# Linux Kernel 6.6.154

- Product: Linux Kernel (https://whatsnew.fyi/product/linux-kernel)
- Vendor: Linux Kernel Organization
- Date: 2026-08-27
- Version: 6.6.154
- Original notes: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.154
- Permalink: https://whatsnew.fyi/product/linux-kernel/releases/6.6.154
- Labels: longterm

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — net: gro: properly validate BIG TCP aggregation criteria
- **fixed** — Bluetooth: hci_event: validate LE Set CIG Parameters response
- **fixed** — Bluetooth: hci_event: fix LE list UAF on reset
- **fixed** — HID: hyperv: validate initial device info bounds
- **fixed** — HID: sensor: custom: Fix use-after-free in enable_sensor
- **fixed** — HID: core: fix number/pointer type confusion on long items
- **fixed** — HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()
- **fixed** — mptcp: pm: fix memory leak from alloc-during-teardown race
- **fixed** — Input: atkbd - skip deactivate for HONOR ZQC-P
- **fixed** — Input: atkbd - skip deactivate for HONOR FMB-P's internal keyboard
- **fixed** — Bluetooth: hci_sync: Fix advertising data UAFs
- **fixed** — xfrm: fix sk_dst_cache double-free in xfrm_user_policy()
- **fixed** — HID: core: fix OOB read of field->usage in hid_set_field()
- **fixed** — HID: magicmouse: Prevent out-of-bounds (OOB) read during DOUBLE_REPORT_ID
- **fixed** — HID: magicmouse: do not keep a stale msc->input if no input is claimed
- **fixed** — HID: magicmouse: fix battery reporting for Bluetooth Magic Trackpad USB-C
- **fixed** — mptcp: pm: fix data race in add_addr timer callback
- **fixed** — ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses
- **fixed** — ipv6: fix use-after-free in ip6_finish_output2()
- **fixed** — ipv4: reject undersized MTUs in ip_do_fragment()

79 commits in this release:

- Linux 6.6.154
- net: gro: properly validate BIG TCP aggregation criteria
- Bluetooth: hci_event: validate LE Set CIG Parameters response
- Bluetooth: hci_event: fix LE list UAF on reset
- HID: hyperv: validate initial device info bounds
- HID: sensor: custom: Fix use-after-free in enable_sensor
- HID: core: fix number/pointer type confusion on long items
- HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()
- mptcp: pm: fix memory leak from alloc-during-teardown race
- Input: atkbd - skip deactivate for HONOR ZQC-P
- Input: atkbd - skip deactivate for HONOR FMB-P's internal keyboard
- Bluetooth: hci_sync: Fix advertising data UAFs
- xfrm: fix sk_dst_cache double-free in xfrm_user_policy()
- HID: core: fix OOB read of field->usage in hid_set_field()
- HID: magicmouse: Prevent out-of-bounds (OOB) read during DOUBLE_REPORT_ID
- HID: magicmouse: do not keep a stale msc->input if no input is claimed
- HID: magicmouse: fix battery reporting for Bluetooth Magic Trackpad USB-C
- mptcp: pm: fix data race in add_addr timer callback
- ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses
- ASoC: SOF: ipc4-pcm: Continue the pipeline trigger in case of IPC timeout
- ASoC: SOF: pcm: Add snd_sof_pcm specific wrappers for dev_dbg() and dev_err()
- ASoC: SOF: pcm: Move period/buffer configuration print after platform open
- ASoC: SOF: Relocate and rework functionality for PCM stream freeing
- ASoC: sof: pcm: use snd_pcm_direction_name()
- nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations
- nvmet-fc: fix invalid free in LS IOD error path
- nvmet-auth: zero the AUTH_RECEIVE response buffer
- ipv6: fix use-after-free in ip6_finish_output2()
- ipv4: reject undersized MTUs in ip_do_fragment()
- libceph: fix OOB read in decode_watchers() via missing bounds check
- Input: byd - synchronize timer deletion before freeing private data
- ndisc: ndisc_send_redirect() cleanup
- nfc: nci: free destination parameters when closing a connection
- nfc: nci: fix uninit-value in the RF discover/activated NTF handlers
- nfc: nci: fix out-of-bounds write in nci_target_auto_activated()
- nfc: st21nfca: validate ATR_REQ length against the received frame
- nfc: pn533: purge fragmented skbs during cleanup
- nfc: llcp: reject PDUs shorter than the LLCP header
- nfc: llcp: fix OOB read and u8 offset wrap in TLV parsers
- nfc: llcp: bound the connect_sn TLV walk to the skb
- nfc: microread: validate target discovery payload lengths
- nfc: fdp: bound the device-reported read length and fix an skb leak
- nfc: digital: clamp SENSF_RES length to the destination buffer
- drm/amdgpu: check ASPM on the dGPU host link
- drm/amd/display: fix BT.2020 YCbCr limited output CSC matrix
- drm/amd/display: Fix BT2020 YCbCr limited/full range input
- drm/amd/amdgpu: disable ASPM in some situations
- s390/vfio_ccw: Implement a crw lock
- s390/vfio_ccw: Calculate idal length based on idaw type
- s390/vfio_ccw: Ensure first IDAW remains constant
- s390/vfio_ccw: Free all memory if cp_init() fails
- gpio: ml-ioh: use raw_spinlock_t for the register lock
- xfs: validate attr entry pointer before field access
- ext4: clear error before retrying inode xattr space fallback
- ext4: stop retrying saturated xattr cache entries
- kcov: fix data corruption and race conditions on PREEMPT_RT
- null_blk: fix UBSAN shift-out-of-bounds when zone_size is 0 or overflows
- ocfs2: fix missing metadata reservation for large xattrs
- ALSA: dummy: Check card index validity at probe
- xfs: bounds-check buffer log item's dirty bitmap
- xfs: don't use a xfs_log_iovec for ri_buf in log recovery
- inet: frags: publish queues before arming timer
- inet: frags: save a pair of atomic operations in reassembly
- inet: frags: change inet_frag_kill() to defer refcount updates
- ipv4: frags: remove ipq_put()
- inet: frags: add inet_frag_putn() helper
- serial: sc16is7xx: enable THRI before filling TX FIFO
- serial: sc16is7xx: use guards for simple mutex l

_[Truncated at 4000 characters — full notes: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.154]_