

...

if (i + 5 < in_len && in_ie[i] == 0xDD && ...) {

...

break;

}

i += (in_ie[i + 1] + 2); /* to the next IE element */

}

When the "i + 5 < in_len" match check fails simply because i is

within 5 bytes of the end of the buffer (i.e. no WMM IE was found

near the tail of in_ie), execution falls through to

"i += (in_ie[i + 1] + 2)", which reads in_ie[i + 1]. If i == in_len

- 1 at that point, this is a 1-byte out-of-bounds read of an

attacker-influenced IE buffer built from association/scan data.

Commit a75281626fc8f ("staging: rtl8723bs: fix potential

out-of-bounds read in rtw_restruct_wmm_ie") added the "i + 5 <

in_len" guard to the match condition itself, but did not add an

equivalent guard before the fallthrough advance, so the same class

of OOB read remained reachable through the non-matching path.

Add an explicit bounds check before advancing to the next IE. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References