Moderate: kernel security and bug fix update

Synopsis

Moderate: kernel security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

Description

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

Security Fix(es):

• kernel: powerpc: local user can read vector registers of other users' processes via a Facility Unavailable exception (CVE-2019-15030)
  
• kernel: powerpc: local user can read vector registers of other users' processes via an interrupt (CVE-2019-15031)
  
• kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure (CVE-2019-18660)
  
• kernel: use-after-free caused by a malicious USB device in the drivers/hid/usbhid/hiddev.c driver (CVE-2019-19527)
  

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):

• [FJ8.1 Bug]: fs/devpts: always delete dcache dentry-s in dput() (BZ#1783959)
  
• qla2xxx: call dma_free_coherent with correct size in all cases in qla24xx_sp_unmap (BZ#1788206)
  
• qla2xxxx: Firmware update for Gen7 adapter could result in an unusable adapter (BZ#1790350)
  
• s390/sclp: Fix bit checked for has_sipl (BZ#1791408)
  
• RHEL8.1 - Error output for CPU-MF auxtrace data in perf: (BZ#1792198)
  
• [FJ8.0 Bug]: [kernel]: using "kexec -e" to reboot A64FX system causes system panic during the boot of the 2nd kernel (BZ#1792200)
  
• Fixup tlbie vs store ordering issue on POWER9 (BZ#1794058)
  
• RHEL8.1 - qeth: add safeguards to RX data path (BZ#1794059)
  
• RHEL8.1 - STC940:ZZ:Fleet:RHEL:LPM failed with no rmc connection during 6th iteration (ibmvnic) (BZ#1794060)
  
• RHEL8.1 - disable trace-imc feature (perf:) (BZ#1794061)
  
• [Broadcom RHEL8.2 FEAT]: megaraid_sas driver update request (BZ#1795335)
  
• RHEL8.1 pre-Beta - [ FW940 ] [ zz P9 ] kdump fails when XIVE is enabled and dump is trigged from HMC. (BZ#1795337)
  
• T10 DIF: OOM observed while running I/O (BZ#1795338)
  
• backport fix for potential deadlock relative to snapshot COW throttling (BZ#1796490)
  
• Neoverse n1 errata 1542419 "Core may fetch stale instructions from memory and violate ordering" (BZ#1797518)
  
• [HPE 8.1 Bug] hpsa: bug fix for reset issue (BZ#1797519)
  
• [HPE 8.0 BUG] System crash when reading /sys/block//mq/0/cpu_list file (BZ#1797960)
  
• kernel: T10 CRC not using hardware-accelerated version from crct10dif_pclmul (BZ#1797961)
  
• [FJ8.1 Bug]: Dirty pages remain when write() returns ENOSPC. (BZ#1797962)
  
• RHEL 8 - NVMe/FC Fabric Broadcom Autoconnect Script Fails to Reconnect after Controller Reset (BZ#1798381)
  
• [RHEL8.2]: Chelsio crypto co-processor Driver (chcr) bugfixes (BZ#1798527)
  
• [RHEL8.1][Snapshot-1]LUN discovery says unrecognized (BZ#1801216)
  
• 8.2 snap2 kernel incorrectly signed in brew (BZ#1807231)

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.

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.1 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.1 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.1 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.1 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.1 x86_64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.1 aarch64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.1 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.1 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.1 aarch64

Fixes

• BZ - 1759313 - CVE-2019-15030 kernel: powerpc: local user can read vector registers of other users' processes via a Facility Unavailable exception
• BZ - 1760063 - CVE-2019-15031 kernel: powerpc: local user can read vector registers of other users' processes via an interrupt
• BZ - 1777825 - CVE-2019-18660 kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure
• BZ - 1783498 - CVE-2019-19527 kernel: use-after-free caused by a malicious USB device in the drivers/hid/usbhid/hiddev.c driver

CVEs

• CVE-2019-15030
• CVE-2019-15031
• CVE-2019-18660
• CVE-2019-19527

References

• https://access.redhat.com/security/updates/classification/#moderate