CVE-2026-63857
Linux airoha driver unsafe fragment read can trigger kernel crash/DoS
Is CVE-2026-63857 being exploited?
Not confirmed. CVE-2026-63857 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 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-63857?
CVE-2026-63857 is rated Critical with a CVSS score of 9.8. 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-2026-63857?
Yes. A fix has been recorded for CVE-2026-63857. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-63857 affect?
CVE-2026-63857 affects Linux kernel (airoha wireless driver), Devices with Airoha QDMA NICs, Embedded Linux using airoha driver. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-63857?
Apply upstream or vendor kernel/driver update and reboot affected systems
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted network traffic can trigger a kernel page fault in airoha_dev_xmit, causing host crash or denial of service.
Patch when possible
- affected>= 23020f04932701d5c8363e60756f12b43b8ed752 and < f670fa4b19ceddc6d215dda4997888ccba9bbc61
- affected>= 23020f04932701d5c8363e60756f12b43b8ed752 and < d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3
- affected>= 23020f04932701d5c8363e60756f12b43b8ed752 and < bde34e84edc8b5571fbde7e941e175a4293ee1eb
- affected6.11
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.