Executive Summary

Summary
Title kernel security, bug fix, and enhancement update
Informations
Name RHSA-2020:0834 First vendor Publication 2020-03-17
Vendor RedHat Last vendor Modification 2020-03-17
Severity (Vendor) N/A Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

An update for kernel is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

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

Security Fix(es):

* kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

* kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow (CVE-2019-17666)

* Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135) (CVE-2019-19338)

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.

Bug Fix(es):

* RHEL7.7 - default idle mishandles lazy irq state (BZ#1767620)

* Sanitize MM backported code for RHEL7 (BZ#1768386)

* A bio with a flush and write to an md device can be lost and never complete by the md layer (BZ#1773482)

* [FJ7.7 Bug]: [REG] Read from /proc/net/if_inet6 never stop. (BZ#1778084)

* RHEL7.7 - zfcp: fix reaction on bit error threshold notification (BZ#1778691)

* RHEL7.7 Snapshot3 - Kernel Panic when running LTP mm test on s390x (BZ#1780035)

* Leak in cachefiles driver (BZ#1780149)

* VFS: Busy inodes after unmount of loop0 when encountering duplicate directory inodes (BZ#1781159)

* Allocation failure in md's r10buf_pool_alloc function leads to a crash from accessing uninitialized pointers (BZ#1781584)

* [Hyper-V][RHEL7.6]Hyper-V guest waiting indefinitely for RCU callback when removing a mem cgroup (BZ#1783177)

* A bnx2fc abort attempt doesn't timeout from miscalculation causing a huge timeout value (BZ#1784824)

* scsi: libiscsi: fall back to sendmsg for slab pages (BZ#1784826)

* RHEL7.7 - kernel: avoid cpu yield in SMT environment (BZ#1787558)

* RHEL7.6 - kernel: jump label transformation performance (BZ#1787559)

* drm radeon power management warning on VERDE cards (BZ#1789744)

* Duplicate enum value in include/linux/blk_types.h (BZ#1791781)

* [HPE 7.7 Bug] hpsa: bug fix for reset issue (BZ#1791782)

* System Crash on vport creation (NPIV on FCoE) (BZ#1791825)

* [Hyper-V][RHEL 7.8] Four Mellanox Patches needed for kernels that have that have SRIOV (BZ#1792371)

* WARNING: CPU: 7 PID: 2049 at mm/slub.c:2296 ___slab_alloc+0x508/0x520 (BZ#1793086)

* fio with ioengine=pmemblk on fsdax failed (BZ#1793088)

* [HPE 7.7 Bug] hpsa: bug fixes (BZ#1793579)

* perf top -p PID does not show anything (BZ#1793581)

* Delay in RT task scheduled. Incorrect nr_scheduled value. (BZ#1796261)

* A directory on a gfs2 filesystem appears corrupt on nodeB after nodeA renames the directory (BZ#1796431)

* ixgbevf interface goes down on hypervisor and causes outage (BZ#1796798)

* Can't enable virt-ssbd on some AMD hosts (BZ#1797511)

* [HPEMC 7.8 BUG] x86/boot/64: Avoid mapping reserved ranges in early page tables (BZ#1798163)

Enhancement(s):

* scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show' (BZ#1791595)

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1703063 - CVE-2019-11487 kernel: Count overflow in FUSE request leading to use-after-free issues. 1763690 - CVE-2019-17666 kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow 1781514 - CVE-2019-19338 Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2020-0834.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3293

Alert History

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Date Informations
2020-03-19 13:20:08
  • First insertion