# Linux Kernel 5.15.217

- Product: Linux Kernel (https://whatsnew.fyi/product/linux-kernel)
- Vendor: Linux Kernel Organization
- Date: 2026-08-23
- Version: 5.15.217
- Original notes: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.217
- Permalink: https://whatsnew.fyi/product/linux-kernel/releases/5.15.217
- 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** — ring-buffer: Use current_context for safe per-CPU buffer swap
- **fixed** — jiffies: Cast to unsigned long in secs_to_jiffies() conversion
- **fixed** — drm/virtio: Unlock reservations on dma_resv_reserve_fences() error
- **fixed** — drm/vmwgfx: Reserve fence slots on buffer objects in cotables
- **fixed** — udmabuf: Ensure to perform cache synchronisation in begin_cpu_udmabuf()
- **fixed** — binfmt_misc: use exe_file_deny_write_access() for the interpreter clone
- **fixed** — net/x25: fix use-after-free of the socket by its timers
- **fixed** — net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
- **fixed** — af_packet: Don't send zero-byte data in tpacket_snd()
- **fixed** — ASoC: xilinx: formatter_pcm: pass aud_drv_data to irq handlers
- **fixed** — net: packet: fix wrong transport_header when sending VLAN-tagged frame
- **fixed** — netfilter: ipset: fix list type element drift bug
- **fixed** — netfilter: ipset: fix refcount race between list:set GC and swap
- **fixed** — crypto: ccm - Set rfc4309 maxauthsize from child
- **fixed** — net: smc: fix splice entry lifetime imbalance in smc_rx_splice
- **fixed** — net: atlantic: free stranded TX buffers on ring deinit
- **fixed** — net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
- **fixed** — mm/ptdump: always stabilise against page table freeing using init_mm
- **fixed** — sched/psi: Shut down rtpoll_timer in psi_cgroup_free()
- **fixed** — drm/amd/pm: fix torn gpu metrics reads

The 120 most recent commits in this release — the full changelog is longer:

- Linux 5.15.217
- ring-buffer: Use current_context for safe per-CPU buffer swap
- ring-buffer: Remove jump to out label in ring_buffer_swap_cpu()
- jiffies: Cast to unsigned long in secs_to_jiffies() conversion
- drm/virtio: Unlock reservations on dma_resv_reserve_fences() error
- drm/vmwgfx: Reserve fence slots on buffer objects in cotables
- udmabuf: Ensure to perform cache synchronisation in begin_cpu_udmabuf()
- binfmt_misc: use exe_file_deny_write_access() for the interpreter clone
- net/x25: fix use-after-free of the socket by its timers
- net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
- af_packet: Don't send zero-byte data in tpacket_snd().
- ASoC: xilinx: formatter_pcm: pass aud_drv_data to irq handlers
- net: packet: fix wrong transport_header when sending VLAN-tagged frame
- netfilter: ipset: fix list type element drift bug
- netfilter: flowtable: publish GC-visible tuple last
- netfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path
- netfilter: ipset: fix refcount race between list:set GC and swap
- crypto: ccm - Set rfc4309 maxauthsize from child
- arm64: tegra: Add EL2 virtual timer interrupt for Tegra194
- net: smc: fix splice entry lifetime imbalance in smc_rx_splice
- net/smc: rdma write inline if qp has sufficient inline space
- net: atlantic: free stranded TX buffers on ring deinit
- net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
- openvswitch: move key and ovs_cb update out of handle_fragments
- net: sched: use skb_ip_totlen and iph_totlen
- openvswitch: use skb_ip_totlen in conntrack
- net: add a couple of helpers for iph tot_len
- mm/ptdump: always stabilise against page table freeing using init_mm
- sched/psi: Shut down rtpoll_timer in psi_cgroup_free()
- drm/amd/pm: fix torn gpu metrics reads
- ice: wait for reset completion in ice_resume()
- jiffies: Define secs_to_jiffies()
- can: gs_usb: gs_usb_receive_bulk_callback(): resubmit URB on skb allocation failure
- i2c: iproc: reset bus after timeout if START_BUSY is stuck
- i2c: bcm-iproc: remove printout on handled timeouts
- i2c: imx: Fix slave registration race and error handling
- binfmt_misc: restore write access when removing an entry
- fs: don't block write during exec on pre-content watched files
- fsnotify: opt-in for permission events at file open time
- ice: fix memory leak in ice_lbtest_prepare_rings()
- ice: fix VF interrupts cleanup
- scsi: scsi_debug: Fix REPORT ZONES alloc_len underflow OOB write
- scsi: scsi_debug: Rename zone type constants
- scsi: sd: sd_zbc: Return early in sd_zbc_check_zoned_characteristics()
- scsi: sd: sd_zbc: Introduce struct zoned_disk_info
- scsi: sd: sd_zbc: Use logical blocks as unit when querying zones
- scsi: sd: sd_zbc: Improve source code documentation
- net: pktgen: fix proc entry use-after-free
- net: pktgen: fix code style (WARNING: Block comments)
- igc: remove napi_synchronize() in igc_down()
- wifi: libertas_tf: fix use-after-free in lbtf_free_adapter()
- ksmbd: reject repeated SMB2 NEGOTIATE requests
- ksmbd: conn lock to serialize smb2 negotiate
- mm/vmstat: fold stranded per-cpu node stats when a node comes online
- ksmbd: validate minimum PDU size for transform requests
- smb/server: fix minimum SMB2 PDU size
- smb/server: fix minimum SMB1 PDU size
- ksmbd: rename smb2_get_msg to smb_get_msg
- super: fix emergency thaw deadlock on frozen block devices
- ftrace: Add global mutex to serialize trace_parser access
- net/sched: serialize qdisc_rtab_list against concurrent get/put
- ksmbd: defer destroy_previous_session() until after NTLM authentication
- libceph: fix two unsafe bare decodes in decode_lockers()
- ceph: fix hanging __ceph_get_caps() with stale mds_wanted
- ceph: print cluster fsid and client global_id in all debug logs
- ceph: rename _to_client() to _to_fs_client()
- libceph: add doutc and *_client debug macros support
- libceph: bound pg_

_[Truncated at 4000 characters — full notes: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.217]_