CVE-2026-64090

batman-adv: tt: avoid empty VLAN responses

MEDIUM

5.5

CVSS Score

Published: July 19, 2026 at 03:39 PM UTC

Updated: August 11, 2026 at 03:48 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.13 ≤ v < 5.10.2593.13 ≤ v < 5.15.2103.13 ≤ v < 6.1.1763.13 ≤ v < 6.12.933.13 ≤ v < 6.18.343.13 ≤ v < 6.6.1433.13 ≤ v < 7.0.113.13 ≤ v < 7.15.11 ≤ v < 5.15.2105.16 ≤ v < 6.1.1766.13 ≤ v < 6.18.346.19 ≤ v < 7.0.116.2 ≤ v < 6.6.1436.7 ≤ v < 6.12.937.1 rc1 7.1 rc2 7.1 rc3 7.1 rc47ea7b4a142758deaf46c1af0ca9ceca6dd55138b

Vendor states this is fixed in 1f467d9a095211d3f77e8ff1bee90e73ffe01c64 (fixed)

Vendor states this is fixed in 99f17d1cdb371cbd037975239b321f346d38f6d2 (fixed)

Vendor states this is fixed in 9a02c8fc963ddeecb5d8788be0740c1869fc54b7 (fixed)

Vendor states this is fixed in ab26e346322648f5c39de017d9723c9256284fce (fixed)

Vendor states this is fixed in b93ca6012712ecab2b551e120d7c95038d6a89e5 (fixed)

Vendor states this is fixed in cfb30645280a2131e46cbd1b9a38cfd3ff893f12 (fixed)

Vendor states this is fixed in ea4f757641430bcc8322772e161453c4db5ecb64 (fixed)

Vendor states this is fixed in fa1bd704940b5bcbc32c0b28db9167405c8ee5e0 (fixed)

Vendor states this is fixed in 3.13 (unaffected)

Vendor states this is fixed in 5.10.259 (unaffected)

Vendor states this is fixed in 5.15.210 (unaffected)

Vendor states this is fixed in 6.1.176 (unaffected)