What’s Vulnerable › Vulnerabilities

CVE-2026-98329: wifi: mac80211: don't allow injecting frames wider than the chanctx

• 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: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: don't allow injecting frames wider than the chanctx Frames injected on a monitor interface can carry a radiotap field requesting a bandwidth, which mac80211 passes down to the driver regardless of the the actual operational bandwidth. If the bandwidth requested is too wide, that triggers a warning in hwsim: WARN_ON(hwsim_get_chanwidth(bw) > hwsim_get_chanwidth(confbw)) Drop such frames entirely instead since they cannot be sent.

Affected products

• Linux kernel: 4.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/73f48f7e16cadfc74f444ccd10c1d3ae253e2e27
• https://git.kernel.org/stable/c/a5c715eda066cba5ce3372759188ba8636dca629
• https://git.kernel.org/stable/c/c69718519a81e87284494d0c6e6eb7bdd834707a
• https://git.kernel.org/stable/c/e14bf37bb2b3853012ff160131d1c6233f7a9cc9

Get alerted when CVE-2026-98329 or the next vulnerability affects your stack