In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: unshare page tables during VMA split, not before Currently, __split_vma() triggers hugetlb page table unsharing through vm_ops->may_split(). This happens before the VMA lock and rmap locks are taken - which is too early, it allows racing VMA-locked page faults in our process and racing rmap walks from other processes to cause page tables to be shared again before we actually perform the split. Fix it by explicitly calling into the hugetlb unshare logic from __split_vma() in the same place where THP splitting also happens. At that point, both the VMA and the rmap(s) are write-locked. An annoying detail is that we can now call into the helper hugetlb_unshare_pmds() from two different locking contexts: 1. from hugetlb_split(), holding: - mmap lock (exclusively) - VMA lock - file rmap lock (exclusively) 2. hugetlb_unshare_all_pmds(), which I think is designed to be able to call us with only the mmap lock held (in shared mode), but currently only runs while holding mmap lock (exclusively) and VMA lock Backporting note: This commit fixes a racy protection that was introduced in commit b30c14cd6102 ("hugetlb: unshare some PMDs when splitting VMAs"); that commit claimed to fix an issue introduced in 5.13, but it should actually also go all the way back. [jannh@google.com: v2]

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

  - mm/hugetlb: unshare page tables during VMA split, not before Currently, __split_vma() triggers hugetlb     page table unsharing through vm_ops->may_split(). This happens before the VMA lock and rmap locks are     taken - which is too early, it allows racing VMA-locked page faults in our process and racing rmap walks     from other processes to cause page tables to be shared again before we actually perform the split. Fix it     by explicitly calling into the hugetlb unshare logic from __split_vma() in the same place where THP     splitting also happens. At that point, both the VMA and the rmap(s) are write-locked. An annoying detail     is that we can now call into the helper hugetlb_unshare_pmds() from two different locking contexts: 1.
    from hugetlb_split(), holding: - mmap lock (exclusively) - VMA lock - file rmap lock (exclusively) 2.
    hugetlb_unshare_all_pmds(), which I think is designed to be able to call us with only the mmap lock held     (in shared mode), but currently only runs while holding mmap lock (exclusively) and VMA lock Backporting     note: This commit fixes a racy protection that was introduced in commit b30c14cd6102 (hugetlb: unshare     some PMDs when splitting VMAs); that commit claimed to fix an issue introduced in 5.13, but it should     actually also go all the way back. [jannh@google.com: v2] (CVE-2025-38084)

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1111 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails (CVE-2024-36913)

    In the Linux kernel, the following vulnerability has been resolved:

    xfs: don't walk off the end of a directory data block (CVE-2024-41013)

    In the Linux kernel, the following vulnerability has been resolved:

    mm: hugetlb: independent PMD page table shared count (CVE-2024-57883)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix kmemleak warning for percpu hashmap (CVE-2025-37807)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/huge_memory: fix dereferencing invalid pmd migration entry (CVE-2025-37958)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

    In the Linux kernel, the following vulnerability has been resolved:

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

    In the Linux kernel, the following vulnerability has been resolved:

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

    In the Linux kernel, the following vulnerability has been resolved:

    ACPI: CPPC: Fix NULL pointer dereference when nosmp is used (CVE-2025-38113)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

    In the Linux kernel, the following vulnerability has been resolved:

    net: fix udp gso skb_segment after pull from frag_list (CVE-2025-38124)

    In the Linux kernel, the following vulnerability has been resolved:

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

    In the Linux kernel, the following vulnerability has been resolved:

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf, sockmap: Avoid using sk_socket after free when sending (CVE-2025-38154)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: reject invalid perturb period (CVE-2025-38193)

    In the Linux kernel, the following vulnerability has been resolved:

    fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in fb_videomode_to_var (CVE-2025-38215)

    In the Linux kernel, the following vulnerability has been resolved:

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

    In the Linux kernel, the following vulnerability has been resolved:

    af_unix: Don't leave consecutive consumed OOB skbs. (CVE-2025-38236)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Avoid __bpf_prog_ret0_warn when jit fails (CVE-2025-38280)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

    In the Linux kernel, the following vulnerability has been resolved:

    ptp: remove ptp->n_vclocks check logic in ptp_vclock_in_use() (CVE-2025-38305)

    In the Linux kernel, the following vulnerability has been resolved:

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

    In the Linux kernel, the following vulnerability has been resolved:

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

The version of kernel installed on the remote host is prior to 5.10.239-236.958. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2025-098 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: flowtable: fix stuck flows on cleanup due to pending work (CVE-2022-50000)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_socket: fix sk refcount leaks (CVE-2024-46855)

    In the Linux kernel, the following vulnerability has been resolved:

    mm: hugetlb: independent PMD page table shared count (CVE-2024-57883)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: don't allow 1 packet limit (CVE-2024-57996)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/huge_memory: fix dereferencing invalid pmd migration entry (CVE-2025-37958)

    In the Linux kernel, the following vulnerability has been resolved:

    arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users (CVE-2025-37963)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

    In the Linux kernel, the following vulnerability has been resolved:

    net: ch9200: fix uninitialised access during mii_nway_restart (CVE-2025-38086)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/iopl: Cure TIF_IO_BITMAP inconsistencies (CVE-2025-38100)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: ets: fix a race in ets_qdisc_change() (CVE-2025-38107)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

    In the Linux kernel, the following vulnerability has been resolved:

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

    In the Linux kernel, the following vulnerability has been resolved:

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

    In the Linux kernel, the following vulnerability has been resolved:

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

    In the Linux kernel, the following vulnerability has been resolved:

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

    In the Linux kernel, the following vulnerability has been resolved:

    exfat: fix double free in delayed_free (CVE-2025-38206)

    In the Linux kernel, the following vulnerability has been resolved:

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

    In the Linux kernel, the following vulnerability has been resolved:

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

    In the Linux kernel, the following vulnerability has been resolved:

    arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth() (CVE-2025-38320)

    In the Linux kernel, the following vulnerability has been resolved:

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

Tenable has extracted the preceding description block directly from the tested product 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 version of kernel installed on the remote host is prior to 5.15.186-128.192. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2025-082 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    mm/khugepaged: fix ->anon_vma race (CVE-2023-52935)

    In the Linux kernel, the following vulnerability has been resolved:

    mm: hugetlb: independent PMD page table shared count (CVE-2024-57883)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: don't allow 1 packet limit (CVE-2024-57996)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/huge_memory: fix dereferencing invalid pmd migration entry (CVE-2025-37958)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/iopl: Cure TIF_IO_BITMAP inconsistencies (CVE-2025-38100)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: ets: fix a race in ets_qdisc_change() (CVE-2025-38107)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

    In the Linux kernel, the following vulnerability has been resolved:

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

    In the Linux kernel, the following vulnerability has been resolved:

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

    In the Linux kernel, the following vulnerability has been resolved:

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

    In the Linux kernel, the following vulnerability has been resolved:

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf, sockmap: Avoid using sk_socket after free when sending (CVE-2025-38154)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: reject invalid perturb period (CVE-2025-38193)

    In the Linux kernel, the following vulnerability has been resolved:

    exfat: fix double free in delayed_free (CVE-2025-38206)

    In the Linux kernel, the following vulnerability has been resolved:

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Avoid __bpf_prog_ret0_warn when jit fails (CVE-2025-38280)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

    In the Linux kernel, the following vulnerability has been resolved:

    ptp: remove ptp->n_vclocks check logic in ptp_vclock_in_use() (CVE-2025-38305)

    In the Linux kernel, the following vulnerability has been resolved:

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

    In the Linux kernel, the following vulnerability has been resolved:

    arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth() (CVE-2025-38320)

    In the Linux kernel, the following vulnerability has been resolved:

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1080 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    eth: bnxt: fix out-of-range access of vnic_info array (CVE-2025-22112)

    In the Linux kernel, the following vulnerability has been resolved:

    wifi: cfg80211: init wiphy_work before allocating rfkill fails (CVE-2025-22119)

    In the Linux kernel, the following vulnerability has been resolved:

    block: fix adding folio to bio (CVE-2025-22122)

    In the Linux kernel, the following vulnerability has been resolved:

    wifi: ath12k: Clear affinity hint before calling ath12k_pci_free_irq() in error path (CVE-2025-22128)

    In the Linux kernel, the following vulnerability has been resolved:

    cpufreq/amd-pstate: Add missing NULL ptr check in amd_pstate_update (CVE-2025-23137)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: hfsc: Address reentrant enqueue adding class to eltree twice (CVE-2025-38001)

    In the Linux kernel, the following vulnerability has been resolved:

    gpio: virtuser: fix potential out-of-bound write (CVE-2025-38082)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

    In the Linux kernel, the following vulnerability has been resolved:

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

    In the Linux kernel, the following vulnerability has been resolved:

    sunrpc: handle SVC_GARBAGE during svc auth processing as auth error (CVE-2025-38089)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/iopl: Cure TIF_IO_BITMAP inconsistencies (CVE-2025-38100)

    In the Linux kernel, the following vulnerability has been resolved:

    io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo() (CVE-2025-38106)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: ets: fix a race in ets_qdisc_change() (CVE-2025-38107)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

    In the Linux kernel, the following vulnerability has been resolved:

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

    In the Linux kernel, the following vulnerability has been resolved:

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

    In the Linux kernel, the following vulnerability has been resolved:

    ACPI: CPPC: Fix NULL pointer dereference when nosmp is used (CVE-2025-38113)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

    In the Linux kernel, the following vulnerability has been resolved:

    net: fix udp gso skb_segment after pull from frag_list (CVE-2025-38124)

    In the Linux kernel, the following vulnerability has been resolved:

    page_pool: Fix use-after-free in page_pool_recycle_in_ring (CVE-2025-38129)

    In the Linux kernel, the following vulnerability has been resolved:

    usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink() (CVE-2025-38134)

    In the Linux kernel, the following vulnerability has been resolved:

    dm: fix dm_blk_report_zones (CVE-2025-38141)

    In the Linux kernel, the following vulnerability has been resolved:

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

    In the Linux kernel, the following vulnerability has been resolved:

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

    In the Linux kernel, the following vulnerability has been resolved:

    net: phy: clear phydev->devlink when the link is deleted (CVE-2025-38149)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf, sockmap: Avoid using sk_socket after free when sending (CVE-2025-38154)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_set_pipapo: prevent overflow in lookup table allocation (CVE-2025-38162)

    In the Linux kernel, the following vulnerability has been resolved:

    arm64/fpsimd: Avoid clobbering kernel FPSIMD state with SMSTOP (CVE-2025-38169)

    In the Linux kernel, the following vulnerability has been resolved:

    arm64/fpsimd: Discard stale CPU state when handling SME traps (CVE-2025-38170)

    In the Linux kernel, the following vulnerability has been resolved:

    erofs: avoid using multiple devices with different type (CVE-2025-38172)

    In the Linux kernel, the following vulnerability has been resolved:

    net: clear the dst when changing skb protocol (CVE-2025-38192)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: sch_sfq: reject invalid perturb period (CVE-2025-38193)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX (CVE-2025-38201)

    In the Linux kernel, the following vulnerability has been resolved:

    smb: client: add NULL check in automount_fullpath (CVE-2025-38208)

    In the Linux kernel, the following vulnerability has been resolved:

    configfs-tsm-report: Fix NULL dereference of tsm_ops (CVE-2025-38210)

    In the Linux kernel, the following vulnerability has been resolved:

    fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in fb_videomode_to_var (CVE-2025-38215)

    In the Linux kernel, the following vulnerability has been resolved:

    ext4: only dirty folios when data journaling regular files (CVE-2025-38220)

    In the Linux kernel, the following vulnerability has been resolved:

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

    In the Linux kernel, the following vulnerability has been resolved:

    serial: jsm: fix NPE during jsm_uart_port_init (CVE-2025-38265)

    In the Linux kernel, the following vulnerability has been resolved:

    net: drv: netdevsim: don't napi_complete() from netpoll (CVE-2025-38270)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Avoid __bpf_prog_ret0_warn when jit fails (CVE-2025-38280)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: smartpqi: Fix smp_processor_id() call trace for preemptible kernels (CVE-2025-38288)

    In the Linux kernel, the following vulnerability has been resolved:

    PM: EM: Fix potential division-by-zero error in em_compute_costs() (CVE-2025-38297)

    In the Linux kernel, the following vulnerability has been resolved:

    ptp: remove ptp->n_vclocks check logic in ptp_vclock_in_use() (CVE-2025-38305)

    In the Linux kernel, the following vulnerability has been resolved:

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

    In the Linux kernel, the following vulnerability has been resolved:

    arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth() (CVE-2025-38320)

    In the Linux kernel, the following vulnerability has been resolved:

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

ID	Name	Product	Family	Severity
247832	RHEL 10 : kernel (RHSA-2025:13598)	Nessus	Red Hat Local Security Checks	high
244140	Linux Distros Unpatched Vulnerability : CVE-2025-38084	Nessus	Misc.	medium
243500	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1111)	Nessus	Amazon Linux Local Security Checks	high
243421	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-098)	Nessus	Amazon Linux Local Security Checks	medium
242163	Photon OS 5.0: Linux PHSA-2025-5.0-0558	Nessus	PhotonOS Local Security Checks	high
241754	Amazon Linux 2 : kernel (ALASKERNEL-5.15-2025-082)	Nessus	Amazon Linux Local Security Checks	medium
241741	Amazon Linux 2023 : bpftool, kernel6.12, kernel6.12-modules-extra (ALAS2023-2025-1080)	Nessus	Amazon Linux Local Security Checks	medium

Detections

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CVE-2025-38084

high

Tenable Plugins

high

medium

high

medium

high

medium

medium