CVE-2026-64515
Linux mac80211 defragmentation bug can corrupt kernel via crafted Wi‑Fi frames.
Is CVE-2026-64515 being exploited?
Not confirmed. CVE-2026-64515 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 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-64515?
CVE-2026-64515 is rated High with a CVSS score of 8.3. 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-2026-64515?
Yes. A fix has been recorded for CVE-2026-64515. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64515 affect?
CVE-2026-64515 affects Linux kernel (mac80211), Wi‑Fi enabled Linux servers/workstations, Embedded routers/IoT using mac80211. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64515?
Install latest Linux kernel security updates and reboot Wi‑Fi devices.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote heap overrun via crafted MLE frames causing kernel memory corruption, potential DoS and possible privilege escalation/RCE.
Patch when possible
- affected>= 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff and < 1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4
- affected>= 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff and < 55c479aae99b120489a432db9c717484e523dfd6
- affected>= 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff and < 722b3f86df80644463d29fe5451e30a617f74500
- affected>= 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff and < a74e893f30db64cdce0fc7a96d3baa417bcd55f5
- affected6.9
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.