In the Linux kernel, the following vulnerability has been resolved: x86/fpu: KVM: Set the base guest FPU uABI size to sizeof(struct kvm_xsave) Set the starting uABI size of KVM's guest FPU to 'struct kvm_xsave', i.e. to KVM's historical uABI size. When saving FPU state for usersapce, KVM (well, now the FPU) sets the FP+SSE bits in the XSAVE header even if the host doesn't support XSAVE. Setting the XSAVE header allows the VM to be migrated to a host that does support XSAVE without the new host having to handle FPU state that may or may not be compatible with XSAVE. Setting the uABI size to the host's default size results in out-of-bounds writes (setting the FP+SSE bits) and data corruption (that is thankfully caught by KASAN) when running on hosts without XSAVE, e.g. on Core2 CPUs. WARN if the default size is larger than KVM's historical uABI size; all features that can push the FPU size beyond the historical size must be opt-in. ================================================================== BUG: KASAN: slab-out-of-bounds in fpu_copy_uabi_to_guest_fpstate+0x86/0x130 Read of size 8 at addr ffff888011e33a00 by task qemu-build/681 CPU: 1 PID: 681 Comm: qemu-build Not tainted 5.18.0-rc5-KASAN-amd64 #1 Hardware name: /DG35EC, BIOS ECG3510M.86A.0118.2010.0113.1426 01/13/2010 Call Trace: <TASK> dump_stack_lvl+0x34/0x45 print_report.cold+0x45/0x575 kasan_report+0x9b/0xd0 fpu_copy_uabi_to_guest_fpstate+0x86/0x130 kvm_arch_vcpu_ioctl+0x72a/0x1c50 [kvm] kvm_vcpu_ioctl+0x47f/0x7b0 [kvm] __x64_sys_ioctl+0x5de/0xc90 do_syscall_64+0x31/0x50 entry_SYSCALL_64_after_hwframe+0x44/0xae </TASK> Allocated by task 0: (stack is not available) The buggy address belongs to the object at ffff888011e33800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes to the right of 512-byte region [ffff888011e33800, ffff888011e33a00) The buggy address belongs to the physical page: page:0000000089cd4adb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e30 head:0000000089cd4adb order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888001041c80 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888011e33900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888011e33980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888011e33a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888011e33a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888011e33b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Disabling lock debugging due to kernel taint

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    x86/fpu: KVM: Set the base guest FPU uABI size to sizeof(struct kvm_xsave).(CVE-2022-49557)

    A cross-privilege Spectre v2 vulnerability allows attackers to bypass all deployed mitigations, including     the recent Fine(IBT), and to leak arbitrary Linux kernel memory on Intel systems.(CVE-2024-2201)

    perf/x86/amd/uncore: Fix memory leak for events array(CVE-2022-49784)

    perf/x86/amd: Fix crash due to race between amd_pmu_enable_all, perf NMI and throttling(CVE-2022-49781)

    perf/x86/amd/core: Always clear status for idx(CVE-2023-53073)

    drm/drv: Fix potential memory leak in drm_dev_init().(CVE-2022-49830)

    drm/shmem-helper: Remove another errant put in error path(CVE-2023-53084)

    perf/core: Fix perf_output_begin parameter is incorrectly invoked in perf_event_bpf_output(CVE-2023-53065)

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

    arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs(CVE-2025-37948)

    crypto: null - Use spin lock instead of mutex(CVE-2025-37808)

    tracing: Fix oob write in trace_seq_to_buffer().(CVE-2025-37923)

    media: dw2102: Fix null-ptr-deref in dw2102_i2c_transfer().(CVE-2023-53146)

    usb: ucsi: Fix NULL pointer deref in ucsi_connector_change().(CVE-2023-53049)

    iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid(CVE-2025-37927)

    drm/nouveau: Fix WARN_ON in nouveau_fence_context_kill().(CVE-2025-37930)

    module: ensure that kobject_put() is safe for module type kobjects(CVE-2025-37995)

    bnxt_en: Fix out-of-bound memcpy() during ethtool -w(CVE-2025-37911)

    capabilities: fix undefined behavior in bit shift for CAP_TO_MASK(CVE-2022-49870)

    HID: intel-ish-hid: ipc: Fix potential use-after-free in work function(CVE-2023-53039)

    IB/hfi1: Correctly move list in sc_disable().(CVE-2022-49931)

    tpm: do not start chip while suspended(CVE-2025-23149)

    bpf: check changes_pkt_data property for extension programs(CVE-2024-58100)

Tenable has extracted the preceding description block directly from the EulerOS kernel security advisory.

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

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc(CVE-2025-37890)

    crypto: lzo - Fix compression buffer overrun(CVE-2025-38068)

    net: pktgen: fix access outside of user given buffer in pktgen_thread_write().(CVE-2025-38061)

    net_sched: drr: Fix double list add in class with netem as child qdisc(CVE-2025-37915)

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

    net_sched: qfq: Fix double list add in class with netem as child qdisc(CVE-2025-37913)

    net: avoid race between device unregistration and ethnl ops(CVE-2025-21701)

    sctp: detect and prevent references to a freed transport in sendmsg(CVE-2025-23142)

    codel: remove sch-q.qlen check before qdisc_tree_reduce_backlog().(CVE-2025-37798)

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

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

    vhost-scsi: protect vq-log_used with vq-mutex(CVE-2025-38074)

    ftrace: Add cond_resched() to ftrace_graph_set_hash().(CVE-2025-37940)

    crypto: null - Use spin lock instead of mutex(CVE-2025-37808)

    tipc: fix memory leak in tipc_link_xmit(CVE-2025-37757)

    ice: fix Tx scheduler error handling in XDP callback(CVE-2025-38127)

    dmaengine: idxd: Refactor remove call with idxd_cleanup() helper(CVE-2025-38014)

    arm64: set UXN on swapper page tables(CVE-2022-50232)

    tipc: fix NULL pointer dereference in tipc_mon_reinit_self().(CVE-2025-37824)

    ext4: update s_journal_inum if it changes after journal replay(CVE-2023-53091)

    media: cx231xx: set device_caps for 417(CVE-2025-38044)

    net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done(CVE-2025-38052)

    RDMA/core: Silence oversized kvmalloc() warning(CVE-2025-37867)

    tracing: Fix oob write in trace_seq_to_buffer().(CVE-2025-37923)

    arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs(CVE-2025-37948)

    HID: pidff: Fix null pointer dereference in pidff_find_fields(CVE-2025-37862)

    bpf: track changes_pkt_data property for global functions(CVE-2024-58098)

    jbd2: remove wrong sb-s_sequence check(CVE-2025-37839)

    udp: Fix memory accounting leak.(CVE-2025-22058)

    tpm: do not start chip while suspended(CVE-2025-23149)

    tracing: Do not let histogram values have some modifiers(CVE-2023-53093)

    dm cache: prevent BUG_ON by blocking retries on failed device resumes(CVE-2025-38066)

    netfilter: ipset: fix region locking in hash types(CVE-2025-37997)

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

    block: fix rq-qos breakage from skipping rq_qos_done_bio().(CVE-2022-49266)

    bnxt_en: Fix out-of-bound memcpy() during ethtool -w(CVE-2025-37911)

    VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify(CVE-2025-38102)

    scsi: target: iscsi: Fix timeout on deleted connection(CVE-2025-38075)

    iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid(CVE-2025-37927)

    net: fix memory leak in tcp_conn_request().(CVE-2024-57841)

    jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata().(CVE-2025-38337)

    drm/ nouveau: Fix WARN_ON in nouveau_fence_context_kill().(CVE-2025-37930)

    arm64: set UXN on swapper page tables(CVE-2022-50230)

    cxgb4: fix memory leak in cxgb4_init_ethtool_filters() error path(CVE-2025-37788)

    x86/fpu: KVM: Set the base guest FPU uABI size to sizeof(struct kvm_xsave).(CVE-2022-49557)

    sch_htb: make htb_qlen_notify() idempotent(CVE-2025-37932)

    net: usb: lan78xx: Limit packet length to skb-len(CVE-2023-53068)

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

    net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too(CVE-2025-37823)

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

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

    media: cxusb: no longer judge rbuf when the write fails(CVE-2025-38229)

    xsk: Fix race condition in AF_XDP generic RX path(CVE-2025-37920)

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

    net_sched: hfsc: Fix a UAF vulnerability in class handling(CVE-2025-37797)

    block: mark GFP_NOIO around sysfs -store().(CVE-2025-21817)

    module: ensure that kobject_put() is safe for module type kobjects(CVE-2025-37995)

    bpf: Fix a data-race around bpf_jit_limit.(CVE-2022-49967)

    ext4: ignore xattrs past end(CVE-2025-37738)

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

    sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue().(CVE-2025-38000)

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

Tenable has extracted the preceding description block directly from the EulerOS kernel 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 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: x86/fpu: KVM: Set the base guest FPU     uABI size to sizeof(struct kvm_xsave) Set the starting uABI size of KVM's guest FPU to 'struct kvm_xsave',     i.e. to KVM's historical uABI size. When saving FPU state for usersapce, KVM (well, now the FPU) sets the     FP+SSE bits in the XSAVE header even if the host doesn't support XSAVE. Setting the XSAVE header allows     the VM to be migrated to a host that does support XSAVE without the new host having to handle FPU state     that may or may not be compatible with XSAVE. Setting the uABI size to the host's default size results in     out-of-bounds writes (setting the FP+SSE bits) and data corruption (that is thankfully caught by KASAN)     when running on hosts without XSAVE, e.g. on Core2 CPUs. WARN if the default size is larger than KVM's     historical uABI size; all features that can push the FPU size beyond the historical size must be opt-in.
    ================================================================== BUG: KASAN: slab-out-of-bounds in     fpu_copy_uabi_to_guest_fpstate+0x86/0x130 Read of size 8 at addr ffff888011e33a00 by task qemu-build/681     CPU: 1 PID: 681 Comm: qemu-build Not tainted 5.18.0-rc5-KASAN-amd64 #1 Hardware name: /DG35EC, BIOS     ECG3510M.86A.0118.2010.0113.1426 01/13/2010 Call Trace: <TASK> dump_stack_lvl+0x34/0x45     print_report.cold+0x45/0x575 kasan_report+0x9b/0xd0 fpu_copy_uabi_to_guest_fpstate+0x86/0x130     kvm_arch_vcpu_ioctl+0x72a/0x1c50 [kvm] kvm_vcpu_ioctl+0x47f/0x7b0 [kvm] __x64_sys_ioctl+0x5de/0xc90     do_syscall_64+0x31/0x50 entry_SYSCALL_64_after_hwframe+0x44/0xae </TASK> Allocated by task 0: (stack is     not available) The buggy address belongs to the object at ffff888011e33800 which belongs to the cache     kmalloc-512 of size 512 The buggy address is located 0 bytes to the right of 512-byte region     [ffff888011e33800, ffff888011e33a00) The buggy address belongs to the physical page: page:0000000089cd4adb     refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e30 head:0000000089cd4adb order:2     compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200     dead000000000100 dead000000000122 ffff888001041c80 raw: 0000000000000000 0000000080100010 00000001ffffffff     0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address:
    ffff888011e33900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888011e33980: 00 00 00 00 00 00 00     00 00 00 00 00 00 00 00 00 >ffff888011e33a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^     ffff888011e33a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888011e33b00: fc fc fc fc fc fc fc     fc fc fc fc fc fc fc fc fc ================================================================== Disabling     lock debugging due to kernel taint (CVE-2022-49557)

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

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:8267 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * off-path attacker may inject data or terminate victim's TCP session (CVE-2020-36516)

    * use-after-free vulnerability in function sco_sock_sendmsg() (CVE-2021-3640)

    * smb2_ioctl_query_info NULL pointer dereference (CVE-2022-0168)

    * NULL pointer dereference in udf_expand_file_adinicbdue() during writeback (CVE-2022-0617)

    * swiotlb information leak with DMA_FROM_DEVICE (CVE-2022-0854)

    * uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM (CVE-2022-1016)

    * race condition in snd_pcm_hw_free leading to use-after-free (CVE-2022-1048)

    * use-after-free and memory errors in ext4 when mounting and operating on a corrupted image     (CVE-2022-1184)

    * concurrency use-after-free between drm_setmaster_ioctl and drm_mode_getresources (CVE-2022-1280)

    * kernel info leak issue in pfkey_register (CVE-2022-1353)

    * use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges (CVE-2022-1679)

    * NULL pointer dereference in x86_emulate_insn may lead to DoS (CVE-2022-1852)

    * fanotify misuses fd_install() which could lead to use-after-free (CVE-2022-1998)

    * nf_tables cross-table potential use-after-free may lead to local privilege escalation (CVE-2022-2586)

    * integer underflow leads to out-of-bounds write in reserve_sfa_size() (CVE-2022-2639)

    * slab-out-of-bounds access in packet_recvmsg() (CVE-2022-20368)

    * incomplete clean-up of multi-core shared buffers (aka SBDR) (CVE-2022-21123)

    * incomplete clean-up of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)

    * incomplete clean-up in specific special register write operations (aka DRPW) (CVE-2022-21166)

    * possible to use the debugger to write zero into a location of choice (CVE-2022-21499)

    * AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-23816,     CVE-2022-29900)

    * AMD: Branch Type Confusion (non-retbleed) (CVE-2022-23825)

    * Intel: Post-barrier Return Stack Buffer Predictions (CVE-2022-26373)

    * double free in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c (CVE-2022-28390)

    * use after free in SUNRPC subsystem (CVE-2022-28893)

    * use-after-free due to improper update of reference count in net/sched/cls_u32.c (CVE-2022-29581)

    * Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-29901)

    * DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c (CVE-2022-36946)

    * nf_tables disallow binding to already bound chain (CVE-2022-39190)

    * nfs_atomic_open() returns uninitialized data instead of ENOTDIR (CVE-2022-24448)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.1 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:6460 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123)

    * Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)

    * Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * Bad page state in process qemu-kvm  pfn:68a74600 (BZ#2081013)

    * slub corruption during  LPM of hnv interface (BZ#2081250)

    * Affinity broken due to vector space exhaustion (BZ#2084646)

    * 'rmmod pmt_telemetry' panics on ADL-P IOTG (BZ#2091079)

    * Unable to boot RHEL-8.6 on Brazos max. config (Install is success) (BZ#2092241)

    * kernel crash after reboot of T14/G2 AMD laptop (mt7921e module) (BZ#2095654)

    * mt7921: free resources on pci_probe error path (BZ#2101684)

    * NLM should be more defensive if underlying FS changes fl_owner (BZ#2102099)

    * RHEL8/async-pf Guest call trace when reboot after postcopy migration with high stress workload     (BZ#2105340)

    * execve exit tracepoint not called (BZ#2106662)

    * QProcess dead lock on kernel-4.18.0-358 (BZ#2107643)

    * KVM fix guest FPU uABI size to kvm_xsave (BZ#2107652)

    * KVM selftests fail to compile (BZ#2107655)

    * Some monitor have no display with AMD W6400 when boot into OS. (BZ#2109826)

    * Percpu counter usage is gradually getting increasing during podman container recreation. (BZ#2110039)

    * multipath failed to recover after EEH hit on flavafish adapter on     Denali(qla2xxx/flavafish/RHEL8.6/Denali) (BZ#2110768)

    * soft lockups under heavy I/O load to ahci connected SSDs (BZ#2110772)

    * trouble re-assigning MACs to VFs, ice stricter than other drivers (BZ#2111936)

    * Intel MPI 2019.0 - mpirun stuck on latest kernel (BZ#2112030)

    * Multicast packets are not received by all VFs on the same port even though they have the same VLAN     (BZ#2117026)

    * Hyper-V 2019 Dynamic Memory Problem hv_balloon (BZ#2117050)

    * kernel BUG at kernel/sched/deadline.c:1561! (BZ#2117410)

    * ALSA (sound) driver - update Intel SOF kcontrol code (BZ#2117732)

    * bridge over bond over ice ports has no connection (BZ#2118580)

    * Fix max VLANs available for VF (BZ#2118581)

    * offline selftest failed (BZ#2118582)

    * INTEL NVMUpdate utility ver 3.20 is failing to update firmware on E810-XXVDA4T (WPC) (BZ#2118583)

    * VM configured with failover interface will coredump after been migrating from source host to target     host(only iavf driver) (BZ#2118705)

    * Fix max VLANs available for untrusted VF (BZ#2118707)

    * Softlockup on infinite loop in task_get_css() for a CSS_DYING cpuset (BZ#2120776)

    Enhancement(s):

    * KVM Sapphire Rapids (SPR) AMX Instructions (BZ#2088287)

    * KVM Sapphire Rapids (SPR) AMX Instructions part2 (BZ#2088288)

    * ice: Driver Update (BZ#2102359)

    * iavf: Driver Update (BZ#2102360)

    * iommu/vt-d: Make DMAR_UNITS_SUPPORTED a config setting (BZ#2112983)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

ID	Name	Product	Family	Severity
264856	EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-2134)	Nessus	Huawei Local Security Checks	medium
264850	EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-2144)	Nessus	Huawei Local Security Checks	medium
264474	EulerOS 2.0 SP12 : kernel (EulerOS-SA-2025-2012)	Nessus	Huawei Local Security Checks	medium
261882	EulerOS 2.0 SP12 : kernel (EulerOS-SA-2025-2043)	Nessus	Huawei Local Security Checks	medium
249482	Linux Distros Unpatched Vulnerability : CVE-2022-49557	Nessus	Misc.	medium
167620	RHEL 9 : kernel (RHSA-2022:8267)	Nessus	Red Hat Local Security Checks	high
164964	RHEL 8 : kernel (RHSA-2022:6460)	Nessus	Red Hat Local Security Checks	high

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CVE-2022-49557

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