AlmaLinux 9.2 主機已安裝的套件會受到 TuxCare ALMALINUX9.2：CLSA-2026：1791741836 公告中提及的多個弱點影響。

  - 已解決 Linux 核心中的下列弱點：vhost: fix hung thread due to erroneous iotlb entries In vhost_iotlb_add_range_ctx(), range size can overflow to 0 when start is 0 and last is ULONG_MAX. One instance where it can happen is when userspace sends an IOTLB message with iova=size=uaddr=0 (vhost_process_iotlb_msg). So, an entry with size = 0, start = 0, last = ULONG_MAX ends up in the iotlb. Next time a packet is sent, iotlb_access_ok() loops indefinitely due to that erroneous entry. Call Trace: <TASK> iotlb_access_ok+0x21b/0x3e0 drivers/vhost/vhost.c:1340 vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366 vhost_transport_do_send_pkt+0xe0/0xfd0 drivers/vhost/vsock.c:104 vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Reported by syzbot at:
    https://syzkaller.appspot.com/bug?extid=0abd373e2e50d704db87 To fix this, do two things: 1. Return -EINVAL in vhost_chr_write_iter() when userspace asks to map a range with size 0. 2. Fix vhost_iotlb_add_range_ctx() to handle the range [0, ULONG_MAX] by splitting it into two entries.
    (CVE-2022-48862)

  - 已解決 Linux 核心中的下列弱點：net: hns3: add vlan list lock to protect vlan list When adding port base VLAN, vf VLAN need to remove from HW and modify the vlan state in vf VLAN list as false. If the periodicity task is freeing the same node, it may cause use after free error. This patch adds a vlan list lock to protect the vlan list. (CVE-2022-49182)

  - 已解決 Linux 核心中的下列弱點：perf/x86/amd: Fix crash due to race between amd_pmu_enable_all, perf NMI and throttling amd_pmu_enable_all() does: if (!test_bit(idx, cpuc->active_mask)) continue; amd_pmu_enable_event(cpuc->events[idx]); A perf NMI of another event can come between these two steps. Perf NMI handler internally disables and enables _all_ events, including the one which nmi-intercepted amd_pmu_enable_all() was in process of enabling. If that unintentionally enabled event has very low sampling period and causes immediate successive NMI, causing the event to be throttled, cpuc->events[idx] and cpuc->active_mask gets cleared by x86_pmu_stop(). This will result in amd_pmu_enable_event() getting called with event=NULL when amd_pmu_enable_all() resumes after handling the NMIs. This causes a kernel crash: BUG: kernel NULL pointer dereference, address: 0000000000000198 #PF:
    supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page [...] Call Trace: <TASK> amd_pmu_enable_all+0x68/0xb0 ctx_resched+0xd9/0x150 event_function+0xb8/0x130 ? hrtimer_start_range_ns+0x141/0x4a0 ? perf_duration_warn+0x30/0x30 remote_function+0x4d/0x60
    __flush_smp_call_function_queue+0xc4/0x500 flush_smp_call_function_queue+0x11d/0x1b0 do_idle+0x18f/0x2d0 cpu_startup_entry+0x19/0x20 start_secondary+0x121/0x160 secondary_startup_64_no_verify+0xe5/0xeb </TASK> amd_pmu_disable_all()/amd_pmu_enable_all() calls inside perf NMI handler were recently added as part of BRS enablement but I'm not sure whether we really need them. We can just disable BRS in the beginning and enable it back while returning from NMI. This will solve the issue by not enabling those events whose active_masks are set but are not yet enabled in hw pmu. (CVE-2022-49781)

  - 已解決 Linux 核心中的下列弱點：blk-iolatency: Fix memory leak on add_disk() failures When a gendisk is successfully initialized but add_disk() fails such as when a loop device has invalid number of minor device numbers specified, blkcg_init_disk() is called during init and then blkcg_exit_disk() during error handling. Unfortunately, iolatency gets initialized in the former but doesn't get cleaned up in the latter. This is because, in non-error cases, the cleanup is performed by del_gendisk() calling rq_qos_exit(), the assumption being that rq_qos policies, iolatency being one of them, can only be activated once the disk is fully registered and visible. That assumption is true for wbt and iocost, but not so for iolatency as it gets initialized before add_disk() is called. It is desirable to lazy-init rq_qos policies because they are optional features and add to hot path overhead once initialized - each IO has to walk all the registered rq_qos policies. So, we want to switch iolatency to lazy init too. However, that's a bigger change. As a fix for the immediate problem, let's just add an extra call to rq_qos_exit() in blkcg_exit_disk(). This is safe because duplicate calls to rq_qos_exit() become noop's. (CVE-2022-50550)

  - 已解決 Linux 核心中的下列弱點：usb: roles: fix NULL pointer issue when put module's reference In current design, usb role class driver will get usb_role_switch parent's module reference after the user get usb_role_switch device and put the reference after the user put the usb_role_switch device. However, the parent device of usb_role_switch may be removed before the user put the usb_role_switch. If so, then, NULL pointer issue will be met when the user put the parent module's reference. This will save the module pointer in structure of usb_role_switch. Then, we don't need to find module by iterating long relations. (CVE-2024-26747)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且廠商未提供可用的修補程式。

  - svcrdma： 拒絕 segcount 為 0 的寫入/回覆區塊 對等節點可以傳送 segcount 欄位為零的寫入或回覆區塊。xdr_check_write_chunk（） 僅拒絕 segcount > rc_maxpages，因此 zero 通過範圍檢查，而 xdr_inline_decode（stream， 0） 返回當前 （非 NULL） 游標而不前進。該函數傳回 true，然後 pcl_alloc_write（） 將具有 ch_segcount == 0 的結構svc_rdma_chunk連結到 rc_write_pcl 或 rc_reply_pcl。本系列的早期修補程式使 pcl_for_each_segment（） 對 ch_segcount == 0 安全，因此這不再驅動過去的記憶體遍歷。拒絕解碼邊界處的格式錯誤的幀作為縱深防禦仍然值得：它將退化的零段區塊完全排除在解析的區塊清單之外，因此任何直接走ch_segments的未來消費者都無法觀察到一個，並且它使零層很容易向後移植到巨集更改更具侵入性的樹。RFC 8166 對於描述沒有遠端緩衝區的寫入/回覆區塊沒有任何意義，因此不會影響任何合法用戶端。xdr_check_reply_chunk（） 漏斗 Reply 透過 xdr_check_write_chunk（） 區塊，並繼承相同的拒絕。pcl_alloc_write（） 也會在填入其區段陣列之前，將每個區塊連結到剖析的區塊清單上。如果未來的變更削弱了 segcount-0 拒絕，則在填充迴圈期間消費者可以看到一個不完整的區塊。重新排序，使 list_add_tail（） 遵循區段填充迴圈，確保清單中僅顯示完全填入的區塊。（CVE-2026-93228）

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

ID	名稱	產品	系列	已發布	已更新	嚴重性
364688	AlmaLinux 9.2 [TuxCare] 安全性更新：bpftool / kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc 多個弱點（ALMALINUX9.2：CLSA-2026：1791741836）	Nessus	Alma Linux Local Security Checks	2026/10/12	2026/10/13	critical
350108	Linux Distros 未修補弱點：CVE-2026-93228	Nessus	Misc.	2026/9/25	2026/10/16	critical
351155	Debian dsa-6528 ： ata-modules-6.12.111+deb13-armmp-di - 安全性更新	Nessus	Debian Local Security Checks	2026/9/29	2026/9/29	high
362907	Debian dla-4817 ： ata-modules-6.12.107+deb12-armmp-di - 安全性更新	Nessus	Debian Local Security Checks	2026/10/4	2026/10/4	high
364137	Oracle Linux 10 / 9：Unbreakable Enterprise 核心 (ELSA-2026-500374)	Nessus	Oracle Linux Local Security Checks	2026/10/8	2026/10/8	high

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