In the Linux kernel, the following vulnerability has been resolved: i40e: remove read access to debugfs files The 'command' and 'netdev_ops' debugfs files are a legacy debugging interface supported by the i40e driver since its early days by commit 02e9c290814c ("i40e: debugfs interface"). Both of these debugfs files provide a read handler which is mostly useless, and which is implemented with questionable logic. They both use a static 256 byte buffer which is initialized to the empty string. In the case of the 'command' file this buffer is literally never used and simply wastes space. In the case of the 'netdev_ops' file, the last command written is saved here. On read, the files contents are presented as the name of the device followed by a colon and then the contents of their respective static buffer. For 'command' this will always be "<device>: ". For 'netdev_ops', this will be "<device>: <last command written>". But note the buffer is shared between all devices operated by this module. At best, it is mostly meaningless information, and at worse it could be accessed simultaneously as there doesn't appear to be any locking mechanism. We have also recently received multiple reports for both read functions about their use of snprintf and potential overflow that could result in reading arbitrary kernel memory. For the 'command' file, this is definitely impossible, since the static buffer is always zero and never written to. For the 'netdev_ops' file, it does appear to be possible, if the user carefully crafts the command input, it will be copied into the buffer, which could be large enough to cause snprintf to truncate, which then causes the copy_to_user to read beyond the length of the buffer allocated by kzalloc. A minimal fix would be to replace snprintf() with scnprintf() which would cap the return to the number of bytes written, preventing an overflow. A more involved fix would be to drop the mostly useless static buffers, saving 512 bytes and modifying the read functions to stop needing those as input. Instead, lets just completely drop the read access to these files. These are debug interfaces exposed as part of debugfs, and I don't believe that dropping read access will break any script, as the provided output is pretty useless. You can find the netdev name through other more standard interfaces, and the 'netdev_ops' interface can easily result in garbage if you issue simultaneous writes to multiple devices at once. In order to properly remove the i40e_dbg_netdev_ops_buf, we need to refactor its write function to avoid using the static buffer. Instead, use the same logic as the i40e_dbg_command_write, with an allocated buffer. Update the code to use this instead of the static buffer, and ensure we free the buffer on exit. This fixes simultaneous writes to 'netdev_ops' on multiple devices, and allows us to remove the now unused static buffer along with removing the read access.

The remote Oracle Linux 10 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-25754 advisory.

    [6.12.0-105.51.5]
    - RDMA/mlx5: Fix vport loopback forcing for MPV device (Patrisious Haddad)  [Orabug: 38226124]
    - arm64: Utilize for_each_cpu_wrap for reference lookup (Beata Michalska)  [Orabug: 38454705]
    - arm64: Update AMU-based freq scale factor on entering idle (Beata Michalska)  [Orabug: 38454705]
    - arm64: Provide an AMU-based version of arch_freq_get_on_cpu (Beata Michalska)  [Orabug: 38454705]
    - cpufreq: Introduce an optional cpuinfo_avg_freq sysfs entry (Beata Michalska)  [Orabug: 38454705]
    - cpufreq: Allow arch_freq_get_on_cpu to return an error (Beata Michalska)  [Orabug: 38454705]
    - arch_topology: init capacity_freq_ref to 0 (Ionela Voinescu)  [Orabug: 38454705]
    - ACPI/HMAT: Move HMAT messages to pr_debug() (Dan Williams)  [Orabug: 38454705]
    - perf: arm_cspmu: nvidia: monitor all ports by default (Besar Wicaksono)  [Orabug: 38454705]
    - perf: arm_cspmu: nvidia: enable NVLINK-C2C port filtering (Besar Wicaksono)  [Orabug: 38454705]
    - perf: arm_cspmu: nvidia: fix sysfs path in the kernel doc (Besar Wicaksono)  [Orabug: 38454705]
    - perf: arm_cspmu: nvidia: remove unsupported SCF events (Besar Wicaksono)  [Orabug: 38454705]
    - cppc_cpufreq: Remove HiSilicon CPPC workaround (Jie Zhan)  [Orabug: 38454705]
    - Revert 'sched/fair: Bump sd->max_newidle_lb_cost when newidle balance fails' (Joseph Salisbury)     [Orabug: 38498945]
    - uek-rpm/config-aarch64: Enable configs for Grace platform support (Vijay Kumar)  [Orabug: 38526374]
    - LTS version: v6.12.51 (Jack Vogel)
    - ASoC: qcom: audioreach: fix potential null pointer dereference (Srinivas Kandagatla)
    - wifi: ath11k: fix NULL dereference in ath11k_qmi_m3_load() (Matvey Kovalev)
    - mm: swap: check for stable address space before operating on the VMA (Charan Teja Kalla)
    - media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID (Thadeu Lima de Souza Cascardo)
    - media: rc: fix races with imon_disconnect() (Larshin Sergey)
    - media: tuner: xc5000: Fix use-after-free in xc5000_release (Duoming Zhou)
    - media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove (Duoming Zhou)
    - scsi: target: target_core_configfs: Add length check to avoid buffer overflow (Wang Haoran)
    - gcc-plugins: Remove TODO_verify_il for GCC >= 16 (Kees Cook)
    - crypto: sha256 - fix crash at kexec (Breno Leitao)
    - LTS version v6.12.50 (Jack Vogel)
    - drm/i915/backlight: Return immediately when scale() finds invalid parameters (Guenter Roeck)
    - Revert 'usb: xhci: remove option to change a default ring's TRB cycle bit' (Niklas Neronin)
    - iommufd: Fix race during abort for file descriptors (Jason Gunthorpe)
    - fbcon: Fix OOB access in font allocation (Thomas Zimmermann)
    - fbcon: fix integer overflow in fbcon_do_set_font (Samasth Norway Ananda)
    - mm/hugetlb: fix folio is still mapped when deleted (Jinjiang Tu)
    - kmsan: fix out-of-bounds access to shadow memory (Eric Biggers)
    - gpiolib: Extend software-node support to support secondary software-nodes (Hans de Goede)
    - fs/proc/task_mmu: check p->vec_buf for NULL (Jakub Acs)
    - afs: Fix potential null pointer dereference in afs_put_server (Zhen Ni)
    - drm/ast: Use msleep instead of mdelay for edid read (Nirmoy Das)
    - arm64: dts: marvell: cn9132-clearfog: fix multi-lane pci x2 and x4 ports (Josua Mayer)
    - arm64: dts: marvell: cn9132-clearfog: disable eMMC high-speed modes (Josua Mayer)
    - ARM: dts: socfpga: sodia: Fix mdio bus probe and PHY address (Nobuhiro Iwamatsu)
    - tracing: dynevent: Add a missing lockdown check on dynevent (Masami Hiramatsu (Google))
    - crypto: af_alg - Fix incorrect boolean values in af_alg_ctx (Eric Biggers)
    - i40e: improve VF MAC filters accounting (Lukasz Czapnik)
    - i40e: add mask to apply valid bits for itr_idx (Lukasz Czapnik)
    - i40e: add max boundary check for VF filters (Lukasz Czapnik)
    - i40e: fix validation of VF state in get resources (Lukasz Czapnik)
    - i40e: fix input validation logic for action_meta (Lukasz Czapnik)
    - i40e: fix idx validation in config queues msg (Lukasz Czapnik)
    - i40e: fix idx validation in i40e_validate_queue_map (Lukasz Czapnik)
    - i40e: add validation for ring_len param (Lukasz Czapnik)
    - HID: asus: add support for missing PX series fn keys (Amit Chaudhari)
    - smb: client: fix wrong index reference in smb2_compound_op() (Sang-Heon Jeon)
    - platform/x86: lg-laptop: Fix WMAB call in fan_mode_store() (Daniel Lee)
    - drm/panthor: Defer scheduler entitiy destruction to queue release (Adrian Larumbe)
    - futex: Prevent use-after-free during requeue-PI (Sebastian Andrzej Siewior)
    - drm/gma500: Fix null dereference in hdmi teardown (Zabelin Nikita)
    - mm: folio_may_be_lru_cached() unless folio_test_large() (Hugh Dickins)
    - mm: revert 'mm/gup: clear the LRU flag of a page before adding to LRU batch' (Hugh Dickins)
    - mm/gup: local lru_add_drain() to avoid lru_add_drain_all() (Hugh Dickins)
    - octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() (Dan Carpenter)
    - net: dsa: lantiq_gswip: suppress -EINVAL errors for bridge FDB entries added to the CPU port (Vladimir     Oltean)
    - net: dsa: lantiq_gswip: move gswip_add_single_port_br() call to port_setup() (Vladimir Oltean)
    - selftests: fib_nexthops: Fix creation of non-FDB nexthops (Ido Schimmel)
    - nexthop: Forbid FDB status change while nexthop is in a group (Ido Schimmel)
    - net: allow alloc_skb_with_frags() to use MAX_SKB_FRAGS (Jason Baron)
    - bnxt_en: correct offset handling for IPv6 destination address (Alok Tiwari)
    - vhost: Take a reference on the task in struct vhost_task. (Sebastian Andrzej Siewior)
    - Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync (Luiz Augusto von Dentz)
    - Bluetooth: hci_sync: Fix hci_resume_advertising_sync (Luiz Augusto von Dentz)
    - ethernet: rvu-af: Remove slash from the driver name (Petr Malat)
    - net/smc: fix warning in smc_rx_splice() when calling get_page() (Sidraya Jayagond)
    - net: tun: Update napi->skb after XDP process (Wang Liang)
    - can: peak_usb: fix shift-out-of-bounds issue (Stephane Grosjean)
    - can: mcba_usb: populate ndo_change_mtu() to prevent buffer overflow (Vincent Mailhol)
    - can: sun4i_can: populate ndo_change_mtu() to prevent buffer overflow (Vincent Mailhol)
    - can: hi311x: populate ndo_change_mtu() to prevent buffer overflow (Vincent Mailhol)
    - can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow (Vincent Mailhol)
    - xfrm: xfrm_alloc_spi shouldn't use 0 as SPI (Sabrina Dubroca)
    - bpf: Reject bpf_timer for PREEMPT_RT (Leon Hwang)
    - can: rcar_can: rcar_can_resume(): fix s2ram with PSCI (Geert Uytterhoeven)
    - wifi: virt_wifi: Fix page fault on connect (James Guan)
    - btrfs: don't allow adding block device of less than 1 MB (Mark Harmstone)
    - bpf: Check the helper function is valid in get_helper_proto (Jiri Olsa)
    - smb: server: use disable_work_sync in transport_rdma.c (Stefan Metzmacher)
    - smb: server: don't use delayed_work for post_recv_credits_work (Stefan Metzmacher)
    - cpufreq: Initialize cpufreq-based invariance before subsys (Christian Loehle)
    - ARM: dts: kirkwood: Fix sound DAI cells for OpenRD clients (Jihed Chaibi)
    - arm64: dts: imx8mp: Correct thermal sensor index (Peng Fan)
    - firmware: imx: Add stub functions for SCMI MISC API (Peng Fan)
    - HID: amd_sfh: Add sync across amd sfh work functions (Basavaraj Natikar)
    - IB/mlx5: Fix obj_type mismatch for SRQ event subscriptions (Or Har-Toov)
    - net: sfp: add quirk for FLYPRO copper SFP+ module (Aleksander Jan Bajkowski)
    - ALSA: usb-audio: Add mute TLV for playback volumes on more devices (qaqland)
    - ALSA: usb-audio: move mixer_quirks' min_mute into common quirk (Cryolitia PukNgae)
    - ALSA: usb-audio: Add DSD support for Comtrue USB Audio device (noble.yang)
    - i2c: designware: Add quirk for Intel Xe (Heikki Krogerus)
    - mmc: sdhci-cadence: add Mobileye eyeQ support (Benoit Monin)
    - net: sfp: add quirk for Potron SFP+ XGSPON ONU Stick (Chris Morgan)
    - net: fec: rename struct fec_devinfo fec_imx6x_info -> fec_imx6sx_info (Marc Kleine-Budde)
    - usb: core: Add 0x prefix to quirks debug output (Jiayi Li)
    - ALSA: usb-audio: Fix build with CONFIG_INPUT=n (Takashi Iwai)
    - ALSA: hda/realtek: Add support for ASUS NUC using CS35L41 HDA (Stefan Binding)
    - ALSA: usb-audio: Convert comma to semicolon (Chen Ni)
    - ALSA: usb-audio: Add mixer quirk for Sony DualSense PS5 (Cristian Ciocaltea)
    - ALSA: usb-audio: Remove unneeded wmb() in mixer_quirks (Cristian Ciocaltea)
    - ALSA: usb-audio: Simplify NULL comparison in mixer_quirks (Cristian Ciocaltea)
    - ALSA: usb-audio: Avoid multiple assignments in mixer_quirks (Cristian Ciocaltea)
    - ALSA: usb-audio: Drop unnecessary parentheses in mixer_quirks (Cristian Ciocaltea)
    - ALSA: usb-audio: Fix block comments in mixer_quirks (Cristian Ciocaltea)
    - ALSA: usb-audio: Fix code alignment in mixer_quirks (Cristian Ciocaltea)
    - firewire: core: fix overlooked update of subsystem ABI version (Takashi Sakamoto)
    - scsi: ufs: mcq: Fix memory allocation checks for SQE and CQE (Alok Tiwari)

    [6.12.0-105.49.4]
    - fs/dax: don't disassociate zero page entries (Alistair Popple)  [Orabug: 36859857]
    - device/dax: properly refcount device dax pages when mapping (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: properly refcount fs dax pages (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: Fix 'don't skip locked entries when scanning entries' (Alistair Popple)  [Orabug: 36859857]
    - mm: decline to manipulate the refcount on a slab page (Matthew Wilcox (Oracle))  [Orabug: 36859857]
    - dcssblk: mark DAX broken, remove FS_DAX_LIMITED support (Dan Williams)  [Orabug: 36859857]
    - mm/gup: don't allow FOLL_LONGTERM pinning of FS DAX pages (Alistair Popple)  [Orabug: 36859857]
    - mm/huge_memory: add vmf_insert_folio_pmd() (Alistair Popple)  [Orabug: 36859857]
    - mm/huge_memory: add vmf_insert_folio_pud() (Alistair Popple)  [Orabug: 36859857]
    - mm/rmap: add support for PUD sized mappings to rmap (Alistair Popple)  [Orabug: 36859857]
    - mm/memory: add vmf_insert_page_mkwrite() (Alistair Popple)  [Orabug: 36859857]
    - mm/memory: enhance insert_page_into_pte_locked() to create writable mappings (Alistair Popple)  [Orabug:
    36859857]
    - mm: allow compound zone device pages (Alistair Popple)  [Orabug: 36859857]
    - mm/mm_init: move p2pdma page refcount initialisation to p2pdma (Alistair Popple)  [Orabug: 36859857]
    - mm/gup: remove redundant check for PCI P2PDMA page (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: remove PAGE_MAPPING_DAX_SHARED mapping flag (Alistair Popple)  [Orabug: 36859857]
    - dax: use folios more widely within DAX (Matthew Wilcox (Oracle))  [Orabug: 36859857]
    - dax: remove access to page->index (Matthew Wilcox (Oracle))  [Orabug: 36859857]
    - fs/dax: ensure all pages are idle prior to filesystem unmount (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: always remove DAX page-cache entries when breaking layouts (Alistair Popple)  [Orabug: 36859857]
    - mm: optimize invalidation of shadow entries (Shakeel Butt)  [Orabug: 36859857]
    - mm: optimize truncation of shadow entries (Shakeel Butt)  [Orabug: 36859857]
    - fs/dax: create a common implementation to break DAX layouts (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: refactor wait for dax idle page (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: don't skip locked entries when scanning entries (Alistair Popple)  [Orabug: 36859857]
    - fs/dax: return unmapped busy pages from dax_layout_busy_page_range() (Alistair Popple)  [Orabug:
    36859857]
    - uek: kabi: Update check-kabi to support namespace checks (Saeed Mirzamohammadi)  [Orabug: 38459242]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the linux package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - i40e: remove read access to debugfs files The 'command' and 'netdev_ops' debugfs files are a legacy     debugging interface supported by the i40e driver since its early days by commit 02e9c290814c (i40e:
    debugfs interface). Both of these debugfs files provide a read handler which is mostly useless, and which     is implemented with questionable logic. They both use a static 256 byte buffer which is initialized to the     empty string. In the case of the 'command' file this buffer is literally never used and simply wastes     space. In the case of the 'netdev_ops' file, the last command written is saved here. On read, the files     contents are presented as the name of the device followed by a colon and then the contents of their     respective static buffer. For 'command' this will always be <device>: . For 'netdev_ops', this will be     <device>: <last command written>. But note the buffer is shared between all devices operated by this     module. At best, it is mostly meaningless information, and at worse it could be accessed simultaneously as     there doesn't appear to be any locking mechanism. We have also recently received multiple reports for both     read functions about their use of snprintf and potential overflow that could result in reading arbitrary     kernel memory. For the 'command' file, this is definitely impossible, since the static buffer is always     zero and never written to. For the 'netdev_ops' file, it does appear to be possible, if the user carefully     crafts the command input, it will be copied into the buffer, which could be large enough to cause snprintf     to truncate, which then causes the copy_to_user to read beyond the length of the buffer allocated by     kzalloc. A minimal fix would be to replace snprintf() with scnprintf() which would cap the return to the     number of bytes written, preventing an overflow. A more involved fix would be to drop the mostly useless     static buffers, saving 512 bytes and modifying the read functions to stop needing those as input. Instead,     lets just completely drop the read access to these files. These are debug interfaces exposed as part of     debugfs, and I don't believe that dropping read access will break any script, as the provided output is     pretty useless. You can find the netdev name through other more standard interfaces, and the 'netdev_ops'     interface can easily result in garbage if you issue simultaneous writes to multiple devices at once. In     order to properly remove the i40e_dbg_netdev_ops_buf, we need to refactor its write function to avoid     using the static buffer. Instead, use the same logic as the i40e_dbg_command_write, with an allocated     buffer. Update the code to use this instead of the static buffer, and ensure we free the buffer on exit.
    This fixes simultaneous writes to 'netdev_ops' on multiple devices, and allows us to remove the now unused     static buffer along with removing the read access. (CVE-2025-39901)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
274584	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2025-25754)	Nessus	Oracle Linux Local Security Checks	high
272025	Photon OS 5.0: Linux PHSA-2025-5.0-0662	Nessus	PhotonOS Local Security Checks	high
269257	Linux Distros Unpatched Vulnerability : CVE-2025-39901	Nessus	Misc.	high

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