RHSA-2020:4431: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

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.The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es):

• kernel: use after free in the video driver leads to local privilege escalation (CVE-2019-9458)
• kernel: use-after-free in drivers/bluetooth/hci_ldisc.c (CVE-2019-15917)
• kernel: out-of-bounds access in function hclge_tm_schd_mode_vnet_base_cfg (CVE-2019-15925)
• kernel: memory leak in ccp_run_sha_cmd() (CVE-2019-18808)
• kernel: Denial Of Service in the __ipmi_bmc_register() (CVE-2019-19046)
• kernel: out-of-bounds write in ext4_xattr_set_entry (CVE-2019-19319)
• Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid (CVE-2019-19332)
• kernel: use-after-free in ext4_put_super (CVE-2019-19447)
• kernel: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free (CVE-2019-19524)
• kernel: race condition caused by a malicious USB device in the USB character device driver layer (CVE-2019-19537)
• kernel: use-after-free in serial_ir_init_module() (CVE-2019-19543)
• kernel: use-after-free in __ext4_expand_extra_isize and ext4_xattr_set_entry (CVE-2019-19767)
• kernel: use-after-free in debugfs_remove (CVE-2019-19770)
• kernel: out-of-bounds write via crafted keycode table (CVE-2019-20636)
• kernel: possible use-after-free due to a race condition in cdev_get (CVE-2020-0305)
• kernel: out-of-bounds read in in vc_do_resize function (CVE-2020-8647)
• kernel: use-after-free in n_tty_receive_buf_common function (CVE-2020-8648)
• kernel: invalid read location in vgacon_invert_region function (CVE-2020-8649)
• kernel: uninitialized kernel data leak in userspace coredumps (CVE-2020-10732)
• kernel: SELinux netlink permission check bypass (CVE-2020-10751)
• kernel: out-of-bounds write in mpol_parse_str (CVE-2020-11565)
• kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668)
• kernel: buffer overflow in mt76_add_fragment function (CVE-2020-12465)
• kernel: xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write which could result in crash and data coruption (CVE-2020-12659)
• kernel: sg_write function lacks an sg_remove_request call in a certain failure case (CVE-2020-12770)
• kernel: possible to send arbitrary signals to a privileged (suidroot) parent process (CVE-2020-12826)
• kernel: referencing inode of removed superblock in get_futex_key() causes UAF (CVE-2020-14381)
• kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS (CVE-2020-25641)
• kernel: kernel pointer leak due to WARN_ON statement in video driver leads to local information disclosure (CVE-2019-9455)
• kernel: null pointer dereference in dlpar_parse_cc_property (CVE-2019-12614)
• kernel: null-pointer dereference in drivers/net/fjes/fjes_main.c (CVE-2019-16231)
• kernel: null pointer dereference in drivers/scsi/qla2xxx/qla_os.c (CVE-2019-16233)
• kernel: memory leak in af9005_identify_state() function (CVE-2019-18809)
• kernel: A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function (CVE-2019-19056)
• kernel: memory leak in the crypto_report() function (CVE-2019-19062)
• kernel: Two memory leaks in the rtl_usb_probe() function (CVE-2019-19063)
• kernel: A memory leak in the rtl8xxxu_submit_int_urb() function (CVE-2019-19068)
• kernel: A memory leak in the predicate_parse() function (CVE-2019-19072)
• kernel: information leak bug caused by a malicious USB device in the drivers/media/usb/ttusb-dec/ttusb_dec.c (CVE-2019-19533)
• kernel: Null pointer dereference in drop_sysctl_table() (CVE-2019-20054)
• kernel: kernel stack information leak on s390/s390x (CVE-2020-10773)
• kernel: possibility of memory disclosure when reading the file /proc/sys/kernel/rh_features (CVE-2020-10774)
• kernel: vhost-net: stack overflow in get_raw_socket while checking sk_family field (CVE-2020-10942)
• kernel: sync of excessive duration via an XFS v5 image with crafted metadata (CVE-2020-12655) Related CVEs:
• CVE-2019-9455: kernel: kernel pointer leak due to WARN_ON statement in video driver leads to local information disclosure
• CVE-2019-9458: kernel: use after free due to race condition in the video driver leads to local privilege escalation
• CVE-2019-12614: kernel: null pointer dereference in dlpar_parse_cc_property in arch/powerrc/platforms/pseries/dlpar.c causing denial of service
• CVE-2019-15917: kernel: use-after-free in drivers/bluetooth/hci_ldisc.c
• CVE-2019-15925: kernel: out-of-bounds access in function hclge_tm_schd_mode_vnet_base_cfg
• CVE-2019-16231: kernel: null-pointer dereference in drivers/net/fjes/fjes_main.c
• CVE-2019-16233: kernel: null pointer dereference in drivers/scsi/qla2xxx/qla_os.c
• CVE-2019-18808: kernel: memory leak in ccp_run_sha_cmd() function in drivers/crypto/ccp/ccp-ops.c
• CVE-2019-18809: kernel: memory leak in af9005_identify_state() function in drivers/media/usb/dvb-usb/af9005.c
• CVE-2019-19046: kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c
• CVE-2019-19056: kernel: A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function in drivers/net/wireless/marvell/mwifiex/pcie.c allows to cause DoS
• CVE-2019-19062: kernel: memory leak in the crypto_report() function in crypto/crypto_user_base.c allows for DoS
• CVE-2019-19063: kernel: Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c allow for a DoS
• CVE-2019-19068: kernel: A memory leak in the rtl8xxxu_submit_int_urb() function in drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c allows for a DoS
• CVE-2019-19072: kernel: A memory leak in the predicate_parse() function in kernel/trace/trace_events_filter.c allows for a DoS
• CVE-2019-19319: kernel: out-of-bounds write in ext4_xattr_set_entry in fs/ext4/xattr.c
• CVE-2019-19332: Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid
• CVE-2019-19447: kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c
• CVE-2019-19524: kernel: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free
• CVE-2019-19533: kernel: information leak bug caused by a malicious USB device in the drivers/media/usb/ttusb-dec/ttusb_dec.c
• CVE-2019-19537: kernel: race condition caused by a malicious USB device in the USB character device driver layer
• CVE-2019-19543: kernel: use-after-free in serial_ir_init_module() in drivers/media/rc/serial_ir.c
• CVE-2019-19602: kernel: cached use of fpu_fpregs_owner_ctx in arch/x86/include/asm/fpu/internal.h can lead to DoS
• CVE-2019-19767: kernel: use-after-free in __ext4_expand_extra_isize and ext4_xattr_set_entry related to fs/ext4/inode.c and fs/ext4/super.c
• CVE-2019-19770: kernel: use-after-free in debugfs_remove in fs/debugfs/inode.c
• CVE-2019-20054: kernel: Null pointer dereference in drop_sysctl_table() in fs/proc/proc_sysctl.c
• CVE-2019-20636: kernel: out-of-bounds write via crafted keycode table
• CVE-2019-20812: kernel: af_packet: TPACKET_V3: invalid timer timeout on error
• CVE-2020-0305: kernel: possible use-after-free due to a race condition in cdev_get of char_dev.c
• CVE-2020-0444: kernel: bad kfree in auditfilter.c may lead to escalation of privilege
• CVE-2020-8647: kernel: out-of-bounds read in in vc_do_resize function in drivers/tty/vt/vt.c
• CVE-2020-8648: kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c
• CVE-2020-8649: kernel: invalid read location in vgacon_invert_region function in drivers/video/console/vgacon.c
• CVE-2020-10732: kernel: uninitialized kernel data leak in userspace coredumps
• CVE-2020-10751: kernel: SELinux netlink permission check bypass
• CVE-2020-10773: kernel: kernel stack information leak on s390/s390x
• CVE-2020-10774: kernel: possibility of memory disclosure when reading the file /proc/sys/kernel/rh_features
• CVE-2020-10942: kernel: vhost-net: stack overflow in get_raw_socket while checking sk_family field
• CVE-2020-11565: kernel: out-of-bounds write in mpol_parse_str function in mm/mempolicy.c
• CVE-2020-11668: kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c
• CVE-2020-12465: kernel: buffer overflow in mt76_add_fragment function in drivers/net/wireless/mediatek/mt76/dma.c
• CVE-2020-12655: kernel: sync of excessive duration via an XFS v5 image with crafted metadata
• CVE-2020-12659: kernel: xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write which could result in crash and data coruption
• CVE-2020-12770: kernel: sg_write function lacks an sg_remove_request call in a certain failure case
• CVE-2020-12826: kernel: possible to send arbitrary signals to a privileged (suidroot) parent process
• CVE-2020-14381: kernel: referencing inode of removed superblock in get_futex_key() causes UAF
• CVE-2020-25641: kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS
• CVE-2021-3715: kernel: use-after-free in route4_change() in net/sched/cls_route.c