staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()
CVE-2026-90016 · published 16 Sept 2026
How serious is it
- Severity: high, CVSS score 7.1 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-90016?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 716850842d2f103f915fe7c857ff1a0a036491b4, 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < e63b72c5d7336981dfc05e5cb92becff29dfea00, 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 4420cc71841b50e31a7868ef7acb011c0e08d294, 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < fd19b8895f8a91087e8a62f1e27b128025dabb95
- Linux Linux: 4.12
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/716850842d2f103f915fe7c857ff1a0a036491b4
- git.kernel.org/stable/c/e63b72c5d7336981dfc05e5cb92becff29dfea00
- git.kernel.org/stable/c/4420cc71841b50e31a7868ef7acb011c0e08d294
- git.kernel.org/stable/c/fd19b8895f8a91087e8a62f1e27b128025dabb95
- git.kernel.org/stable/c/28a289beaf226b30b1e6e7d7b1a2946fe2d6e852
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON