In the Linux kernel, the following vulnerability has been resolved: net: fix udp gso skb_segment after pull from frag_list Commit a1e40ac5b5e9 ("net: gso: fix udp gso fraglist segmentation after pull from frag_list") detected invalid geometry in frag_list skbs and redirects them from skb_segment_list to more robust skb_segment. But some packets with modified geometry can also hit bugs in that code. We don't know how many such cases exist. Addressing each one by one also requires touching the complex skb_segment code, which risks introducing bugs for other types of skbs. Instead, linearize all these packets that fail the basic invariants on gso fraglist skbs. That is more robust. If only part of the fraglist payload is pulled into head_skb, it will always cause exception when splitting skbs by skb_segment. For detailed call stack information, see below. Valid SKB_GSO_FRAGLIST skbs - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or more frag_list skbs hold exactly one segment - all but the last must be gso_size Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify fraglist skbs, breaking these invariants. In extreme cases they pull one part of data into skb linear. For UDP, this causes three payloads with lengths of (11,11,10) bytes were pulled tail to become (12,10,10) bytes. The skbs no longer meets the above SKB_GSO_FRAGLIST conditions because payload was pulled into head_skb, it needs to be linearized before pass to regular skb_segment. skb_segment+0xcd0/0xd14 __udp_gso_segment+0x334/0x5f4 udp4_ufo_fragment+0x118/0x15c inet_gso_segment+0x164/0x338 skb_mac_gso_segment+0xc4/0x13c __skb_gso_segment+0xc4/0x124 validate_xmit_skb+0x9c/0x2c0 validate_xmit_skb_list+0x4c/0x80 sch_direct_xmit+0x70/0x404 __dev_queue_xmit+0x64c/0xe5c neigh_resolve_output+0x178/0x1c4 ip_finish_output2+0x37c/0x47c __ip_finish_output+0x194/0x240 ip_finish_output+0x20/0xf4 ip_output+0x100/0x1a0 NF_HOOK+0xc4/0x16c ip_forward+0x314/0x32c ip_rcv+0x90/0x118 __netif_receive_skb+0x74/0x124 process_backlog+0xe8/0x1a4 __napi_poll+0x5c/0x1f8 net_rx_action+0x154/0x314 handle_softirqs+0x154/0x4b8 [118.376811] [C201134] rxq0_pus: [name:bug&]kernel BUG at net/core/skbuff.c:4278! [118.376829] [C201134] rxq0_pus: [name:traps&]Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP [118.470774] [C201134] rxq0_pus: [name:mrdump&]Kernel Offset: 0x178cc00000 from 0xffffffc008000000 [118.470810] [C201134] rxq0_pus: [name:mrdump&]PHYS_OFFSET: 0x40000000 [118.470827] [C201134] rxq0_pus: [name:mrdump&]pstate: 60400005 (nZCv daif +PAN -UAO) [118.470848] [C201134] rxq0_pus: [name:mrdump&]pc : [0xffffffd79598aefc] skb_segment+0xcd0/0xd14 [118.470900] [C201134] rxq0_pus: [name:mrdump&]lr : [0xffffffd79598a5e8] skb_segment+0x3bc/0xd14 [118.470928] [C201134] rxq0_pus: [name:mrdump&]sp : ffffffc008013770

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

  - net: fix udp gso skb_segment after pull from frag_list Commit a1e40ac5b5e9 (net: gso: fix udp gso     fraglist segmentation after pull from frag_list) detected invalid geometry in frag_list skbs and     redirects them from skb_segment_list to more robust skb_segment. But some packets with modified geometry     can also hit bugs in that code. We don't know how many such cases exist. Addressing each one by one also     requires touching the complex skb_segment code, which risks introducing bugs for other types of skbs.
    Instead, linearize all these packets that fail the basic invariants on gso fraglist skbs. That is more     robust. If only part of the fraglist payload is pulled into head_skb, it will always cause exception when     splitting skbs by skb_segment. For detailed call stack information, see below. Valid SKB_GSO_FRAGLIST skbs
    - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or     more frag_list skbs hold exactly one segment - all but the last must be gso_size Optional datapath hooks     such as NAT and BPF (bpf_skb_pull_data) can modify fraglist skbs, breaking these invariants. In extreme     cases they pull one part of data into skb linear. For UDP, this causes three payloads with lengths of     (11,11,10) bytes were pulled tail to become (12,10,10) bytes. The skbs no longer meets the above     SKB_GSO_FRAGLIST conditions because payload was pulled into head_skb, it needs to be linearized before     pass to regular skb_segment. skb_segment+0xcd0/0xd14 __udp_gso_segment+0x334/0x5f4     udp4_ufo_fragment+0x118/0x15c inet_gso_segment+0x164/0x338 skb_mac_gso_segment+0xc4/0x13c
    __skb_gso_segment+0xc4/0x124 validate_xmit_skb+0x9c/0x2c0 validate_xmit_skb_list+0x4c/0x80     sch_direct_xmit+0x70/0x404 __dev_queue_xmit+0x64c/0xe5c neigh_resolve_output+0x178/0x1c4     ip_finish_output2+0x37c/0x47c __ip_finish_output+0x194/0x240 ip_finish_output+0x20/0xf4     ip_output+0x100/0x1a0 NF_HOOK+0xc4/0x16c ip_forward+0x314/0x32c ip_rcv+0x90/0x118
    __netif_receive_skb+0x74/0x124 process_backlog+0xe8/0x1a4 __napi_poll+0x5c/0x1f8 net_rx_action+0x154/0x314     handle_softirqs+0x154/0x4b8 [118.376811] [C201134] rxq0_pus: [name:bug&]kernel BUG at     net/core/skbuff.c:4278! [118.376829] [C201134] rxq0_pus: [name:traps&]Internal error: Oops - BUG:
    00000000f2000800 [#1] PREEMPT SMP [118.470774] [C201134] rxq0_pus: [name:mrdump&]Kernel Offset:
    0x178cc00000 from 0xffffffc008000000 [118.470810] [C201134] rxq0_pus: [name:mrdump&]PHYS_OFFSET:
    0x40000000 [118.470827] [C201134] rxq0_pus: [name:mrdump&]pstate: 60400005 (nZCv daif +PAN -UAO)     [118.470848] [C201134] rxq0_pus: [name:mrdump&]pc : [0xffffffd79598aefc] skb_segment+0xcd0/0xd14     [118.470900] [C201134] rxq0_pus: [name:mrdump&]lr : [0xffffffd79598a5e8] skb_segment+0x3bc/0xd14     [118.470928] [C201134] rxq0_pus: [name:mrdump&]sp : ffffffc008013770 (CVE-2025-38124)

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.

An update of the linux package has been released.

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
246208	Linux Distros Unpatched Vulnerability : CVE-2025-38124	Nessus	Misc.	medium
243500	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1111)	Nessus	Amazon Linux Local Security Checks	high
242163	Photon OS 5.0: Linux PHSA-2025-5.0-0558	Nessus	PhotonOS Local Security Checks	high
241741	Amazon Linux 2023 : bpftool, kernel6.12, kernel6.12-modules-extra (ALAS2023-2025-1080)	Nessus	Amazon Linux Local Security Checks	medium

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