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Linux KernelOperating system · Linux

CVE-2026-46208

HIGH · 7.8 CVSS v3.1 Published 2026-05-28
Fix available
A fix is available. Upgrade to 6.6.140 / 6.12.90 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop tp_meter sessions during mesh teardown TP meter sessions remain linked on bat_priv->tp_list after the netlink request has already finished. When the mesh interface is removed, batadv_mesh_free() currently tears down the mesh without first draining these sessions. A running sender thread or a late incoming tp_meter packet can then keep processing against a mesh instance which is already shutting down. Synchronize tp_meter with the mesh lifetime by stopping all active sessions from batadv_mesh_free() and waiting for sender threads to exit before teardown continues.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 4.8, < 6.6.140>= 6.7, < 6.12.90>= 6.13, < 6.18.32>= 6.19, < 7.0.9= 7.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.6.140 / 6.12.90 / 6.18.32 or later
Fixed in 6.6.1406.12.906.18.32
Vendor patch git.kernel.org →
Recommended fix High confidence

6.6.140, 6.12.90, 6.18.32, or 7.0.9 (depending on which version line you are on)

  1. Identify the currently running Linux kernel version using `uname -r`
  2. Determine which affected version range your kernel falls into
  3. Upgrade to a kernel version that includes the fix: for 6.6.x line upgrade to >=6.6.140, for 6.7-6.12.x upgrade to >=6.12.90, for 6.13-6.18.x upgrade to >=6.18.32, for 6.19-7.0.x upgrade to >=7.0.9
  4. For production systems, prefer the latest stable release in your minor version line
  5. Reboot the system to load the new kernel
  6. Verify the fix by checking the kernel version and confirming batman-adv functionality
Caveat Upgrading kernel major versions may require rebuild of out-of-tree modules; ensure all kernel modules (especially batman-adv) are compatible with target kernel

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-46208 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data