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DRAFT: Batman-adv 2026.2 released

July 1st, 2026: The B.A.T.M.A.N. team is excited to announce the release of the July 2026 update for batman-adv! Several bug fixes and code cleanups are included in this version.

Since the kernel module is always dependent on the specific Linux kernel it’s compiled against, providing precompiled binaries on our website is not feasible. As always, you can find the signed tarballs in the download section:

https://downloads.open-mesh.org/batman/releases/batman-adv-2026.2/

Thanks

Many thanks to everyone who contributed patches:

And a special thanks to those who supported us with valuable advice and thorough testing:

batman-adv

$ git describe origin/main
v2026.1-102-g385b248d
$ range=v2026.1..v2026.1-102-g385b248d
$ git shortlog --email --no-merges "${range}" 
$ git log --no-merges "${range}"|grep -e '\(Reported\|Tested\|Acked\|Reviewed-by\|Co-authored-by\)-by'|sed 's/.*:/*/'|sort|uniq

Jiexun Wang <wangjiexun2025@gmail.com> (3):
      batman-adv: reject new tp_meter sessions during teardown
      batman-adv: stop tp_meter sessions during mesh teardown
      batman-adv: stop caching unowned originator pointers in BAT IV

Luxiao Xu <rakukuip@gmail.com> (1):
      batman-adv: fix tp_meter counter underflow during shutdown

Lyes Bourennani <lbourennani@fuzzinglabs.com> (1):
      batman-adv: fix integer overflow on buff_pos

Ruide Cao <caoruide123@gmail.com> (1):
      batman-adv: fix fragment reassembly length accounting

Ruijie Li <ruijieli51@gmail.com> (1):
      batman-adv: clear current gateway during teardown

Simon Wunderlich <sw@simonwunderlich.de> (1):
      batman-adv: Start new development cycle

Sven Eckelmann <sven@narfation.org> (79):
      batman-adv: Disable time compat for kernels with native support
      batman-adv: tp_meter: add missing completion header
      batman-adv: compat: use more flexible check_sub_overflow
      batman-adv: compat: drop misleading copyright holder info
      batman-adv: add missing includes
      batman-adv: tt: replace open-coded overflow check with helper
      batman-adv: Add b4 configuration with recommended settings
      MAINTAINERS: Rename batman-adv T(ree)
      batman-adv: b4: Define commit URL
      batman-adv: iv: avoid bonding logic for outgoing OGM
      batman-adv: tp_meter: fix tp_num leak on kmalloc failure
      batman-adv: bla: prevent use-after-free when deleting claims
      batman-adv: bla: only purge non-released claims
      batman-adv: bla: put backbone reference on failed claim hash insert
      batman-adv: tt: reject oversized local TVLV buffers
      batman-adv: tt: fix negative tt_buff_len
      batman-adv: tt: fix negative last_changeset_len
      batman-adv: tt: fix TOCTOU race for reported vlans
      batman-adv: tt: avoid empty VLAN responses
      batman-adv: tt: prevent TVLV entry number overflow
      batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown
      batman-adv: dat: handle forward allocation error
      batman-adv: tp_meter: avoid use of uninit sender vars
      batman-adv: frag: disallow unicast fragment in fragment
      batman-adv: tp_meter: directly shut down timer on cleanup
      batman-adv: use atomic_xchg() for gw.reselect check
      batman-adv: extract netdev wifi detection information object
      batman-adv: fix batadv_skb_is_frag() kernel-doc
      batman-adv: v: stop OGMv2 on disabled interface
      batman-adv: tvlv: abort OGM send on tvlv append failure
      batman-adv: tvlv: reject oversized TVLV packets
      batman-adv: tp_meter: fix race condition in send error reporting
      batman-adv: tp_meter: avoid role confusion in tp_list
      batman-adv: mcast: fix use-after-free in orig_node RCU release
      batman-adv: iv: recover OGM scheduling after forward packet error
      batman-adv: bla: fix report_work leak on backbone_gw purge
      batman-adv: bla: avoid double decrement of bla.num_requests
      batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface
      batman-adv: drop batman-adv specific version for in-tree module
      batman-adv: add missing includes
      batman-adv: replace non-atomic meshif config fields with (READ|WRITE)_ONCE
      batman-adv: replace non-atomic hardif config fields with (READ|WRITE)_ONCE
      batman-adv: replace non-atomic vlan config fields with (READ|WRITE)_ONCE
      batman-adv: replace non-atomic mesh state with (READ|WRITE)_ONCE
      batman-adv: replace non-atomic packet_size_max with (READ|WRITE)_ONCE
      batman-adv: replace non-atomic last_ttvn with (READ|WRITE)_ONCE
      batman-adv: tvlv: avoid unnecessary OGM buffer reallocations
      batman-adv: use neigh_node's orig_node only as id
      batman-adv: compat: disable k*alloc_obj for 6.18.33-6.19
      batman-adv: switch to upstream compatible version retrieval
      batman-adv: Keep packet_size_max as signed integer
      batman-adv: document batadv_wifi_net_devices_init return values
      batman-adv: tp_meter: keep unacked list in ascending ordered
      batman-adv: tp_meter: initialize dup_acks explicitly
      batman-adv: tp_meter: initialize dec_cwnd explicitly
      batman-adv: tp_meter: avoid window underflow
      batman-adv: tp_meter: avoid divide-by-zero for dec_cwnd
      batman-adv: tp_meter: fix fast recovery precondition
      batman-adv: tp_meter: handle seqno wrap-around for fast recovery detection
      batman-adv: tp_meter: add only finished tp_vars to lists
      batman-adv: tp_meter: split vars into sender and receiver types
      batman-adv: tp_meter: use locking for all congestion control variables
      batman-adv: tp_meter: consolidate congestion control variables
      batman-adv: bla: annotate lasttime access with READ/WRITE_ONCE
      batman-adv: prevent ELP transmission interval underflow
      batman-adv: tt: sync local and global tvlv preparation return values
      batman-adv: tt: directly retrieve wifi flags of net_device
      batman-adv: correct batadv_wifi_* kernel-doc
      batman-adv: document cleanup of batadv_wifi_net_devices entries
      batman-adv: drop duplicated wifi_flags assignments
      batman-adv: use GFP_KERNEL allocations for the wifi detection cache
      batman-adv: tp_meter: update stale kernel-doc after refactoring
      batman-adv: bla: update stale kernel-doc
      batman-adv: uapi: keep kernel-doc in struct member order
      batman-adv: fix batadv_v_ogm_packet_recv error handling kernel-doc
      batman-adv: fix kernel-doc typos and grammar errors
      batman-adv: convert cancellation of work items to disable helper
      batman-adv: tp_meter: initialize last_recv_time during init
      batman-adv: compat: provide placeholder for disable_.*work function

features
========

new kernel version
==================

coding style cleanup/refactoring
================================

various
=======

bugfixes
========

2026.2 (2026-07-01)
===================

* support latest kernels (5.10 - 7.2)
* coding style cleanups and refactoring
* bugs squashed:

  -

batctl

$ git describe origin/main
v2026.1-6-g8e67af3
$ range=v2026.1..v2026.1-6-g8e67af3
$ git shortlog --email --no-merges "${range}" 
$ git log --no-merges "${range}"|grep -e '\(Reported\|Tested\|Acked\|Reviewed-by\|Co-authored-by\)-by'|sed 's/.*:/*/'|sort|uniq

Simon Wunderlich <sw@simonwunderlich.de> (1):
      batctl: Start new development cycle

Sven Eckelmann <sven@narfation.org> (4):
      batctl: Add b4 configuration with recommended settings
      batctl: b4: Define commit URL
      batctl: don't stop on missing batman-adv version file
      batctl: keep kernel-doc in packet struct member order

features
========

coding style cleanup/refactoring
================================

bugfixes
========

2026.2 (2026-07-01)
===================

* coding style cleanups and refactoring
* bugs squashed:

  - tcpdump: Fix printing of usecs
  - fix tbl preprocessing of manpage

alfred

$ git describe origin/main
v2026.1-3-g88db36d
$ range=v2026.1..v2026.1-3-g88db36d
$ git shortlog --email --no-merges "${range}" 
$ git log --no-merges "${range}"|grep -e '\(Reported\|Tested\|Acked\|Reviewed-by\|Co-authored-by\)-by'|sed 's/.*:/*/'|sort|uniq

Simon Wunderlich <sw@simonwunderlich.de> (1):
      alfred: Start new development cycle

Sven Eckelmann <sven@narfation.org> (2):
      alfred: Add b4 configuration with recommended settings
      alfred: b4: Define commit URL

features
========

coding style cleanup/refactoring
================================

bugfixes
========

2026.2 (2026-07-01)
===================

* coding style cleanups and refactoring
* bugs squashed:

  -

Happy routing,

The B.A.T.M.A.N. team