Medium 5.5Published Jul 19, 2026

CVE-2026-64090batman-adv: tt: avoid empty VLAN responses

Updated under an hour ago (Oct 26, 2026, 3:40 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: avoid empty VLAN responses The commit 16116dac2339 ("batman-adv: prevent TT request storms by not sending inconsistent TT TLVLs") added checks to the local (direct) TT response code. But the response can also be done indirectly by another node using the global TT state. To avoid such inconsistency states reported in the original fix, also avoid sending empty VLANs for replies from the global TT state.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jul 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	7ea7b4a142758deaf46c1af0ca9ceca6dd55138b builds before 1f467d9a095211d3f77e8ff1bee90e73ffe01c64; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before 9a02c8fc963ddeecb5d8788be0740c1869fc54b7; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before ea4f757641430bcc8322772e161453c4db5ecb64; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before 99f17d1cdb371cbd037975239b321f346d38f6d2; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before cfb30645280a2131e46cbd1b9a38cfd3ff893f12; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before b93ca6012712ecab2b551e120d7c95038d6a89e5; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before ab26e346322648f5c39de017d9723c9256284fce; from 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b before fa1bd704940b5bcbc32c0b28db9167405c8ee5e0	CNA record
linux linux_kernel linux:linux_kernel	from 3.13 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/1f467d9a095211d3f77e8ff1bee90e73ffe01c64	patch
https://git.kernel.org/stable/c/9a02c8fc963ddeecb5d8788be0740c1869fc54b7	patch
https://git.kernel.org/stable/c/ea4f757641430bcc8322772e161453c4db5ecb64	patch
https://git.kernel.org/stable/c/99f17d1cdb371cbd037975239b321f346d38f6d2	patch
https://git.kernel.org/stable/c/cfb30645280a2131e46cbd1b9a38cfd3ff893f12	patch
https://git.kernel.org/stable/c/b93ca6012712ecab2b551e120d7c95038d6a89e5	patch
https://git.kernel.org/stable/c/ab26e346322648f5c39de017d9723c9256284fce	patch
https://git.kernel.org/stable/c/fa1bd704940b5bcbc32c0b28db9167405c8ee5e0	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.