wifi: mac80211: validate extension-frame layout before RX
CVE-2026-68470 · published 15 Aug 2026
How serious is it
- Severity: high, CVSS score 8.8 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-2026-68470?
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: 09a740ce352e1a1d16b9984115514ba9a4f4704b to < 7aba69b611007e11b9b93118ff8fe88998c3107f, 09a740ce352e1a1d16b9984115514ba9a4f4704b to < 1c3d9c6bd5b795f3b952b40d574c8e424e14a39b, 09a740ce352e1a1d16b9984115514ba9a4f4704b to < 625fc704b19cb48d7d269ad54ffffb4d3bf9c7ed, 09a740ce352e1a1d16b9984115514ba9a4f4704b to < 57d503ce32eccfa7650065ca4c560f7e29a2e676
- Linux Linux: 5.10
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:
wifi: mac80211: validate extension-frame layout before RX
Extension frames only have the extension header at the regular 802.11
header offset. The generic RX path can still reach helpers and interface
dispatch code that read regular header address fields before unsupported
extension subtypes are dropped.
mac80211 currently only handles S1G beacon extension frames. Drop other
extension subtypes before they can reach regular-header RX processing.
For S1G beacons, linearize the SKB with the management-frame path and
require the fixed S1G beacon header, including optional fixed fields
indicated by frame control, before generic RX dispatch.
Route S1G beacons through the station/default-link RX path without
regular-header station lookup. Avoid regular-header address reads in the
mac80211 RX paths that process S1G extension beacons, including
accept-frame, duplicate-detection, address-copy, and MLO
address-translation paths.
Also make ieee80211_get_bssid() length-safe before returning the S1G
source-address pointer.
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/7aba69b611007e11b9b93118ff8fe88998c3107f
- git.kernel.org/stable/c/1c3d9c6bd5b795f3b952b40d574c8e424e14a39b
- git.kernel.org/stable/c/625fc704b19cb48d7d269ad54ffffb4d3bf9c7ed
- git.kernel.org/stable/c/57d503ce32eccfa7650065ca4c560f7e29a2e676
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON