远程主机上安装的内核版本低于 5.4.162-86.275。因此，会受到 ALAS2KERNEL-5.4-2022-010 公告中提及的多个漏洞影响。

    2024-08-27：已将 CVE-2021-47190 添加到此公告中。

    2024-08-27：已将 CVE-2021-47184 添加到此公告中。

    2024-08-27：已将 CVE-2021-47185 添加到此公告中。

    2024-08-27：已将 CVE-2021-47192 添加到此公告中。

    2024-08-27：已将 CVE-2021-47203 添加到此公告中。

    2024-08-27：已将 CVE-2021-47201 添加到此公告中。

    2024-08-27：已将 CVE-2021-47189 添加到此公告中。

    2024-08-27：已将 CVE-2021-47217 添加到此公告中。

    2024-04-30：已将 CVE-2023-0047 从此公告（已拒绝）中删除。

    2024-02-01：已将 CVE-2023-0047 添加到此公告中。

    在 Linux 内核中发现一个漏洞，即如果删除设备，则 nouveau 的 postclose() 处理程序中可能发生释放后使用错误（不关机即物理移除视频卡的情况并不常见，但在解除绑定驱动程序时也会发生）。(CVE-2020-27820)

    在用户调用 ioct UFFDIO_REGISTER 的方式或其他触发争用条件（使用预期可控的错误内存页面调用 sco_conn_del() together 以及调用 sco_sock_sendmsg()）的方式中，发现 Linux 内核 HCI 子系统的函数 sco_sock_sendmsg() 中存在一个释放后使用缺陷。特权本地用户可利用此缺陷造成系统崩溃，或提升其在系统中的特权。
    (CVE-2021-3640)

    在 Linux SCTP 堆栈中发现一个缺陷。如果攻击者知道正在使用的 IP 地址和端口号，并且可以发送含伪造 IP 地址的数据包，就有可能通过无效区块终止现有 SCTP 关联。(CVE-2021-3772)

    在 Linux 内核的 ebpf 验证器中发现 bpf_map_update_elem 与 bpf_map_freeze 之间存在争用条件，原因是 kernel/bpf/syscall.c 中缺少锁定。在此缺陷中，具有特殊权限（cap_sys_admin 或 cap_bpf）的本地用户可修改已冻结的映射地址空间。(CVE-2021-4001)

    在用户使用 shmget() 两次映射某些内存区域（与某些内存页的故障一起对齐到 PUD 对齐）的方式中，发现 Linux 内核的 hugetlbfs 在使用内存时出现内存泄漏缺陷。本地用户可利用此缺陷，在未经授权的情况下访问某些数据。(CVE-2021-4002)

    在 Linux 内核中，以下漏洞已修复：

    i40e：修复 VSI 过滤器同步上的空 ptr 取消引用 (CVE-2021-47184)

    在 Linux 内核中，以下漏洞已修复：

    tty：tty_buffer：修复 flush_to_ldisc 中的 softlockup (CVE-2021-47185)

    在 Linux 内核中，以下漏洞已修复：

    btrfs：修复正常工作功能和有序工作功能之间的内存排序 (CVE-2021-47189)

    在 Linux 内核中，以下漏洞已修复：

    perf bpf：避免 perf_env__insert_btf() 发生内存泄漏 (CVE-2021-47190)

    在 Linux 内核中，以下漏洞已修复：

    scsi：core：sysfs：修复通过 sysfs 设置设备状态时的挂起 (CVE-2021-47192)

    在 Linux 内核中，以下漏洞已修复：

    iavf：在 iavf_disable_vf 中的队列之前释放 q_vectors(CVE-2021-47201)

    在 Linux 内核中，以下漏洞已修复：

    scsi：lpfc：修复 lpfc_drain_txq() 中的 list_add() 损坏 (CVE-2021-47203)

    在 Linux 内核中，以下漏洞已修复：

    x86/hyperv：修复 Hyper-V 设置失败时 set_hv_tschange_cb() 中的空取消引用 (CVE-2021-47217)

Tenable 已直接从测试产品的安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程主机上安装的内核版本低于 5.4.162-86.275。因此，会受到 ALAS2KERNEL-5.4-2025-093 公告中提及的多个漏洞影响。

    在 Linux 内核中发现一个漏洞，即如果删除设备，则 nouveau 的 postclose() 处理程序中可能发生释放后使用错误（不关机即物理移除视频卡的情况并不常见，但在解除绑定驱动程序时也会发生）。(CVE-2020-27820)

    在用户调用 ioct UFFDIO_REGISTER 的方式或其他触发争用条件（使用预期可控的错误内存页面调用 sco_conn_del() together 以及调用 sco_sock_sendmsg()）的方式中，发现 Linux 内核 HCI 子系统的函数 sco_sock_sendmsg() 中存在一个释放后使用缺陷。特权本地用户可利用此缺陷造成系统崩溃，或提升其在系统中的特权。
    (CVE-2021-3640)

    在 Linux SCTP 堆栈中发现一个缺陷。如果攻击者知道正在使用的 IP 地址和端口号，并且可以发送含伪造 IP 地址的数据包，就有可能通过无效区块终止现有 SCTP 关联。(CVE-2021-3772)

    在 Linux 内核的 ebpf 验证器中发现 bpf_map_update_elem 与 bpf_map_freeze 之间存在争用条件，原因是 kernel/bpf/syscall.c 中缺少锁定。在此缺陷中，具有特殊权限（cap_sys_admin 或 cap_bpf）的本地用户可修改已冻结的映射地址空间。(CVE-2021-4001)

    在用户使用 shmget() 两次映射某些内存区域（与某些内存页的故障一起对齐到 PUD 对齐）的方式中，发现 Linux 内核的 hugetlbfs 在使用内存时出现内存泄漏缺陷。本地用户可利用此缺陷，在未经授权的情况下访问某些数据。(CVE-2021-4002)

    在 Linux 内核中，以下漏洞已修复：

    i40e：修复 VSI 过滤器同步上的空 ptr 取消引用 (CVE-2021-47184)

    在 Linux 内核中，以下漏洞已修复：

    tty：tty_buffer：修复 flush_to_ldisc 中的 softlockup (CVE-2021-47185)

    在 Linux 内核中，以下漏洞已修复：

    btrfs：修复正常工作功能和有序工作功能之间的内存排序 (CVE-2021-47189)

    在 Linux 内核中，以下漏洞已修复：

    perf bpf：避免 perf_env__insert_btf() 发生内存泄漏 (CVE-2021-47190)

    在 Linux 内核中，以下漏洞已修复：

    scsi：core：sysfs：修复通过 sysfs 设置设备状态时的挂起 (CVE-2021-47192)

    在 Linux 内核中，以下漏洞已修复：

    iavf：在 iavf_disable_vf 中的队列之前释放 q_vectors(CVE-2021-47201)

    在 Linux 内核中，以下漏洞已修复：

    scsi：lpfc：修复 lpfc_drain_txq() 中的 list_add() 损坏 (CVE-2021-47203)

    在 Linux 内核中，以下漏洞已修复：

    x86/hyperv：修复 Hyper-V 设置失败时 set_hv_tschange_cb() 中的空取消引用 (CVE-2021-47217)

    在 Linux 内核中，以下漏洞已修复：

    isofs修复已损坏 isofs 图像的越界访问 (CVE-2021-47478)

    在 Linux 内核中，以下漏洞已修复：

    scsicore在 SCSI 设备发布后放置 LLD 模块 refcnt (CVE-2021-47480)

    在 Linux 内核中，以下漏洞已修复：

    regmap：修复 regcache_rbtree_exit() 中可能包含的双重释放漏洞 (CVE-2021-47483)

    在 Linux 内核中，以下漏洞已修复：

    drm/ttm修复 ttm_transfered_destroy 中的内存泄漏 (CVE-2021-47490)

    在 Linux 内核中，以下漏洞已修复：

    usbnetmaxpacket 的健全性检查 (CVE-2021-47495)

    在 Linux 内核中，以下漏洞已修复：

    net/tls：修复 tls_err_abort() 调用中的翻转登录 (CVE-2021-47496)

Tenable 已直接从测试产品的安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程 CentOS Linux 9 主机上安装的多个程序包受到 kernel-5.14.0-347.el9 版本变更日志中提及的多个漏洞影响。

  - 在 Linux 内核用户使用 TIPC 协议功能发送带有恶意内容的数据包时发现了一个堆栈溢出缺陷，其中域成员节点的数量超过允许的 64 个。
    具有 TIPC 网络访问权限的本地用户可利用此缺陷导致系统奔溃或升级其权限。(CVE-2022-0435)

  - 在版本低于 5.14.16 的 Linux 内核的 net/tipc/crypto.c 中发现一个问题。远程攻击者可利用透明进程间通信 (TIPC) 功能，进而利用未充分验证用户提供的 MSG_CRYPTO 消息类型大小这一漏洞。(CVE-2021-43267)

  - 在 Linux 内核中发现一个漏洞，即如果删除设备，则 nouveau 的 postclose() 处理程序中可能发生释放后使用错误（不关机即物理移除视频卡的情况并不常见，但在解除绑定驱动程序时也会发生）。(CVE-2020-27820)

  - 在 Linux 内核 5.16.11 及之前的版本中发现问题。混合 IPID 分配方法使用基于哈希的 IPID 分配策略，这将允许路径外攻击者将数据注入受害者的 TCP 会话或终止该会话。(CVE-2020-36516)

  - 在 Linux 内核功能中，于处理接收到的 ICMP 错误（需要 ICMP 片段和 ICMP 重定向）时发现了一个缺陷，允许快速扫描打开的 UDP 端口。此缺陷允许路径外的远程用户有效绕过源端口 UDP 随机化。此漏洞最主要的威胁对象是机密性，且可能对完整性造成威胁，因为依赖 UDP 源端口随机化的软件也会间接受到影响。(CVE-2021-20322)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0181-1 advisory.

  - Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to     multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the     ability to run PV backends in regular unprivileged guests, typically referred to as driver domains.
    Running PV backends in driver domains has one primary security advantage: if a driver domain gets     compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain     could try to attack other guests via sending events at a high frequency leading to a Denial of Service in     the guest due to trying to service interrupts for elongated amounts of time. There are three affected     backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch     3, CVE-2021-28713 (CVE-2021-28711, CVE-2021-28712, CVE-2021-28713)

  - Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record     relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]     Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is     ready to process them. There are some measures taken for avoiding to pile up too much data, but those can     be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming     new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default).
    Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time.
    (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in     its RX queue ring page and the next package would require more than one free slot, which may be the case     when using GSO, XDP, or software hashing. (CVE-2021-28714) (CVE-2021-28714, CVE-2021-28715)

  - Improper input validation in the Intel(R) Ethernet ixgbe driver for Linux before version 3.17.3 may allow     an authenticated user to potentially enable denial of service via local access. (CVE-2021-33098)

  - A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel     versions prior to 5.16 rc2. (CVE-2021-4001)

  - A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some     regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the     memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

  - In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in     drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a     crafted device) to trigger an out-of-bounds write via a crafted length value. (CVE-2021-43975)

  - In the Linux kernel through 5.15.2, mwifiex_usb_recv in drivers/net/wireless/marvell/mwifiex/usb.c allows     an attacker (who can connect a crafted USB device) to cause a denial of service (skb_over_panic).
    (CVE-2021-43976)

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

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0079-1 advisory.

  - Uncontrolled resource consumption in some Intel(R) Ethernet E810 Adapter drivers for Linux before version     1.0.4 may allow an authenticated user to potentially enable denial of service via local access.
    (CVE-2020-24504)

  - A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could     happen if removing device (that is not common to remove video card physically without power-off, but same     happens if unbind the driver). (CVE-2020-27820)

  - Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to     multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the     ability to run PV backends in regular unprivileged guests, typically referred to as driver domains.
    Running PV backends in driver domains has one primary security advantage: if a driver domain gets     compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain     could try to attack other guests via sending events at a high frequency leading to a Denial of Service in     the guest due to trying to service interrupts for elongated amounts of time. There are three affected     backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch     3, CVE-2021-28713 (CVE-2021-28711, CVE-2021-28712, CVE-2021-28713)

  - Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record     relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]     Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is     ready to process them. There are some measures taken for avoiding to pile up too much data, but those can     be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming     new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default).
    Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time.
    (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in     its RX queue ring page and the next package would require more than one free slot, which may be the case     when using GSO, XDP, or software hashing. (CVE-2021-28714) (CVE-2021-28714, CVE-2021-28715)

  - Improper input validation in the Intel(R) Ethernet ixgbe driver for Linux before version 3.17.3 may allow     an authenticated user to potentially enable denial of service via local access. (CVE-2021-33098)

  - A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel     versions prior to 5.16 rc2. (CVE-2021-4001)

  - A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some     regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the     memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

  - In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in     drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a     crafted device) to trigger an out-of-bounds write via a crafted length value. (CVE-2021-43975)

  - In the Linux kernel through 5.15.2, mwifiex_usb_recv in drivers/net/wireless/marvell/mwifiex/usb.c allows     an attacker (who can connect a crafted USB device) to cause a denial of service (skb_over_panic).
    (CVE-2021-43976)

  - In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information     leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based     attackers can typically choose among many IPv6 source addresses. (CVE-2021-45485)

  - In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak     because the hash table is very small. (CVE-2021-45486)

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

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0131-1 advisory.

  - Uncontrolled resource consumption in some Intel(R) Ethernet E810 Adapter drivers for Linux before version     1.0.4 may allow an authenticated user to potentially enable denial of service via local access.
    (CVE-2020-24504)

  - A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could     happen if removing device (that is not common to remove video card physically without power-off, but same     happens if unbind the driver). (CVE-2020-27820)

  - Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to     multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the     ability to run PV backends in regular unprivileged guests, typically referred to as driver domains.
    Running PV backends in driver domains has one primary security advantage: if a driver domain gets     compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain     could try to attack other guests via sending events at a high frequency leading to a Denial of Service in     the guest due to trying to service interrupts for elongated amounts of time. There are three affected     backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch     3, CVE-2021-28713 (CVE-2021-28711, CVE-2021-28712, CVE-2021-28713)

  - Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record     relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]     Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is     ready to process them. There are some measures taken for avoiding to pile up too much data, but those can     be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming     new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default).
    Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time.
    (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in     its RX queue ring page and the next package would require more than one free slot, which may be the case     when using GSO, XDP, or software hashing. (CVE-2021-28714) (CVE-2021-28714, CVE-2021-28715)

  - A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel     versions prior to 5.16 rc2. (CVE-2021-4001)

  - A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some     regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the     memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

  - In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in     drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a     crafted device) to trigger an out-of-bounds write via a crafted length value. (CVE-2021-43975)

  - In the Linux kernel through 5.15.2, mwifiex_usb_recv in drivers/net/wireless/marvell/mwifiex/usb.c allows     an attacker (who can connect a crafted USB device) to cause a denial of service (skb_over_panic).
    (CVE-2021-43976)

  - In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information     leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based     attackers can typically choose among many IPv6 source addresses. (CVE-2021-45485)

  - In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak     because the hash table is very small. (CVE-2021-45486)

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

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5265-1 advisory.

    Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during device     removal. A privileged or physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2020-27820)

    It was discovered that the Bluetooth subsystem in the Linux kernel contained a use-after-free     vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2021-3640)

    Likang Luo discovered that a race condition existed in the Bluetooth subsystem of the Linux kernel,     leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2021-3752)

    It was discovered that the SCTP protocol implementation in the Linux kernel did not properly verify VTAGs     in some situations. A remote attacker could possibly use this to cause a denial of service (connection     disassociation). (CVE-2021-3772)

    It was discovered that the eBPF implementation in the Linux kernel contained a race condition around read-     only maps. A privileged attacker could use this to modify read-only maps. (CVE-2021-4001)

    It was discovered that the NFS server implementation in the Linux kernel contained an out-of-bounds write     vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2021-4090)

    Felix Wilhelm discovered that the KVM implementation in the Linux kernel did not properly handle exit     events from AMD Secure Encrypted Virtualization-Encrypted State (SEV-ES) guest VMs. An attacker in a guest     VM could use this to cause a denial of service (host kernel crash) or possibly execute arbitrary code in     the host kernel. (CVE-2021-4093)

    Lin Ma discovered that the NFC Controller Interface (NCI) implementation in the Linux kernel contained a     race condition, leading to a use-after-free vulnerability. A local attacker could use this to cause a     denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-4202)

    It was discovered that the AMD Radeon GPU driver in the Linux kernel did not properly validate writes in     the debugfs file system. A privileged attacker could use this to cause a denial of service (system crash)     or possibly execute arbitrary code. (CVE-2021-42327)

    Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel did not properly perform bounds     checking in some situations. A local attacker could use this to cause a denial of service (system crash)     or possibly execute arbitrary code. (CVE-2021-42739)

Tenable has extracted the preceding description block directly from the Ubuntu 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 5.10.82-83.359. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2024-049 advisory.

    A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could     happen if removing device (that is not common to remove video card physically without power-off, but same     happens if unbind the driver). (CVE-2020-27820)

    A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the     way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del()     together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A     privileged local user could use this flaw to crash the system or escalate their privileges on the system.
    (CVE-2021-3640)

    A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP     association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and     the attacker can send packets with spoofed IP addresses. (CVE-2021-3772)

    A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. (CVE-2021-4001)

    A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some     regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the     memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

    A flaw heap buffer overflow in the Linux kernel's AMD Radeon graphics card driver was found in the way     user writes some malicious data to the AMD GPU Display Driver Debug Filesystem (to the VGA sub-directory     of the /sys/kernel/debug/ directory). A local user could use this flaw to crash the system or escalate     their privileges on the system. (CVE-2021-42327)

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

    i40e: Fix NULL ptr dereference on VSI filter sync (CVE-2021-47184)

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

    tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc (CVE-2021-47185)

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

    tipc: check for null after calling kmemdup (CVE-2021-47186)

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

    btrfs: fix memory ordering between normal and ordered work functions (CVE-2021-47189)

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

    perf bpf: Avoid memory leak from perf_env__insert_btf() (CVE-2021-47190)

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

    scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() (CVE-2021-47191)

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

    scsi: core: sysfs: Fix hang when device state is set via sysfs (CVE-2021-47192)

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

    net/mlx5e: nullify cq->dbg pointer in mlx5_debug_cq_remove() (CVE-2021-47197)

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

    iavf: free q_vectors before queues in iavf_disable_vf (CVE-2021-47201)

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

    thermal: Fix NULL pointer dereferences in of_thermal_ functions (CVE-2021-47202)

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

    scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() (CVE-2021-47203)

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

    x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails (CVE-2021-47217)

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

    selinux: fix NULL-pointer dereference when hashtab allocation fails (CVE-2021-47218)

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

    scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs() (CVE-2021-47219)

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

    ext4: fix possible UAF when remounting r/o a mmp-protected file system (CVE-2021-47342)

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

    netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value (CVE-2021-47451)

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

    can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv (CVE-2021-47459)

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

    ocfs2: fix data corruption after conversion from inline format (CVE-2021-47460)

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

    userfaultfd: fix a race between writeprotect and exit_mmap() (CVE-2021-47461)

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

    audit: fix possible null-pointer dereference in audit_filter_rules (CVE-2021-47464)

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

    mm, slub: fix potential memoryleak in kmem_cache_open() (CVE-2021-47466)

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

    scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() (CVE-2021-47473)

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

    isofs: Fix out of bound access for corrupted isofs image (CVE-2021-47478)

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

    scsi: core: Put LLD module refcnt after SCSI device is released (CVE-2021-47480)

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

    regmap: Fix possible double-free in regcache_rbtree_exit() (CVE-2021-47483)

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

    drm/ttm: fix memleak in ttm_transfered_destroy (CVE-2021-47490)

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

    mm: khugepaged: skip huge page collapse for special files (CVE-2021-47491)

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

    mm, thp: bail out early in collapse_file for writeback page (CVE-2021-47492)

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

    usbnet: sanity check for maxpacket (CVE-2021-47495)

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

    net/tls: Fix flipped sign in tls_err_abort() calls (CVE-2021-47496)

    A use-after-free flaw was found in the Linux kernel's Ext4 File System in how a user triggers several file     operations simultaneously with the overlay FS usage. This flaw allows a local user to crash or potentially     escalate their privileges on the system. (CVE-2023-1252)

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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-414546 advisory.

    A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel     versions prior to 5.16 rc2.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

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

An update of the linux package has been released.

ID	Name	Product	Family	Published	Updated	Severity
190057	Amazon Linux 2：内核 (ALASKERNEL-5.4-2022-010)	Nessus	Amazon Linux Local Security Checks	2/6/2024	12/11/2024	high
214927	Amazon Linux 2：内核 (ALASKERNEL-5.4-2025-093)	Nessus	Amazon Linux Local Security Checks	2/4/2025	9/29/2025	high
191192	CentOS 9：kernel-5.14.0-347.el9	Nessus	CentOS Local Security Checks	2/29/2024	9/25/2025	critical
157076	SUSE SLES15 Security Update : kernel (SUSE-SU-2022:0181-1)	Nessus	SuSE Local Security Checks	1/26/2022	7/13/2023	medium
156760	SUSE SLES15 Security Update : kernel (SUSE-SU-2022:0079-1)	Nessus	SuSE Local Security Checks	1/15/2022	7/14/2023	high
156883	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2022:0131-1)	Nessus	SuSE Local Security Checks	1/20/2022	7/14/2023	high
157351	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5265-1)	Nessus	Ubuntu Local Security Checks	2/3/2022	8/28/2024	high
190033	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2024-049)	Nessus	Amazon Linux Local Security Checks	2/6/2024	5/23/2025	high
266946	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-414546)	Nessus	Unity Linux Local Security Checks	10/7/2025	10/7/2025	medium
151965	Photon OS 4.0: Linux PHSA-2021-4.0-0065	Nessus	PhotonOS Local Security Checks	7/22/2021	10/13/2025	high

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