Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - 在低于 4.8.12 的 Linux 内核版本中，arch/x86/kvm/emulate.c 在某些错误情况下未正确初始化代码段 (CS)，本地用户可利用此漏洞，通过构建的应用程序，从内核堆栈内存获取敏感信息。(CVE-2016-9756)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

远程 OracleVM 系统缺少解决关键安全更新的必要补丁：

  - 恢复“x86/mm：扩展异常表逻辑以允许新的处理选项”(Brian Maly) [Orabug：
    25790387] (CVE-2016-9644)

  - 恢复“修复 get_user_ex 中的次要信息泄露”(Brian Maly) [Orabug：25790387] (CVE-2016-9644)

  - x86/mm：扩展异常表逻辑以允许新的处理选项 (Tony Luck) [Orabug：25790387] (CVE-2016-9644)

  - 重新构建升级版本

  - net：ping：检查 ICMP 标头长度的最小大小 (Kees Cook) [Orabug：25766898] (CVE-2016-8399) (CVE-2016-8399)

  - 不适合在 KERNEL_DS 下调用 sg_write/bsg_write (Al Viro) [Orabug：25765436] (CVE-2016-10088)

  - scsi：sg：检查传递给 SG_NEXT_CMD_LEN 的长度 (peter chang) [Orabug：25751984] (CVE-2017-7187)

  - tty：n_hdlc：摆脱 racy n_hdlc.tbuf (Alexander Popov) [Orabug：25696677] (CVE-2017-2636)

  - TTY：n_hdlc，修复 lockdep 假正 (Jiri Slaby) [Orabug：25696677] (CVE-2017-2636)

  - 如果插槽状态指示“数据链路层状态”和“存在检测”中的更改，请优先处理链路状态更改。(Jack Vogel) 

  - PCI：pciehp：启用已启动槽位时，保持电源指示灯亮 (Ashok Raj) [Orabug：25353783]

  - firewire：net：防止 rx 缓冲区溢出 (Stefan Richter) [Orabug：25451520] (CVE-2016-8633)

  - usbnet：探测中的 bind 后清除 (Oliver Neukum) [Orabug：25463898] (CVE-2016-3951)

  - cdc_ncm：请勿从 cdc_ncm_bind 调用 usbnet_link_change (Bj&oslash rn Mork) [Orabug：25463898] (CVE-2016-3951)

  - cdc_ncm：添加支持，以将 NDP 移动至 NCM 框架结尾 (Enrico Mioso) [Orabug：25463898] (CVE-2016-3951)

  - x86/mm/32：在 i386 和 X86_32 中启用完全随机化 (Hector Marco-Gisbert) [Orabug：25463918] (CVE-2016-3672)

  - kvm：修复 handle_vmon 中的页面结构泄露 (Paolo Bonzini) [Orabug：25507133] (CVE-2017-2596)

  - crypto：mcryptd - 检查 mcryptd 算法兼容性 (tim) [Orabug：25507153] (CVE-2016-10147)

  - kvm：nVMX：允许 L1 拦截软件异常 （#BP 和 #OF）(Jim Mattson) [Orabug：25507188] (CVE-2016-9588)

  - KVM：x86：删除 em_jmp_far and em_ret_far 中的错误恢复 (Radim Kr&#x10D m&aacute &#x159) [Orabug：
    25507213] (CVE-2016-9756)

  - tcp：注意由 sk_filter 造成的截断 (Eric Dumazet) [Orabug：25507226] (CVE-2016-8645)

  - rose：限制 sk_filter 修剪以负载 (Willem de Bruijn) [Orabug：25507226] (CVE-2016-8645)

  - tipc：检查最小承载 MTU (Michal Kube&#x10D ek) [Orabug：25507239] (CVE-2016-8632) (CVE-2016-8632)

  - 修复 get_user_ex 中的次要信息泄露 (Al Viro) [Orabug：
    25507269] (CVE-2016-9178)

  - scsi：arcmsr：简化 user_len 检查 (Borislav Petkov) [Orabug：25507319] (CVE-2016-7425)

  - scsi：arcmsr：arcmsr_iop_message_xfer 中存在缓冲区溢出 (Dan Carpenter) [Orabug：25507319] (CVE-2016-7425)

  - tmpfs：设置 posix ACL 时清理 S_ISGID (Gu Zheng) [Orabug：25507341] (CVE-2016-7097) (CVE-2016-7097)

  - posix_acl：设置文件权限时清除 SGID 位 (Jan Kara) [Orabug：25507341] (CVE-2016-7097) (CVE-2016-7097)

  - ext2：转换为 mbcache2 (Jan Kara) [Orabug：25512366] (CVE-2015-8952)

  - ext4：转换为 mbcache2 (Jan Kara) [Orabug：25512366] (CVE-2015-8952)

  - mbcache2：重新实现 mbcache (Jan Kara) [Orabug：
    25512366] (CVE-2015-8952)

  - USB：digi_acceleport：对于端口数量进行健全性检查 (Oliver Neukum) [Orabug：25512466] (CVE-2016-3140)

  - net/llc：避免 skb_orphan 中的 BUG_ON (Eric Dumazet) [Orabug：25682419] (CVE-2017-6345)

  - net/mlx4_core：禁止在 VF 上创建 RAW QP (Eli Cohen) 

  - ipv4：提供 IP 选项时，保留 skb->dst (Eric Dumazet) [Orabug：25698300] (CVE-2017-5970)

  - perf/core：修复并发 sys_perf_event_open 与
    “move_group”争用 (Peter Zijlstra) [Orabug：25698751] (CVE-2017-6001)

  - ip6_gre：修复 ip6gre_err 无效读取 (Eric Dumazet) [Orabug：25699015] (CVE-2017-5897)

  - mpt3sas：如果日志级别为 0，请勿发送垃圾邮件日志 (Johannes Thumshirn) 

  - xen-netfront：首先将授权表引用转换为类型 int (Dongli Zhang)

  - xen-netfront：请勿将授权表引用转换为签名的 short (Dongli Zhang)

在 Linux 内核中发现多个可能导致权限升级、拒绝服务或信息泄漏的漏洞。CVE-2012-6704, CVE-2016-9793 Eric Dumazet 发现拥有 CAP_NET_ADMIN 功能的本地用户可将套接字的缓冲区大小设置为负数，从而造成拒绝服务或其他安全影响。此外，在 kernel 低于 3.5 的版本中，如果将 sysctl net.core.rmem_max 更改为非常大的值，则任何用户均可执行上述操作。CVE-2015-1350 / #770492 Ben Harris 报告说，本地用户可从其可见的任何文件中删除 set-capability 属性，从而允许拒绝服务。CVE-2015-8962 Calvin Owens 发现，在通过 SCSI 通用 (sg) 驱动程序访问某个 SCSI 设备时将其删除会导致双重释放，可能造成拒绝服务（崩溃或内存损坏）或权限升级。有权访问 SCSI 设备节点的本地用户可利用此漏洞。CVE-2015-8963 Sasha Levin 报告，热拔除 CPU 会导致性能事件 (perf) 子系统释放后使用，可能造成拒绝服务（崩溃或内存损坏）或权限升级。任何本地用户均有可能利用此漏洞。CVE-2015-8964 已发现在更改终端线路规则时，终端/串行 (tty) 子系统无法可靠地重置终端缓冲区状态。这可能允许有权访问终端设备的本地用户从内核内存中读取敏感信息。CVE-2016-7097 Jan Kara 发现更改文件的 POSIX ACL 不会清除其 set-group-ID 标志，但在更改文件的用户不是群组所有者的成员时本应清除此标志。在某些情况下，这会允许可执行文件的用户所有者获得群组所有者的权限。CVE-2016-7910 Vegard Nossum 发现在处理读取 /proc/diskstats 或 /proc/partitions 时发生的内存分配失败可能导致释放后使用，从而可能造成拒绝服务（崩溃或内存损坏）或权限升级。CVE-2016-7911 Dmitry Vyukov 报告 ioprio_get() 和 ioprio_set() 系统调用之间的争用可能导致释放后使用，从而可能造成拒绝服务（崩溃）或泄露敏感信息。CVE-2016-7915 Benjamin Tissoires 发现 HID 设备可能触发 HID 核心中的越界内存访问。实际存在用户可利用此问题造成拒绝服务（崩溃）或泄露敏感信息。CVE-2016-8399 Qidan He 报告 IPv4 ping 套接字实现未验证要发送的数据包的长度。有权使用 ping 套接字的用户可造成越界读取，从而可能导致拒绝服务或信息泄露。但是，在 Debian 系统上，默认情况下任何用户均无权创建 ping 套接字。CVE-2016-8633 Eyal Itkin 报告 IP-over-Firewire 驱动程序 (firewire-net) 未验证链路层碎片标头中的偏移量或长度。这允许通过 Firewire 连接的远程系统在数据包缓冲区后写入内存，从而导致拒绝服务（崩溃）或远程执行代码。CVE-2016-8645 Marco Grassi 报告，如果附加到 TCP 套接字的套接字筛选器（BPF 程序）截断或删除 TCP 标头，则可能导致拒绝服务（崩溃）。任何本地用户均可利用此问题。CVE-2016-8655 Philip Pettersson 发现，数据包套接字（AF_PACKET 家族）的实现在启用传输环形缓冲区与更改所用缓冲区版本之间存在争用条件，可能导致释放后使用。具有 CAP_NET_ADMIN 功能的本地用户可利用此问题进行权限升级。CVE-2016-9178 Al Viro 发现无法从用户内存读取数据可能会导致 x86 架构（amd64 或 i386）上发生信息泄露。CVE-2016-9555 Andrey Konovalov 报告 SCTP 实现没有足够早地验证“突发”数据包区块长度。远程系统可利用此问题对使用 SCTP 的系统造成拒绝服务（崩溃）或其他安全影响。CVE-2016-9576, CVE-2016-10088 Dmitry Vyukov 报告将 splice() 与 SCSI 通用驱动程序搭配使用会导致内核内存损坏。有权访问 SCSI 设备节点的本地用户可利用此问题进行权限升级。CVE-2016-9756 Dmitry Vyukov 报告说，x86 架构（amd64 或 i386）的 KVM 无法正确处理某些要求在旧版处理器上进行软件仿真的指令的失败。客户机系统可利用此问题泄露敏感信息或拒绝服务（日志垃圾）。CVE-2016-9794 Baozeng Ding 报告 ALSA（音频）子系统中存在争用条件，可能会导致释放后使用。有权访问 PCM 音频设备的本地用户可利用此问题造成拒绝服务（崩溃或内存损坏）或其他安全影响。对于 Debian 7“Wheezy”，这些问题已在 3.2.84-1 版本中修复。此版本还包括上游版本 3.2.84 的错误修复，并将 PREEMPT_RT 功能集更新为版本 3.2.84-rt122。最后，此版本添加了通过禁止非特权用户使用来缓解性能事件 (perf) 子系统中安全问题的选项。可通过设置 sysctl kernel.perf_event_paranoid = 3 来完成。对于 Debian 8“Jessie”，这些问题已在 3.16.39-1 版本中修复，该版本将包含在下一个点版本 (8.6) 中。建议您升级 linux 程序包。注意：Tenable Network Security 已直接从 DLA 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下，尽可能进行自动整理和排版。

USN-3168-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS.

Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment (CS) in certain error cases. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2016-9756)

Andrey Konovalov discovered that signed integer overflows existed in the setsockopt() system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service (system crash or memory corruption). (CVE-2016-9793)

Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-9794)

Baozeng Ding discovered a double free in the netlink_dump() function in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-9806).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3169-2 advisory.

    USN-3169-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu     14.04 LTS.

    Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the     Code Segment (CS) in certain error cases. A local attacker could use this to expose sensitive information     (kernel memory). (CVE-2016-9756)

    Andrey Konovalov discovered that signed integer overflows existed in the setsockopt() system call when     handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability     could use this to cause a denial of service (system crash or memory corruption). (CVE-2016-9793)

    Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound     Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of     service (system crash). (CVE-2016-9794)

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 4.8.12 stable update contains a number of important fixes across the tree.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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

  - arch/x86/kvm/emulate.c in the Linux kernel before 4.8.12 does not properly initialize Code Segment (CS) in     certain error cases, which allows local users to obtain sensitive information from kernel stack memory via     a crafted application. (CVE-2016-9756)

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

The remote OracleVM system is missing necessary patches to address critical security updates :

  - Revert 'x86/mm: Expand the exception table logic to     allow new handling options' (Brian Maly) [Orabug:
    25790387] (CVE-2016-9644)

  - Revert 'fix minor infoleak in get_user_ex' (Brian Maly)     [Orabug: 25790387] (CVE-2016-9644)

  - x86/mm: Expand the exception table logic to allow new     handling options (Tony Luck) [Orabug: 25790387]     (CVE-2016-9644)

  - rebuild bumping release

  - net: ping: check minimum size on ICMP header length     (Kees Cook) [Orabug: 25766898] (CVE-2016-8399)     (CVE-2016-8399)

  - sg_write/bsg_write is not fit to be called under     KERNEL_DS (Al Viro) [Orabug: 25765436] (CVE-2016-10088)

  - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter     chang) [Orabug: 25751984] (CVE-2017-7187)

  - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander     Popov) [Orabug: 25696677] (CVE-2017-2636)

  - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby)     [Orabug: 25696677] (CVE-2017-2636)

  - If Slot Status indicates changes in both Data Link Layer     Status and Presence Detect, prioritize the Link status     change. (Jack Vogel) 

  - PCI: pciehp: Leave power indicator on when enabling     already-enabled slot (Ashok Raj) [Orabug: 25353783]

  - firewire: net: guard against rx buffer overflows (Stefan     Richter) [Orabug: 25451520] (CVE-2016-8633)

  - usbnet: cleanup after bind in probe (Oliver Neukum)     [Orabug: 25463898] (CVE-2016-3951)

  - cdc_ncm: do not call usbnet_link_change from     cdc_ncm_bind (Bj&oslash rn Mork) [Orabug: 25463898]     (CVE-2016-3951)

  - cdc_ncm: Add support for moving NDP to end of NCM frame     (Enrico Mioso) [Orabug: 25463898] (CVE-2016-3951)

  - x86/mm/32: Enable full randomization on i386 and X86_32     (Hector Marco-Gisbert) [Orabug: 25463918]     (CVE-2016-3672)

  - kvm: fix page struct leak in handle_vmon (Paolo Bonzini)     [Orabug: 25507133] (CVE-2017-2596)

  - crypto: mcryptd - Check mcryptd algorithm compatibility     (tim) [Orabug: 25507153] (CVE-2016-10147)

  - kvm: nVMX: Allow L1 to intercept software exceptions     (#BP and #OF) (Jim Mattson) [Orabug: 25507188]     (CVE-2016-9588)

  - KVM: x86: drop error recovery in em_jmp_far and     em_ret_far (Radim Kr&#x10D m&aacute &#x159 ) [Orabug:
    25507213] (CVE-2016-9756)

  - tcp: take care of truncations done by sk_filter (Eric     Dumazet) [Orabug: 25507226] (CVE-2016-8645)

  - rose: limit sk_filter trim to payload (Willem de Bruijn)     [Orabug: 25507226] (CVE-2016-8645)

  - tipc: check minimum bearer MTU (Michal Kube&#x10D ek)     [Orabug: 25507239] (CVE-2016-8632) (CVE-2016-8632)

  - fix minor infoleak in get_user_ex (Al Viro) [Orabug:
    25507269] (CVE-2016-9178)

  - scsi: arcmsr: Simplify user_len checking (Borislav     Petkov) [Orabug: 25507319] (CVE-2016-7425)

  - scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer     (Dan Carpenter) [Orabug: 25507319] (CVE-2016-7425)

  - tmpfs: clear S_ISGID when setting posix ACLs (Gu Zheng)     [Orabug: 25507341] (CVE-2016-7097) (CVE-2016-7097)

  - posix_acl: Clear SGID bit when setting file permissions     (Jan Kara) [Orabug: 25507341] (CVE-2016-7097)     (CVE-2016-7097)

  - ext2: convert to mbcache2 (Jan Kara) [Orabug: 25512366]     (CVE-2015-8952)

  - ext4: convert to mbcache2 (Jan Kara) [Orabug: 25512366]     (CVE-2015-8952)

  - mbcache2: reimplement mbcache (Jan Kara) [Orabug:
    25512366] (CVE-2015-8952)

  - USB: digi_acceleport: do sanity checking for the number     of ports (Oliver Neukum) [Orabug: 25512466]     (CVE-2016-3140)

  - net/llc: avoid BUG_ON in skb_orphan (Eric Dumazet)     [Orabug: 25682419] (CVE-2017-6345)

  - net/mlx4_core: Disallow creation of RAW QPs on a VF (Eli     Cohen) 

  - ipv4: keep skb->dst around in presence of IP options     (Eric Dumazet) [Orabug: 25698300] (CVE-2017-5970)

  - perf/core: Fix concurrent sys_perf_event_open vs.
    'move_group' race (Peter Zijlstra) [Orabug: 25698751]     (CVE-2017-6001)

  - ip6_gre: fix ip6gre_err invalid reads (Eric Dumazet)     [Orabug: 25699015] (CVE-2017-5897)

  - mpt3sas: Don't spam logs if logging level is 0 (Johannes     Thumshirn) 

  - xen-netfront: cast grant table reference first to type     int (Dongli Zhang)

  - xen-netfront: do not cast grant table reference to     signed short (Dongli Zhang)

The SUSE Linux Enterprise 12 GA LTSS kernel was updated to 3.12.61 to receive various security and bugfixes. The following feature was implemented :

  - The ext2 filesystem got reenabled and supported to allow     support for 'XIP' (Execute In Place) (FATE#320805). The     following security bugs were fixed :

  - CVE-2017-5551: The tmpfs filesystem implementation in     the Linux kernel preserved the setgid bit during a     setxattr call, which allowed local users to gain group     privileges by leveraging the existence of a setgid     program with restrictions on execute permissions     (bsc#1021258).

  - CVE-2016-7097: The filesystem implementation in the     Linux kernel preserved the setgid bit during a setxattr     call, which allowed local users to gain group privileges     by leveraging the existence of a setgid program with     restrictions on execute permissions (bnc#995968).

  - CVE-2017-2583: A Linux kernel built with the     Kernel-based Virtual Machine (CONFIG_KVM) support was     vulnerable to an incorrect segment selector(SS) value     error. A user/process inside guest could have used this     flaw to crash the guest resulting in DoS or potentially     escalate their privileges inside guest. (bsc#1020602).

  - CVE-2017-2584: arch/x86/kvm/emulate.c in the Linux     kernel allowed local users to obtain sensitive     information from kernel memory or cause a denial of     service (use-after-free) via a crafted application that     leverages instruction emulation for fxrstor, fxsave,     sgdt, and sidt (bnc#1019851).

  - CVE-2016-10088: The sg implementation in the Linux     kernel did not properly restrict write operations in     situations where the KERNEL_DS option is set, which     allowed local users to read or write to arbitrary kernel     memory locations or cause a denial of service     (use-after-free) by leveraging access to a /dev/sg     device, related to block/bsg.c and drivers/scsi/sg.c.
    NOTE: this vulnerability exists because of an incomplete     fix for CVE-2016-9576 (bnc#1017710).

  - CVE-2016-8645: The TCP stack in the Linux kernel     mishandled skb truncation, which allowed local users to     cause a denial of service (system crash) via a crafted     application that made sendto system calls, related to     net/ipv4/tcp_ipv4.c and net/ipv6/tcp_ipv6.c     (bnc#1009969).

  - CVE-2016-8399: An elevation of privilege vulnerability     in the kernel networking subsystem could enable a local     malicious application to execute arbitrary code within     the context of the kernel. This issue is rated as     Moderate because it first requires compromising a     privileged process and current compiler optimizations     restrict access to the vulnerable code. Product:
    Android. Versions: Kernel-3.10, Kernel-3.18. Android ID:
    A-31349935 (bnc#1014746).

  - CVE-2016-9806: Race condition in the netlink_dump     function in net/netlink/af_netlink.c in the Linux kernel     allowed local users to cause a denial of service (double     free) or possibly have unspecified other impact via a     crafted application that made sendmsg system calls,     leading to a free operation associated with a new dump     that started earlier than anticipated (bnc#1013540).

  - CVE-2016-9756: arch/x86/kvm/emulate.c in the Linux     kernel did not properly initialize Code Segment (CS) in     certain error cases, which allowed local users to obtain     sensitive information from kernel stack memory via a     crafted application (bnc#1013038).

  - CVE-2016-9793: The sock_setsockopt function in     net/core/sock.c in the Linux kernel mishandled negative     values of sk_sndbuf and sk_rcvbuf, which allowed local     users to cause a denial of service (memory corruption     and system crash) or possibly have unspecified other     impact by leveraging the CAP_NET_ADMIN capability for a     crafted setsockopt system call with the (1)     SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option     (bnc#1013531).

  - CVE-2016-7910: Use-after-free vulnerability in the     disk_seqf_stop function in block/genhd.c in the Linux     kernel allowed local users to gain privileges by     leveraging the execution of a certain stop operation     even if the corresponding start operation had failed     (bnc#1010716).

  - CVE-2015-8962: Double free vulnerability in the     sg_common_write function in drivers/scsi/sg.c in the     Linux kernel allowed local users to gain privileges or     cause a denial of service (memory corruption and system     crash) by detaching a device during an SG_IO ioctl call     (bnc#1010501).

  - CVE-2016-7913: The xc2028_set_config function in     drivers/media/tuners/tuner-xc2028.c in the Linux kernel     allowed local users to gain privileges or cause a denial     of service (use-after-free) via vectors involving     omission of the firmware name from a certain data     structure (bnc#1010478).

  - CVE-2016-7911: Race condition in the get_task_ioprio     function in block/ioprio.c in the Linux kernel allowed     local users to gain privileges or cause a denial of     service (use-after-free) via a crafted ioprio_get system     call (bnc#1010711).

  - CVE-2015-8964: The tty_set_termios_ldisc function in     drivers/tty/tty_ldisc.c in the Linux kernel allowed     local users to obtain sensitive information from kernel     memory by reading a tty data structure (bnc#1010507).

  - CVE-2015-8963: Race condition in kernel/events/core.c in     the Linux kernel allowed local users to gain privileges     or cause a denial of service (use-after-free) by     leveraging incorrect handling of an swevent data     structure during a CPU unplug operation (bnc#1010502).

  - CVE-2016-7914: The assoc_array_insert_into_terminal_node     function in lib/assoc_array.c in the Linux kernel did     not check whether a slot is a leaf, which allowed local     users to obtain sensitive information from kernel memory     or cause a denial of service (invalid pointer     dereference and out-of-bounds read) via an application     that uses associative-array data structures, as     demonstrated by the keyutils test suite (bnc#1010475).

  - CVE-2016-8633: drivers/firewire/net.c in the Linux     kernel allowed remote attackers to execute arbitrary     code via crafted fragmented packets (bnc#1008833).

  - CVE-2016-9083: drivers/vfio/pci/vfio_pci.c in the Linux     kernel allowed local users to bypass integer overflow     checks, and cause a denial of service (memory     corruption) or have unspecified other impact, by     leveraging access to a vfio PCI device file for a     VFIO_DEVICE_SET_IRQS ioctl call, aka a 'state machine     confusion bug (bnc#1007197).

  - CVE-2016-9084: drivers/vfio/pci/vfio_pci_intrs.c in the     Linux kernel misused the kzalloc function, which allowed     local users to cause a denial of service (integer     overflow) or have unspecified other impact by leveraging     access to a vfio PCI device file (bnc#1007197).

  - CVE-2016-7042: The proc_keys_show function in     security/keys/proc.c in the Linux kernel uses an     incorrect buffer size for certain timeout data, which     allowed local users to cause a denial of service (stack     memory corruption and panic) by reading the /proc/keys     file (bnc#1004517).

  - CVE-2015-8956: The rfcomm_sock_bind function in     net/bluetooth/rfcomm/sock.c in the Linux kernel allowed     local users to obtain sensitive information or cause a     denial of service (NULL pointer dereference) via vectors     involving a bind system call on a Bluetooth RFCOMM     socket (bnc#1003925).

  - CVE-2016-8658: Stack-based buffer overflow in the     brcmf_cfg80211_start_ap function in     drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg8021     1.c in the Linux kernel allowed local users to cause a     denial of service (system crash) or possibly have     unspecified other impact via a long SSID Information     Element in a command to a Netlink socket (bnc#1004462).

  - CVE-2016-7425: The arcmsr_iop_message_xfer function in     drivers/scsi/arcmsr/arcmsr_hba.c in the Linux kernel did     not restrict a certain length field, which allowed local     users to gain privileges or cause a denial of service     (heap-based buffer overflow) via an     ARCMSR_MESSAGE_WRITE_WQBUFFER control code (bnc#999932).

  - CVE-2016-6327: drivers/infiniband/ulp/srpt/ib_srpt.c in     the Linux kernel allowed local users to cause a denial     of service (NULL pointer dereference and system crash)     by using an ABORT_TASK command to abort a device write     operation (bnc#994748).

  - CVE-2016-6828: The tcp_check_send_head function in     include/net/tcp.h in the Linux kernel did not properly     maintain certain SACK state after a failed data copy,     which allowed local users to cause a denial of service     (tcp_xmit_retransmit_queue use-after-free and system     crash) via a crafted SACK option (bnc#994296).

  - CVE-2016-5696: net/ipv4/tcp_input.c in the Linux kernel     did not properly determine the rate of challenge ACK     segments, which made it easier for remote attackers to     hijack TCP sessions via a blind in-window attack     (bnc#989152).

  - CVE-2016-6130: Race condition in the sclp_ctl_ioctl_sccb     function in drivers/s390/char/sclp_ctl.c in the Linux     kernel allowed local users to obtain sensitive     information from kernel memory by changing a certain     length value, aka a 'double fetch' vulnerability     (bnc#987542).

  - CVE-2016-6480: Race condition in the ioctl_send_fib     function in drivers/scsi/aacraid/commctrl.c in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds access or system crash) by changing a     certain size value, aka a 'double fetch' vulnerability     (bnc#991608).

  - CVE-2016-4998: The IPT_SO_SET_REPLACE setsockopt     implementation in the netfilter subsystem in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds read) or possibly obtain sensitive     information from kernel heap memory by leveraging     in-container root access to provide a crafted offset     value that leads to crossing a ruleset blob boundary     (bnc#986362 bnc#986365).

  - CVE-2016-5828: The start_thread function in     arch/powerpc/kernel/process.c in the Linux kernel on     powerpc platforms mishandled transactional state, which     allowed local users to cause a denial of service     (invalid process state or TM Bad Thing exception, and     system crash) or possibly have unspecified other impact     by starting and suspending a transaction before an exec     system call (bnc#986569).

  - CVE-2014-9904: The snd_compress_check_input function in     sound/core/compress_offload.c in the ALSA subsystem in     the Linux kernel did not properly check for an integer     overflow, which allowed local users to cause a denial of     service (insufficient memory allocation) or possibly     have unspecified other impact via a crafted     SNDRV_COMPRESS_SET_PARAMS ioctl call (bnc#986811).

  - CVE-2016-5829: Multiple heap-based buffer overflows in     the hiddev_ioctl_usage function in     drivers/hid/usbhid/hiddev.c in the Linux kernel allow     local users to cause a denial of service or possibly     have unspecified other impact via a crafted (1)     HIDIOCGUSAGES or (2) HIDIOCSUSAGES ioctl call     (bnc#986572).

  - CVE-2016-4470: The key_reject_and_link function in     security/keys/key.c in the Linux kernel did not ensure     that a certain data structure is initialized, which     allowed local users to cause a denial of service (system     crash) via vectors involving a crafted keyctl request2     command (bnc#984755).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

CVE-2012-6704, CVE-2016-9793

Eric Dumazet found that a local user with CAP_NET_ADMIN capability could set a socket's buffer size to be negative, leading to a denial of service or other security impact. Additionally, in kernel versions prior to 3.5, any user could do this if sysctl net.core.rmem_max was changed to a very large value.

CVE-2015-1350 / #770492

Ben Harris reported that local users could remove set-capability attributes from any file visible to them, allowing a denial of service.

CVE-2015-8962

Calvin Owens fouund that removing a SCSI device while it was being accessed through the SCSI generic (sg) driver led to a double- free, possibly causing a denial of service (crash or memory corruption) or privilege escalation. This could be exploited by local users with permision to access a SCSI device node.

CVE-2015-8963

Sasha Levin reported that hot-unplugging a CPU resulted in a use-after-free by the performance events (perf) subsystem, possibly causing a denial of service (crash or memory corruption) or privilege escalation. This could by exploited by any local user.

CVE-2015-8964

It was found that the terminal/serial (tty) subsystem did not reliably reset the terminal buffer state when the terminal line discipline was changed. This could allow a local user with access to a terminal device to read sensitive information from kernel memory.

CVE-2016-7097

Jan Kara found that changing the POSIX ACL of a file never cleared its set-group-ID flag, which should be done if the user changing it is not a member of the group-owner. In some cases, this would allow the user-owner of an executable to gain the privileges of the group-owner.

CVE-2016-7910

Vegard Nossum discovered that a memory allocation failure while handling a read of /proc/diskstats or /proc/partitions could lead to a use-after-free, possibly causing a denial of service (crash or memory corruption) or privilege escalation.

CVE-2016-7911

Dmitry Vyukov reported that a race between ioprio_get() and ioprio_set() system calls could result in a use-after-free, possibly causing a denial of service (crash) or leaking sensitive information.

CVE-2016-7915

Benjamin Tissoires found that HID devices could trigger an out-of- bounds memory access in the HID core. A physically present user could possibly use this for denial of service (crash) or to leak sensitive information.

CVE-2016-8399

Qidan He reported that the IPv4 ping socket implementation did not validate the length of packets to be sent. A user with permisson to use ping sockets could cause an out-of-bounds read, possibly resulting in a denial of service or information leak. However, on Debian systems no users have permission to create ping sockets by default.

CVE-2016-8633

Eyal Itkin reported that the IP-over-Firewire driver (firewire-net) did not validate the offset or length in link-layer fragmentation headers. This allowed a remote system connected by Firewire to write to memory after a packet buffer, leading to a denial of service (crash) or remote code execution.

CVE-2016-8645

Marco Grassi reported that if a socket filter (BPF program) attached to a TCP socket truncates or removes the TCP header, this could cause a denial of service (crash). This was exploitable by any local user.

CVE-2016-8655

Philip Pettersson found that the implementation of packet sockets (AF_PACKET family) had a race condition between enabling a transmit ring buffer and changing the version of buffers used, which could result in a use-after-free. A local user with the CAP_NET_ADMIN capability could exploit this for privilege escalation.

CVE-2016-9178

Al Viro found that a failure to read data from user memory might lead to a information leak on the x86 architecture (amd64 or i386).

CVE-2016-9555

Andrey Konovalov reported that the SCTP implementation does not validate 'out of the blue' packet chunk lengths early enough. A remote system able could use this to cause a denial of service (crash) or other security impact for systems using SCTP.

CVE-2016-9576, CVE-2016-10088

Dmitry Vyukov reported that using splice() with the SCSI generic driver led to kernel memory corruption. Local users with permision to access a SCSI device node could exploit this for privilege escalation.

CVE-2016-9756

Dmitry Vyukov reported that KVM for the x86 architecture (amd64 or i386) did not correctly handle the failure of certain instructions that require software emulation on older processors. This could be exploited by guest systems to leak sensitive information or for denial of service (log spam).

CVE-2016-9794

Baozeng Ding reported a race condition in the ALSA (sound) subsystem that could result in a use-after-free. Local users with access to a PCM sound device could exploit this for denial of service (crash or memory corruption) or other security impact.

For Debian 7 'Wheezy', these problems have been fixed in version 3.2.84-1. This version also includes bug fixes from upstream version 3.2.84 and updates the PREEMPT_RT featureset to version 3.2.84-rt122.
Finally, this version adds the option to mitigate security issues in the performance events (perf) subsystem by disabling use by unprivileged users. This can be done by setting sysctl kernel.perf_event_paranoid=3.

For Debian 8 'Jessie', these problems have been fixed in version 3.16.39-1 which will be included in the next point release (8.6).

We recommend that you upgrade your linux packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
220305	Linux Distros 未修补的漏洞: CVE-2016-9756	Nessus	Misc.	3/4/2025	8/15/2025	medium
99162	OracleVM 3.4：Unbreakable / 等 (OVMSA-2017-0056)	Nessus	OracleVM Local Security Checks	4/3/2017	1/4/2021	critical
96188	Debian DLA-772-1：linux 安全更新	Nessus	Debian Local Security Checks	1/3/2017	1/11/2021	critical
96438	Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-3168-2)	Nessus	Ubuntu Local Security Checks	1/12/2017	1/12/2023	high
96440	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3169-2)	Nessus	Ubuntu Local Security Checks	1/12/2017	8/27/2024	high
95680	Fedora 23 : kernel (2016-9c17cb9648)	Nessus	Fedora Local Security Checks	12/12/2016	1/11/2021	high
220305	Linux Distros Unpatched Vulnerability : CVE-2016-9756	Nessus	Misc.	3/4/2025	8/15/2025	medium
99162	OracleVM 3.4 : Unbreakable / etc (OVMSA-2017-0056)	Nessus	OracleVM Local Security Checks	4/3/2017	1/4/2021	critical
97205	SUSE SLES12 Security Update : kernel (SUSE-SU-2017:0471-1)	Nessus	SuSE Local Security Checks	2/16/2017	1/6/2021	high
96188	Debian DLA-772-1 : linux security update	Nessus	Debian Local Security Checks	1/3/2017	1/11/2021	critical

Detections

Analytics

Plugins Search

medium

critical

critical

high

high

high

medium

critical

high

critical