CVE-2026-64088
Linux batman-adv type confusion causes kernel memory leak in TT responses
Is CVE-2026-64088 being exploited?
Not confirmed. CVE-2026-64088 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 0.28% probability of exploitation in the next 30 days.
How severe is CVE-2026-64088?
CVE-2026-64088 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-2026-64088?
Yes. A fix has been recorded for CVE-2026-64088. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64088 affect?
CVE-2026-64088 affects Linux kernel (batman-adv module), Devices running batman-adv (mesh routers, embedded/IoT). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64088?
Update kernel to a version with the batman-adv fix or disable batman-adv until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Uninitialized kernel memory can be sent in mesh TT response packets, enabling remote information disclosure to other mesh nodes.
Patch when possible
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < 4c4c2f340f4c27373bfcac8dc5032ce7bb474e47
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < 33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < 3c96dff00998314983b68a3e7caac07a66ebe496
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < 32edd2a28e112064020a2f319a8cb8a9e5a09767
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < 4dab98961426d0cf6a1599cda6950b7596ca2fcd
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < 730de8733dd90f70d7580a9b329b971f8e1474a2
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < ed28ead3420c373a7928622f114bc6168075d1e1
- affected>= a73105b8d4c765d9ebfb664d0a66802127d8e4c7 and < b64963a2ceeb7529310b6cf253a1e540784422f4
- affected3.1
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.