更新后的 kernel-rt 程序包修复了若干安全问题和多个缺陷，现在可用于 Red Hat Enterprise MRG 2.3。

Red Hat 安全响应团队已将此更新评级为具有重要安全影响。可从“参考”部分中的 CVE 链接获取针对每个漏洞的通用漏洞评分系统 (CVSS) 基本分数，其给出了详细的严重性等级。

kernel-rt 程序包包含 Linux 内核，后者是任何 Linux 操作系统的核心。

此更新修复了以下安全问题：

* 在 Linux 内核的 iSCSI 目标系统中发现一个基于堆的缓冲区溢出缺陷。远程攻击者可使用特别构建的 iSCSI 请求在系统上造成拒绝服务或者可能升级其在该系统上的权限。（CVE-2013-2850，重要）

* 在 Linux 内核的性能事件实现中发现一个缺陷。在拥有某些 Intel 处理器的系统中，本地非特权用户可利用此缺陷，通过利用 perf 子系统写入 OFFCORE_RSP_0 and OFFCORE_RSP_1 模块特定寄存器的预留位造成拒绝服务。
（CVE-2013-2146，中危）

* 在 Linux 内核的 TCP/IP 协议套件实现中发现无效指针取消引用缺陷。本地非特权用户可利用此缺陷使系统崩溃，或可能通过利用 sendmsg()（带有连接至 IPv4 目标的 IPv6 套接字）升级其在系统中的权限。（CVE-2013-2232，中危）

* 在 Linux 内核的 TCP/IP 协议套件实现处理使用了 UDP_CORK 选项的 IPv6 套接字的方式中发现两个缺陷。本地非特权用户可以使用这些缺陷造成拒绝服务。（CVE-2013-4162、CVE-2013-4163，中危）

* 在 Linux 内核的 Chipidea USB 驱动程序中发现一个缺陷。本地非特权用户可利用此缺陷造成拒绝服务。
（CVE-2013-2058，低危）

* Linux 内核中的信息泄漏缺陷可允许本地特权用户将内核内存泄漏给用户空间。（CVE-2013-2147、CVE-2013-2164、CVE-2013-2234、CVE-2013-2237，低危）

* Linux 内核中的信息泄漏缺陷可允许本地非特权用户将内核内存泄漏给用户空间。（CVE-2013-2141、CVE-2013-2148，低危）

* 在 Linux 内核的区块层中发现一个格式字符串缺陷。本地特权用户可能利用此缺陷升级其对内核级 (ring0) 的权限。（CVE-2013-2851，低危）

* 已发现 Linux 内核 b43 驱动程序实现的 b43_do_request_fw() 函数中存在格式字符串缺陷。能够指定“fwpostfix”b43 模块参数的本地用户可利用此缺陷造成拒绝服务或可能升级其权限。（CVE-2013-2852，低危）

* 已发现 Linux 内核的 ftrace 和函数跟踪器实现中存在空指针取消引用缺陷。拥有 CAP_SYS_ADMIN 功能的本地用户可利用此缺陷造成拒绝服务。（CVE-2013-3301，低危）

Red Hat 在此感谢 Kees Cook 报告 CVE-2013-2850、CVE-2013-2851 和 CVE-2013-2852，感谢 Hannes Frederic Sowa 报告 CVE-2013-4162 和 CVE-2013-4163。

此更新还修复以下缺陷：

* 以下驱动程序已更新，修复了许多缺陷：myri10ge、bna、enic、mlx4、bgmac、bcma、cxgb3、cxgb4、qlcnic、r8169、be2net、e100、e1000、e1000e、igb、ixgbe、brcm80211、cpsw、pch_gbe、bfin_mac、bnx2x、bnx2、cnic、tg3 和 sfc。(BZ#974138)

* 构建的 realtime 内核不启用 CONFIG_NET_DROP_WATCH 内核配置选项。因此，尝试运行 dropwatch 命令会导致以下错误：

Unable to find NET_DM family, dropwatch can't work Cleaning up on socket creation error

通过此更新，构建的 realtime 内核将包含 CONFIG_NET_DROP_WATCH 选项，允许 dropwatch 按预期方式工作。
(BZ#979417)

用户应升级这些更新后的程序包，其中将 kernel-rt 内核升级到版本 kernel-rt-3.6.11.5-rt37 并修正了上述问题。必须重新启动系统才能使此更新生效。

远程 OracleVM 系统缺少处理关键安全更新所需的补丁：有关详细信息，请参阅 Oracle VM 安全公告 OVMSA-2017-0057。

The Linux kernel was updated to 3.4.63, fixing various bugs and security issues.

  - Linux 3.4.59 (CVE-2013-2237 bnc#828119).

  - Linux 3.4.57 (CVE-2013-2148 bnc#823517).

  - Linux 3.4.55 (CVE-2013-2232 CVE-2013-2234 CVE-2013-4162     CVE-2013-4163 bnc#827749 bnc#827750 bnc#831055     bnc#831058).

  - Drivers: hv: util: Fix a bug in util version negotiation     code (bnc#838346).

  - vmxnet3: prevent div-by-zero panic when ring resizing     uninitialized dev (bnc#833321).

  - bnx2x: protect different statistics flows (bnc#814336).

  - bnx2x: Avoid sending multiple statistics queries     (bnc#814336).

  - Drivers: hv: util: Fix a bug in version negotiation code     for util services (bnc#828714).

  - Update Xen patches to 3.4.53.

  - netfront: fix kABI after 'reduce gso_max_size to account     for max TCP header'.

  - netback: don't disconnect frontend when seeing oversize     packet (bnc#823342).

  - netfront: reduce gso_max_size to account for max TCP     header.

  - backends: Check for insane amounts of requests on the     ring.

  - reiserfs: Fixed double unlock in reiserfs_setattr     failure path.

  - reiserfs: locking, release lock around quota operations     (bnc#815320).

  - reiserfs: locking, handle nested locks properly     (bnc#815320).

  - reiserfs: locking, push write lock out of xattr code     (bnc#815320).

  - ipv6: ip6_append_data_mtu did not care about pmtudisc     and frag_size (bnc#831055, CVE-2013-4163).

  - af_key: fix info leaks in notify messages (bnc#827749     CVE-2013-2234).

  - af_key: initialize satype in key_notify_policy_flush()     (bnc#828119 CVE-2013-2237).

  - ipv6: call udp_push_pending_frames when uncorking a     socket with (bnc#831058, CVE-2013-4162).

  - ipv6: ip6_sk_dst_check() must not assume ipv6 dst.

  - xfs: fix _xfs_buf_find oops on blocks beyond the     filesystem end (CVE-2013-1819 bnc#807471).

  - brcmsmac: don't start device when RfKill is engaged     (bnc#787649).

  - CIFS: Protect i_nlink from being negative (bnc#785542     bnc#789598).

  - cifs: don't compare uniqueids in cifs_prime_dcache     unless server inode numbers are in use (bnc#794988).

  - xfs: xfs: fallback to vmalloc for large buffers in     xfs_compat_attrlist_by_handle (bnc#818053 bnc#807153).

  - xfs: fallback to vmalloc for large buffers in     xfs_attrlist_by_handle (bnc#818053 bnc#807153).

  - Linux 3.4.53 (CVE-2013-2164 CVE-2013-2851 bnc#822575     bnc#824295).

  - drivers/cdrom/cdrom.c: use kzalloc() for failing     hardware (bnc#824295, CVE-2013-2164).

  - fanotify: info leak in copy_event_to_user()     (CVE-2013-2148 bnc#823517).

  - block: do not pass disk names as format strings     (bnc#822575 CVE-2013-2851).

  - ext4: avoid hang when mounting non-journal filesystems     with orphan list (bnc#817377).

  - Linux 3.4.49 (CVE-2013-0231 XSA-43 bnc#801178).

  - Linux 3.4.48 (CVE-2013-1774 CVE-2013-2850 bnc#806976     bnc#821560).

  - Always include the git commit in KOTD builds This allows     us not to set it explicitly in builds submitted to the     official distribution (bnc#821612, bnc#824171).

  - Bluetooth: Really fix registering hci with duplicate     name (bnc#783858).

  - Bluetooth: Fix registering hci with duplicate name     (bnc#783858).

Updated kernel-rt packages that fix several security issues and multiple bugs are now available for Red Hat Enterprise MRG 2.3.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

This update fixes the following security issues :

* A heap-based buffer overflow flaw was found in the Linux kernel's iSCSI target subsystem. A remote attacker could use a specially crafted iSCSI request to cause a denial of service on a system or, potentially, escalate their privileges on that system. (CVE-2013-2850, Important)

* A flaw was found in the Linux kernel's Performance Events implementation. On systems with certain Intel processors, a local, unprivileged user could use this flaw to cause a denial of service by leveraging the perf subsystem to write into the reserved bits of the OFFCORE_RSP_0 and OFFCORE_RSP_1 model-specific registers.
(CVE-2013-2146, Moderate)

* An invalid pointer dereference flaw was found in the Linux kernel's TCP/IP protocol suite implementation. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system by using sendmsg() with an IPv6 socket connected to an IPv4 destination. (CVE-2013-2232, Moderate)

* Two flaws were found in the way the Linux kernel's TCP/IP protocol suite implementation handled IPv6 sockets that used the UDP_CORK option. A local, unprivileged user could use these flaws to cause a denial of service. (CVE-2013-4162, CVE-2013-4163, Moderate)

* A flaw was found in the Linux kernel's Chipidea USB driver. A local, unprivileged user could use this flaw to cause a denial of service.
(CVE-2013-2058, Low)

* Information leak flaws in the Linux kernel could allow a privileged, local user to leak kernel memory to user-space. (CVE-2013-2147, CVE-2013-2164, CVE-2013-2234, CVE-2013-2237, Low)

* Information leak flaws in the Linux kernel could allow a local, unprivileged user to leak kernel memory to user-space. (CVE-2013-2141, CVE-2013-2148, Low)

* A format string flaw was found in the Linux kernel's block layer. A privileged, local user could potentially use this flaw to escalate their privileges to kernel level (ring0). (CVE-2013-2851, Low)

* A format string flaw was found in the b43_do_request_fw() function in the Linux kernel's b43 driver implementation. A local user who is able to specify the 'fwpostfix' b43 module parameter could use this flaw to cause a denial of service or, potentially, escalate their privileges. (CVE-2013-2852, Low)

* A NULL pointer dereference flaw was found in the Linux kernel's ftrace and function tracer implementations. A local user who has the CAP_SYS_ADMIN capability could use this flaw to cause a denial of service. (CVE-2013-3301, Low)

Red Hat would like to thank Kees Cook for reporting CVE-2013-2850, CVE-2013-2851, and CVE-2013-2852; and Hannes Frederic Sowa for reporting CVE-2013-4162 and CVE-2013-4163.

This update also fixes the following bugs :

* The following drivers have been updated, fixing a number of bugs:
myri10ge, bna, enic, mlx4, bgmac, bcma, cxgb3, cxgb4, qlcnic, r8169, be2net, e100, e1000, e1000e, igb, ixgbe, brcm80211, cpsw, pch_gbe, bfin_mac, bnx2x, bnx2, cnic, tg3, and sfc. (BZ#974138)

* The realtime kernel was not built with the CONFIG_NET_DROP_WATCH kernel configuration option enabled. As such, attempting to run the dropwatch command resulted in the following error :

Unable to find NET_DM family, dropwatch can't work Cleaning up on socket creation error

With this update, the realtime kernel is built with the CONFIG_NET_DROP_WATCH option, allowing dropwatch to work as expected.
(BZ#979417)

Users should upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.6.11.5-rt37, and correct these issues. The system must be rebooted for this update to take effect.

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

  - net/ceph/auth_none.c in the Linux kernel through 3.10     allows remote attackers to cause a denial of service     (NULL pointer dereference and system crash) or possibly     have unspecified other impact via an auth_reply message     that triggers an attempted build_request     operation.(CVE-2013-1059)

  - The dispatch_discard_io function in     drivers/block/xen-blkback/blkback.c in the Xen blkback     implementation in the Linux kernel before 3.10.5 allows     guest OS users to cause a denial of service (data loss)     via filesystem write operations on a read-only disk     that supports the (1) BLKIF_OP_DISCARD (aka discard or     TRIM) or (2) SCSI UNMAP feature.(CVE-2013-2140)

  - The mmc_ioctl_cdrom_read_data function in     drivers/cdrom/cdrom.c in the Linux kernel through 3.10     allows local users to obtain sensitive information from     kernel memory via a read operation on a malfunctioning     CD-ROM drive.(CVE-2013-2164)

  - Multiple array index errors in drivers/hid/hid-core.c     in the Human Interface Device (HID) subsystem in the     Linux kernel through 3.11 allow physically proximate     attackers to execute arbitrary code or cause a denial     of service (heap memory corruption) via a crafted     device that provides an invalid Report     ID.(CVE-2013-2888)

  - drivers/hid/hid-zpff.c in the Human Interface Device     (HID) subsystem in the Linux kernel through 3.11, when     CONFIG_HID_ZEROPLUS is enabled, allows physically     proximate attackers to cause a denial of service     (heap-based out-of-bounds write) via a crafted     device.(CVE-2013-2889)

  - drivers/hid/hid-pl.c in the Human Interface Device     (HID) subsystem in the Linux kernel through 3.11, when     CONFIG_HID_PANTHERLORD is enabled, allows physically     proximate attackers to cause a denial of service     (heap-based out-of-bounds write) via a crafted     device.(CVE-2013-2892)

  - A flaw was found in the way the get_dumpable() function     return value was interpreted in the ptrace subsystem of     the Linux kernel. When 'fs.suid_dumpable' was set to 2,     a local, unprivileged local user could use this flaw to     bypass intended ptrace restrictions and obtain     potentially sensitive information.(CVE-2013-2929)

  - The perf_trace_event_perm function in     kernel/trace/trace_event_perf.c in the Linux kernel     before 3.12.2 does not properly restrict access to the     perf subsystem, which allows local users to enable     function tracing via a crafted     application.(CVE-2013-2930)

  - The fib6_add_rt2node function in net/ipv6/ip6_fib.c in     the IPv6 stack in the Linux kernel through 3.10.1 does     not properly handle Router Advertisement (RA) messages     in certain circumstances involving three routes that     initially qualified for membership in an ECMP route set     until a change occurred for one of the first two     routes, which allows remote attackers to cause a denial     of service (system crash) via a crafted sequence of     messages.(CVE-2013-4125)

  - Use-after-free vulnerability in the     vhost_net_set_backend function in drivers/vhost/net.c     in the Linux kernel through 3.10.3 allows local users     to cause a denial of service (OOPS and system crash)     via vectors involving powering on a virtual     machine.(CVE-2013-4127)

  - The udp_v6_push_pending_frames function in     net/ipv6/udp.c in the IPv6 implementation in the Linux     kernel through 3.10.3 makes an incorrect function call     for pending data, which allows local users to cause a     denial of service (BUG and system crash) via a crafted     application that uses the UDP_CORK option in a     setsockopt system call.(CVE-2013-4162)

  - The ip6_append_data_mtu function in     net/ipv6/ip6_output.c in the IPv6 implementation in the     Linux kernel through 3.10.3 does not properly maintain     information about whether the IPV6_MTU setsockopt     option had been specified, which allows local users to     cause a denial of service (BUG and system crash) via a     crafted application that uses the UDP_CORK option in a     setsockopt system call.(CVE-2013-4163)

  - Memory leak in the unshare_userns function in     kernel/user_namespace.c in the Linux kernel before     3.10.6 allows local users to cause a denial of service     (memory consumption) via an invalid CLONE_NEWUSER     unshare call.(CVE-2013-4205)

  - Off-by-one error in the build_unc_path_to_root function     in fs/cifs/connect.c in the Linux kernel before 3.9.6     allows remote attackers to cause a denial of service     (memory corruption and system crash) via a DFS share     mount operation that triggers use of an unexpected DFS     referral name length.(CVE-2013-4247)

  - The net_ctl_permissions function in net/sysctl_net.c in     the Linux kernel before 3.11.5 does not properly     determine uid and gid values, which allows local users     to bypass intended /proc/sys/net restrictions via a     crafted application.(CVE-2013-4270)

  - Interpretation conflict in     drivers/md/dm-snap-persistent.c in the Linux kernel     through 3.11.6 allows remote authenticated users to     obtain sensitive information or modify data via a     crafted mapping to a snapshot block     device.(CVE-2013-4299)

  - The scm_check_creds function in net/core/scm.c in the     Linux kernel before 3.11 performs a capability check in     an incorrect namespace, which allows local users to     gain privileges via PID spoofing.(CVE-2013-4300)

  - It was found that the Linux kernel did not properly     account file descriptors passed over the unix socket     against the process limit. A local user could use this     flaw to exhaust all available memory on the     system.(CVE-2013-4312)

  - Use-after-free vulnerability in drivers/net/tun.c in     the Linux kernel through 3.11.1 allows local users to     gain privileges by leveraging the CAP_NET_ADMIN     capability and providing an invalid tuntap interface     name in a TUNSETIFF ioctl call.(CVE-2013-4343)

  - Off-by-one error in the get_prng_bytes function in     crypto/ansi_cprng.c in the Linux kernel through 3.11.4     makes it easier for context-dependent attackers to     defeat cryptographic protection mechanisms via multiple     requests for small amounts of data, leading to improper     management of the state of the consumed     data.(CVE-2013-4345)

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002152 advisory.

    The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel     through 3.10.3 does not properly maintain information about whether the IPV6_MTU setsockopt option had     been specified, which allows local users to cause a denial of service (BUG and system crash) via a crafted     application that uses the UDP_CORK option in a setsockopt system call.

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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002324 advisory.

    The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel     through 3.10.3 does not properly maintain information about whether the IPV6_MTU setsockopt option had     been specified, which allows local users to cause a denial of service (BUG and system crash) via a crafted     application that uses the UDP_CORK option in a setsockopt system call.

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.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0057 for details.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
76665	RHEL 6：MRG (RHSA-2013:1264)	Nessus	Red Hat Local Security Checks	2014/7/22	2021/1/14	high
99163	OracleVM 3.3：Unbreakable / 等 (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	2017/4/3	2025/12/26	critical
75184	openSUSE Security Update : kernel (openSUSE-SU-2013:1619-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/19	high
76665	RHEL 6 : MRG (RHSA-2013:1264)	Nessus	Red Hat Local Security Checks	2014/7/22	2021/1/14	high
124797	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1473)	Nessus	Huawei Local Security Checks	2019/5/13	2024/5/23	medium
286896	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002152)	Nessus	Unity Linux Local Security Checks	2026/1/15	2026/1/15	medium
287167	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002324)	Nessus	Unity Linux Local Security Checks	2026/1/15	2026/1/15	medium
70040	SuSE 11.3 Security Update : Linux kernel (SAT Patch Numbers 8269 / 8270 / 8283)	Nessus	SuSE Local Security Checks	2013/9/21	2021/1/19	high
99163	OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	2017/4/3	2025/12/26	critical

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