The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).

CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).

CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).

CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).

CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).

CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).

CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).

CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).

CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).

CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).

CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).

CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).

CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).

CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).

CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).

CVE-2020-25285: A race condition between hugetlb sysctl handlers in mm/hugetlb.c could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact (bnc#1176485 ).

CVE-2020-15437: Fixed a NULL pointer dereference which could have allowed local users to cause a denial of service (bsc#1179140).

CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).

CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).

CVE-2020-25668: Fixed a use-after-free in con_font_op() (bsc#1178123).

CVE-2020-27673: Fixed an issue where rogue guests could have caused denial of service of Dom0 via high frequency events (XSA-332 bsc#1177411)

CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).

CVE-2019-19063: Fixed two memory leaks in the rtl_usb_probe() which could eventually have allowed attackers to cause a denial of service (memory consumption) (bnc#1157298 ).

CVE-2019-6133: Fixed an issue where the 'start time' protection mechanism could have been bypassed and therefore authorization decisions are improperly cached (bsc#1128172).

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.

Security Fix(es) :

  - polkit: Temporary auth hijacking via PID reuse and     non-atomic fork (CVE-2019-6133)

The remote Ubuntu 14.04 LTS / 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3901-2 advisory.

    USN-3901-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu     16.04 LTS.

    Jann Horn discovered that the userfaultd implementation in the Linux kernel did not properly restrict     access to certain ioctls. A local attacker could use this possibly to modify files. (CVE-2018-18397)

    It was discovered that the crypto subsystem of the Linux kernel leaked uninitialized memory to user space     in some situations. A local attacker could use this to expose sensitive information (kernel memory).
    (CVE-2018-19854)

    Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker     could use this to gain access to services that cache authorizations. (CVE-2019-6133)

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.

A vulnerability was found in polkit. When authentication is performed by a non-root user to perform an administrative task, the authentication is temporarily cached in such a way that a local attacker could impersonate the authorized process, thus gaining access to elevated privileges.(CVE-2019-6133)

According to the version of the polkit packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - polkit: Temporary auth hijacking via PID reuse and     non-atomic fork (CVE-2019-6133)

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 remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has polkit packages installed that are affected by a vulnerability:

  - A vulnerability was found in polkit. When authentication     is performed by a non-root user to perform an     administrative task, the authentication is temporarily     cached in such a way that a local attacker could     impersonate the authorized process, thus gaining access     to elevated privileges. (CVE-2019-6133)

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

The remote NewStart CGSL host, running version MAIN 4.05, has polkit packages installed that are affected by a vulnerability:

  - A vulnerability was found in polkit. When authentication     is performed by a non-root user to perform an     administrative task, the authentication is temporarily     cached in such a way that a local attacker could     impersonate the authorized process, thus gaining access     to elevated privileges. (CVE-2019-6133)

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

This update for polkit fixes the following issues :

Security issue fixed :

CVE-2019-6133: Fixed improper caching of auth decisions, which could bypass uid checking in the interactive backend (bsc#1121826).

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.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2019:2699 advisory.

    The polkit packages provide a component for controlling system-wide privileges. This component provides a     uniform and organized way for non-privileged processes to communicate with privileged ones.

    Security Fix(es):

    * polkit: Temporary auth hijacking via PID reuse and non-atomic fork (CVE-2019-6133)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 polkit package has been released.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003871 advisory.

    In PolicyKit (aka polkit) 0.115, the start time protection mechanism can be bypassed because fork() is     not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid     checking in polkitbackend/polkitbackendinteractiveauthority.c.

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 :

  - Fix of CVE-2019-6133, PID reuse via slow fork

  - Resolves: rhbz#1667310

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

  - scsi: libfc: Fixup disc_mutex handling in fcoe module     (Hannes Reinecke) [Orabug: 29511036]

  - scsi: libfc: sanitize E_D_TOV and R_A_TOV setting in fcp     (Hannes Reinecke) [Orabug: 29511036]

  - sysctl: Fix kabi breakage (Shuning Zhang) [Orabug:
    29689925]

  - proc: Fix proc_sys_prune_dcache to hold a sb reference     (Eric W. Biederman) [Orabug: 29689925]

  - proc/sysctl: Don't grab i_lock under sysctl_lock. (Eric     W. Biederman) [Orabug: 29689925]

  - proc/sysctl: prune stale dentries during unregistering     (Konstantin Khlebnikov) [Orabug: 29689925]

  - scsi: smartpqi: correct lun reset issues (Kevin Barnett)     [Orabug: 29848621]

  - fork: record start_time late (David Herrmann) [Orabug:
    29850581] (CVE-2019-6133)

  - mm: avoid taking zone lock in pagetypeinfo_showmixed     (Vinayak Menon) [Orabug: 29905302]

  - x86/retpoline/ia32entry: Convert to non-speculative     calls (Ankur Arora) [Orabug: 29909295] (CVE-2017-5715)

  - tun: call dev_get_valid_name before register_netdevice     (Cong Wang) [Orabug: 29925555] (CVE-2018-7191)

  - mm/madvise.c: fix madvise infinite loop under special     circumstances (chenjie) [Orabug: 29925610]     (CVE-2017-18208)

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
146476	SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0437-1)	Nessus	SuSE Local Security Checks	2021/2/12	2023/2/9	critical
122468	Scientific Linux Security Update : polkit on SL6.x i386/x86_64 (20190226)	Nessus	Scientific Linux Local Security Checks	2019/2/27	2025/3/20	medium
122647	Ubuntu 14.04 LTS / 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3901-2)	Nessus	Ubuntu Local Security Checks	2019/3/6	2025/3/20	medium
122677	Amazon Linux 2 : polkit (ALAS-2019-1171)	Nessus	Amazon Linux Local Security Checks	2019/3/8	2025/3/20	medium
122693	EulerOS 2.0 SP5 : polkit (EulerOS-SA-2019-1070)	Nessus	Huawei Local Security Checks	2019/3/8	2025/3/20	medium
123596	EulerOS 2.0 SP2 : polkit (EulerOS-SA-2019-1122)	Nessus	Huawei Local Security Checks	2019/4/2	2025/3/12	medium
127244	NewStart CGSL CORE 5.04 / MAIN 5.04 : polkit Vulnerability (NS-SA-2019-0055)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2025/2/25	medium
127424	NewStart CGSL MAIN 4.05 : polkit Vulnerability (NS-SA-2019-0151)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2025/2/24	medium
127755	SUSE SLED15 / SLES15 Security Update : polkit (SUSE-SU-2019:2018-1)	Nessus	SuSE Local Security Checks	2019/8/12	2025/2/24	medium
127761	SUSE SLED12 / SLES12 Security Update : polkit (SUSE-SU-2019:2035-1)	Nessus	SuSE Local Security Checks	2019/8/12	2025/2/24	medium
128664	RHEL 7 : polkit (RHSA-2019:2699)	Nessus	Red Hat Local Security Checks	2019/9/11	2025/2/24	medium
202886	Photon OS 2.0: Polkit PHSA-2019-2.0-0161	Nessus	PhotonOS Local Security Checks	2024/7/22	2025/2/19	medium
288602	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003871)	Nessus	Unity Linux Local Security Checks	2026/1/16	2026/1/17	medium
122573	OracleVM 3.3 / 3.4 : polkit (OVMSA-2019-0008)	Nessus	OracleVM Local Security Checks	2019/3/4	2025/11/20	medium
126670	OracleVM 3.4 : Unbreakable / etc (OVMSA-2019-0035) (Spectre)	Nessus	OracleVM Local Security Checks	2019/7/15	2025/2/25	medium

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