7.8 - RHSA-2019:3309

Problem Description:

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

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 Real Time (v. 8) - x86_64 Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: nfs: use-after-free in svc_process_common() (CVE-2018-16884)

* Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900)

* Kernel: page cache side channel attacks (CVE-2019-5489)

* hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB) (CVE-2019-9506)

* kernel: Heap overflow in mwifiex_uap_parse_tail_ies function in drivers/net/wireless/marvell/mwifiex/ie.c (CVE-2019-10126)

* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)

* kernel: Information Disclosure in crypto_report_one in crypto/crypto_user.c (CVE-2018-19854)

* kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS (CVE-2018-20169)

* kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459)

* kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460)

* kernel: SCTP socket buffer memory leak leading to denial of service (CVE-2019-3874)

* kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882)

* kernel: null-pointer dereference in hci_uart_set_flow_control (CVE-2019-10207)

* kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599)

* kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833)

* kernel: sensitive information disclosure from kernel stack memory via HIDPCONNADD command (CVE-2019-11884)

* kernel: use-after-free in arch/x86/lib/insn-eval.c (CVE-2019-13233)

* kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service (CVE-2019-15916)

* kernel: oob memory read in hso_probe in drivers/net/usb/hso.c (CVE-2018-19985)

* Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222)

* Kernel: net: weak IP ID generation leads to remote device tracking (CVE-2019-10638)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section.

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/):

1656986 - CVE-2018-19854 kernel: Information Disclosure in crypto_report_one in crypto/crypto_user.c 1660375 - CVE-2018-16884 kernel: nfs: use-after-free in svc_process_common() 1660385 - CVE-2018-20169 kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS 1663176 - CVE-2019-3459 kernel: Heap address information leak while using L2CAP_GET_CONF_OPT 1663179 - CVE-2019-3460 kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP 1664110 - CVE-2019-5489 Kernel: page cache side channel attacks 1666106 - CVE-2018-19985 kernel: oob memory read in hso_probe in drivers/net/usb/hso.c 1671930 - CVE-2019-7222 Kernel: KVM: leak of uninitialized stack contents to guest 1678887 - RT: update RT source tree to the RHEL-8.1 tree 1686373 - CVE-2019-3874 kernel: SCTP socket buffer memory leak leading to denial of service 1689426 - CVE-2019-3882 kernel: denial of service vector through vfio DMA mappings 1698757 - CVE-2019-3900 Kernel: vhost_net: infinite loop while receiving packets leads to DoS 1700666 - Make kernel-rt require rt-setup 1705937 - CVE-2019-11599 kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping 1709837 - CVE-2019-11884 kernel: sensitive information disclosure from kernel stack memory via HIDPCONNADD command 1712072 - CVE-2019-11833 kernel: fs/ext4/extents.c leads to information disclosure 1716992 - CVE-2019-10126 kernel: Heap overflow in mwifiex_uap_parse_tail_ies function in drivers/net/wireless/marvell/mwifiex/ie.c 1724657 - BUG: scheduling while atomic in zswap 1727756 - CVE-2019-13233 kernel: use-after-free in arch/x86/lib/insn-eval.c 1727857 - CVE-2019-9506 hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB) 1728765 - BUG: scheduling while atomic: rcuc/13/134/0x00000002 1729931 - CVE-2019-10638 Kernel: net: weak IP ID generation leads to remote device tracking 1733472 - BUG: scheduling while atomic: rcuc/1/24/0x00000002 1733874 - CVE-2019-10207 kernel: null-pointer dereference in hci_uart_set_flow_control 1743931 - BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 1745646 - [RT] sched/fair: Robustify CFS-bandwidth timer locking 1746708 - CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer 1750813 - CVE-2019-15916 kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service