In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix RB-tree corruption in probe error path The info->node RB-tree member is zero-initialized via kzalloc. If a device does not support ATS, the device_rbtree_insert() call is skipped. If a subsequent probe step fails, the error path jumps to device_rbtree_remove(), which misinterprets the zeroed node as a tree root and corrupts the device RB-tree. Fix this by explicitly initializing the RB-node as empty using RB_CLEAR_NODE() during initialization and guarding the removal with RB_EMPTY_NODE().

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1793370479 advisory.

  - In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix buffer overflow in     debugfs If the user tries to write more than 32 bytes then it results in memory corruption. Fortunately,     this is debugfs so it's limited to root users. (CVE-2025-38317)

  - In the Linux kernel, the following vulnerability has been resolved: drm/xe/pf: Clear all LMTT pages on     alloc Our LMEM buffer objects are not cleared by default on alloc and during VF provisioning we only setup     LMTT PTEs for the actually provisioned LMEM range. But beyond that valid range we might leave some stale     data that could either point to some other VFs allocations or even to the PF pages. Explicitly clear all     new LMTT page to avoid the risk that a malicious VF would try to exploit that gap. While around add     asserts to catch any undesired PTE overwrites and low-level debug traces to track LMTT PT life-cycle.
    (cherry picked from commit 3fae6918a3e27cce20ded2551f863fb05d4bef8d) (CVE-2025-38511)

  - In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix memory leak in     ath12k_service_ready_ext_event Currently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps is     not freed in the failure case, causing a memory leak. The following trace is observed in kmemleak:
    unreferenced object 0xffff8b3eb5789c00 (size 1024): comm softirq, pid 0, jiffies 4294942577 hex dump     (first 32 bytes): 00 00 00 00 01 00 00 00 00 00 00 00 7b 00 00 10 ............{... 01 00 00 00 00 00 00 00     01 00 00 00 1f 38 00 00 .............8.. backtrace (crc 44e1c357): __kmalloc_noprof+0x30b/0x410     ath12k_wmi_mac_phy_caps_parse+0x84/0x100 [ath12k] ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]     ath12k_wmi_svc_rdy_ext_parse+0x308/0x4c0 [ath12k] ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]     ath12k_service_ready_ext_event.isra.0+0x44/0xd0 [ath12k] ath12k_wmi_op_rx+0x2eb/0xd70 [ath12k]     ath12k_htc_rx_completion_handler+0x1f4/0x330 [ath12k] ath12k_ce_recv_process_cb+0x218/0x300 [ath12k]     ath12k_pci_ce_workqueue+0x1b/0x30 [ath12k] process_one_work+0x219/0x680 bh_worker+0x198/0x1f0     tasklet_action+0x13/0x30 handle_softirqs+0xca/0x460 __irq_exit_rcu+0xbe/0x110 irq_exit_rcu+0x9/0x30 Free     svc_rdy_ext.mac_phy_caps in the error case to fix this memory leak. Tested-on: QCN9274 hw2.0 PCI     WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 (CVE-2025-39890)

  - In the Linux kernel, the following vulnerability has been resolved: bpf: Fix metadata_dst leak
    __bpf_redirect_neigh_v{4,6} Cilium has a BPF egress gateway feature which forces outgoing K8s Pod traffic     to pass through dedicated egress gateways which then SNAT the traffic in order to interact with stable IPs     outside the cluster. The traffic is directed to the gateway via vxlan tunnel in collect md mode. A recent     BPF change utilized the bpf_redirect_neigh() helper to forward packets after the arrival and decap on     vxlan, which turned out over time that the kmalloc-256 slab usage in kernel was ever-increasing. The issue     was that vxlan allocates the metadata_dst object and attaches it through a fake dst entry to the skb. The     latter was never released though given bpf_redirect_neigh() was merely setting the new dst entry via     skb_dst_set() without dropping an existing one first. (CVE-2025-40183)

  - In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_router: Fix neighbour     use-after-free We sometimes observe use-after-free when dereferencing a neighbour [1]. The problem seems     to be that the driver stores a pointer to the neighbour, but without holding a reference on it. A     reference is only taken when the neighbour is used by a nexthop. Fix by simplifying the reference counting     scheme. Always take a reference when storing a neighbour pointer in a neighbour entry. Avoid taking a     referencing when the neighbour is used by a nexthop as the neighbour entry associated with the nexthop     already holds a reference. Tested by running the test that uncovered the problem over 300 times. Without     this patch the problem was reproduced after a handful of iterations. [1] BUG: KASAN: slab-use-after-free     in mlxsw_sp_neigh_entry_update+0x2d4/0x310 Read of size 8 at addr ffff88817f8e3420 by task ip/3929 CPU: 3     UID: 0 PID: 3929 Comm: ip Not tainted 6.18.0-rc4-virtme-g36b21a067510 #3 PREEMPT(full) Hardware name:
    Nvidia SN5600/VMOD0013, BIOS 5.13 05/31/2023 Call Trace: <TASK> dump_stack_lvl+0x6f/0xa0     print_address_description.constprop.0+0x6e/0x300 print_report+0xfc/0x1fb kasan_report+0xe4/0x110     mlxsw_sp_neigh_entry_update+0x2d4/0x310 mlxsw_sp_router_rif_gone_sync+0x35f/0x510     mlxsw_sp_rif_destroy+0x1ea/0x730 mlxsw_sp_inetaddr_port_vlan_event+0xa1/0x1b0
    __mlxsw_sp_inetaddr_lag_event+0xcc/0x130 __mlxsw_sp_inetaddr_event+0xf5/0x3c0     mlxsw_sp_router_netdevice_event+0x1015/0x1580 notifier_call_chain+0xcc/0x150     call_netdevice_notifiers_info+0x7e/0x100 __netdev_upper_dev_unlink+0x10b/0x210     netdev_upper_dev_unlink+0x79/0xa0 vrf_del_slave+0x18/0x50 do_set_master+0x146/0x7d0     do_setlink.isra.0+0x9a0/0x2880 rtnl_newlink+0x637/0xb20 rtnetlink_rcv_msg+0x6fe/0xb90     netlink_rcv_skb+0x123/0x380 netlink_unicast+0x4a3/0x770 netlink_sendmsg+0x75b/0xc90
    __sock_sendmsg+0xbe/0x160 ____sys_sendmsg+0x5b2/0x7d0 ___sys_sendmsg+0xfd/0x180 __sys_sendmsg+0x124/0x1c0     do_syscall_64+0xbb/0xfd0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 [...] Allocated by task 109:
    kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x7b/0x90
    __kmalloc_noprof+0x2c1/0x790 neigh_alloc+0x6af/0x8f0 ___neigh_create+0x63/0xe90     mlxsw_sp_nexthop_neigh_init+0x430/0x7e0 mlxsw_sp_nexthop_type_init+0x212/0x960     mlxsw_sp_nexthop6_group_info_init.constprop.0+0x81f/0x1280 mlxsw_sp_nexthop6_group_get+0x392/0x6a0     mlxsw_sp_fib6_entry_create+0x46a/0xfd0 mlxsw_sp_router_fib6_replace+0x1ed/0x5f0     mlxsw_sp_router_fib6_event_work+0x10a/0x2a0 process_one_work+0xd57/0x1390 worker_thread+0x4d6/0xd40     kthread+0x355/0x5b0 ret_from_fork+0x1d4/0x270 ret_from_fork_asm+0x11/0x20 Freed by task 154:
    kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_save_free_info+0x3b/0x60
    __kasan_slab_free+0x43/0x70 kmem_cache_free_bulk.part.0+0x1eb/0x5e0 kvfree_rcu_bulk+0x1f2/0x260     kfree_rcu_work+0x130/0x1b0 process_one_work+0xd57/0x1390 worker_thread+0x4d6/0xd40 kthread+0x355/0x5b0     ret_from_fork+0x1d4/0x270 ret_from_fork_asm+0x11/0x20 Last potentially related work creation:
    kasan_save_stack+0x30/0x50 kasan_record_aux_stack+0x8c/0xa0 kvfree_call_rcu+0x93/0x5b0     mlxsw_sp_router_neigh_event_work+0x67d/0x860 process_one_work+0xd57/0x1390 worker_thread+0x4d6/0xd40     kthread+0x355/0x5b0 ret_from_fork+0x1d4/0x270 ret_from_fork_asm+0x11/0x20 (CVE-2025-68801)

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

The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1793370479 advisory.

  - In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix buffer overflow in     debugfs If the user tries to write more than 32 bytes then it results in memory corruption. Fortunately,     this is debugfs so it's limited to root users. (CVE-2025-38317)

  - In the Linux kernel, the following vulnerability has been resolved: drm/xe/pf: Clear all LMTT pages on     alloc Our LMEM buffer objects are not cleared by default on alloc and during VF provisioning we only setup     LMTT PTEs for the actually provisioned LMEM range. But beyond that valid range we might leave some stale     data that could either point to some other VFs allocations or even to the PF pages. Explicitly clear all     new LMTT page to avoid the risk that a malicious VF would try to exploit that gap. While around add     asserts to catch any undesired PTE overwrites and low-level debug traces to track LMTT PT life-cycle.
    (cherry picked from commit 3fae6918a3e27cce20ded2551f863fb05d4bef8d) (CVE-2025-38511)

  - In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix memory leak in     ath12k_service_ready_ext_event Currently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps is     not freed in the failure case, causing a memory leak. The following trace is observed in kmemleak:
    unreferenced object 0xffff8b3eb5789c00 (size 1024): comm softirq, pid 0, jiffies 4294942577 hex dump     (first 32 bytes): 00 00 00 00 01 00 00 00 00 00 00 00 7b 00 00 10 ............{... 01 00 00 00 00 00 00 00     01 00 00 00 1f 38 00 00 .............8.. backtrace (crc 44e1c357): __kmalloc_noprof+0x30b/0x410     ath12k_wmi_mac_phy_caps_parse+0x84/0x100 [ath12k] ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]     ath12k_wmi_svc_rdy_ext_parse+0x308/0x4c0 [ath12k] ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]     ath12k_service_ready_ext_event.isra.0+0x44/0xd0 [ath12k] ath12k_wmi_op_rx+0x2eb/0xd70 [ath12k]     ath12k_htc_rx_completion_handler+0x1f4/0x330 [ath12k] ath12k_ce_recv_process_cb+0x218/0x300 [ath12k]     ath12k_pci_ce_workqueue+0x1b/0x30 [ath12k] process_one_work+0x219/0x680 bh_worker+0x198/0x1f0     tasklet_action+0x13/0x30 handle_softirqs+0xca/0x460 __irq_exit_rcu+0xbe/0x110 irq_exit_rcu+0x9/0x30 Free     svc_rdy_ext.mac_phy_caps in the error case to fix this memory leak. Tested-on: QCN9274 hw2.0 PCI     WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 (CVE-2025-39890)

  - In the Linux kernel, the following vulnerability has been resolved: bpf: Fix metadata_dst leak
    __bpf_redirect_neigh_v{4,6} Cilium has a BPF egress gateway feature which forces outgoing K8s Pod traffic     to pass through dedicated egress gateways which then SNAT the traffic in order to interact with stable IPs     outside the cluster. The traffic is directed to the gateway via vxlan tunnel in collect md mode. A recent     BPF change utilized the bpf_redirect_neigh() helper to forward packets after the arrival and decap on     vxlan, which turned out over time that the kmalloc-256 slab usage in kernel was ever-increasing. The issue     was that vxlan allocates the metadata_dst object and attaches it through a fake dst entry to the skb. The     latter was never released though given bpf_redirect_neigh() was merely setting the new dst entry via     skb_dst_set() without dropping an existing one first. (CVE-2025-40183)

  - In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_router: Fix neighbour     use-after-free We sometimes observe use-after-free when dereferencing a neighbour [1]. The problem seems     to be that the driver stores a pointer to the neighbour, but without holding a reference on it. A     reference is only taken when the neighbour is used by a nexthop. Fix by simplifying the reference counting     scheme. Always take a reference when storing a neighbour pointer in a neighbour entry. Avoid taking a     referencing when the neighbour is used by a nexthop as the neighbour entry associated with the nexthop     already holds a reference. Tested by running the test that uncovered the problem over 300 times. Without     this patch the problem was reproduced after a handful of iterations. [1] BUG: KASAN: slab-use-after-free     in mlxsw_sp_neigh_entry_update+0x2d4/0x310 Read of size 8 at addr ffff88817f8e3420 by task ip/3929 CPU: 3     UID: 0 PID: 3929 Comm: ip Not tainted 6.18.0-rc4-virtme-g36b21a067510 #3 PREEMPT(full) Hardware name:
    Nvidia SN5600/VMOD0013, BIOS 5.13 05/31/2023 Call Trace: <TASK> dump_stack_lvl+0x6f/0xa0     print_address_description.constprop.0+0x6e/0x300 print_report+0xfc/0x1fb kasan_report+0xe4/0x110     mlxsw_sp_neigh_entry_update+0x2d4/0x310 mlxsw_sp_router_rif_gone_sync+0x35f/0x510     mlxsw_sp_rif_destroy+0x1ea/0x730 mlxsw_sp_inetaddr_port_vlan_event+0xa1/0x1b0
    __mlxsw_sp_inetaddr_lag_event+0xcc/0x130 __mlxsw_sp_inetaddr_event+0xf5/0x3c0     mlxsw_sp_router_netdevice_event+0x1015/0x1580 notifier_call_chain+0xcc/0x150     call_netdevice_notifiers_info+0x7e/0x100 __netdev_upper_dev_unlink+0x10b/0x210     netdev_upper_dev_unlink+0x79/0xa0 vrf_del_slave+0x18/0x50 do_set_master+0x146/0x7d0     do_setlink.isra.0+0x9a0/0x2880 rtnl_newlink+0x637/0xb20 rtnetlink_rcv_msg+0x6fe/0xb90     netlink_rcv_skb+0x123/0x380 netlink_unicast+0x4a3/0x770 netlink_sendmsg+0x75b/0xc90
    __sock_sendmsg+0xbe/0x160 ____sys_sendmsg+0x5b2/0x7d0 ___sys_sendmsg+0xfd/0x180 __sys_sendmsg+0x124/0x1c0     do_syscall_64+0xbb/0xfd0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 [...] Allocated by task 109:
    kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x7b/0x90
    __kmalloc_noprof+0x2c1/0x790 neigh_alloc+0x6af/0x8f0 ___neigh_create+0x63/0xe90     mlxsw_sp_nexthop_neigh_init+0x430/0x7e0 mlxsw_sp_nexthop_type_init+0x212/0x960     mlxsw_sp_nexthop6_group_info_init.constprop.0+0x81f/0x1280 mlxsw_sp_nexthop6_group_get+0x392/0x6a0     mlxsw_sp_fib6_entry_create+0x46a/0xfd0 mlxsw_sp_router_fib6_replace+0x1ed/0x5f0     mlxsw_sp_router_fib6_event_work+0x10a/0x2a0 process_one_work+0xd57/0x1390 worker_thread+0x4d6/0xd40     kthread+0x355/0x5b0 ret_from_fork+0x1d4/0x270 ret_from_fork_asm+0x11/0x20 Freed by task 154:
    kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_save_free_info+0x3b/0x60
    __kasan_slab_free+0x43/0x70 kmem_cache_free_bulk.part.0+0x1eb/0x5e0 kvfree_rcu_bulk+0x1f2/0x260     kfree_rcu_work+0x130/0x1b0 process_one_work+0xd57/0x1390 worker_thread+0x4d6/0xd40 kthread+0x355/0x5b0     ret_from_fork+0x1d4/0x270 ret_from_fork_asm+0x11/0x20 Last potentially related work creation:
    kasan_save_stack+0x30/0x50 kasan_record_aux_stack+0x8c/0xa0 kvfree_call_rcu+0x93/0x5b0     mlxsw_sp_router_neigh_event_work+0x67d/0x860 process_one_work+0xd57/0x1390 worker_thread+0x4d6/0xd40     kthread+0x355/0x5b0 ret_from_fork+0x1d4/0x270 ret_from_fork_asm+0x11/0x20 (CVE-2025-68801)

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix RB-tree corruption in
    probe error path The info->node RB-tree member is zero-initialized via kzalloc. If a device does not
    support ATS, the device_rbtree_insert() call is skipped. If a subsequent probe step fails, the error path
    jumps to device_rbtree_remove(), which misinterprets the zeroed node as a tree root and corrupts the
    device RB-tree. Fix this by explicitly initializing the RB-node as empty using RB_CLEAR_NODE() during
    initialization and guarding the removal with RB_EMPTY_NODE(). (CVE-2026-74355)

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

  - In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix RB-tree corruption in     probe error path The info->node RB-tree member is zero-initialized via kzalloc. If a device does not     support ATS, the device_rbtree_insert() call is skipped. If a subsequent probe step fails, the error path     jumps to device_rbtree_remove(), which misinterprets the zeroed node as a tree root and corrupts the     device RB-tree. Fix this by explicitly initializing the RB-node as empty using RB_CLEAR_NODE() during     initialization and guarding the removal with RB_EMPTY_NODE(). (CVE-2026-74355)

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

ID	Name	Product	Family	Type	Severity
374300	Rocky Linux 9.6 [TuxCare] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1793370479)	Nessus	Rocky Linux Local Security Checks	Local	high
374299	AlmaLinux 9.6 [TuxCare] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1793370479)	Nessus	Alma Linux Local Security Checks	Local	high
365768	Ubuntu 26.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8888-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365767	Ubuntu 26.04 LTS : Linux kernel vulnerabilities (USN-8887-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365463	Ubuntu 26.04 LTS : Linux kernel (OEM) vulnerabilities (USN-8889-1)	Nessus	Ubuntu Local Security Checks	Local	medium
471123	Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.21	Tenable Cloud Security	Google COS Security Checks	Local	high
471123	Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.21	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
341880	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-2071)	Nessus	Amazon Linux Local Security Checks	Local	high
337571	Linux Distros Unpatched Vulnerability : CVE-2026-74355	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-74355

high

Tenable Plugins

high

high

medium

medium

medium

high

high

high

high