CVE-2026-64117
Linux mac80211 use‑after‑free via crafted Wi‑Fi mesh frames causing kernel crash or worse.
Is CVE-2026-64117 being exploited?
Not confirmed. CVE-2026-64117 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.23% probability of exploitation in the next 30 days.
How severe is CVE-2026-64117?
CVE-2026-64117 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-64117?
Yes. A fix has been recorded for CVE-2026-64117. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64117 affect?
CVE-2026-64117 affects Linux kernel (mac80211), Mesh‑enabled Wi‑Fi routers/APs, Embedded Linux devices, Laptops running affected kernels. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64117?
Update Linux kernel to fixed release or disable mesh support until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker in radio range can send crafted mesh frames to trigger a kernel use‑after‑free leading to crash (DoS) and potential privilege escalation/arbitrary code.
Patch when possible
- affected>= 3468e1e0c639032a603450f0830ccabfa76f5806 and < 2fb64f94f9afb774f2fa0c7835727d7a67f89f07
- affected>= 3468e1e0c639032a603450f0830ccabfa76f5806 and < d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349
- affected6.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.