{"schemaVersion":3,"id":"SUSE-SU-2021:0452-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Security update for the Linux Kernel\n\nThe SUSE Linux Enterprise 12 SP3 kernel was updated to receive various security and bugfixes.\n\n\nThe following security bugs were fixed:\n\n- 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).\n- CVE-2020-25211: Fixed a buffer overflow in ctnetlink_parse_tuple_filter() which could be triggered by a local attackers by injecting conntrack netlink configuration (bnc#1176395).\n- CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).\n- CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).\n- CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).\n- CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).\n- CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).\n- 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).\n- CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).\n- 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).\n- 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).\n- 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).\n- CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).\n- CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).\n- CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).\n- CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).\n- 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).\n- 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).\n- CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).\n- CVE-2020-15437: Fixed a null pointer dereference which could have allowed local users to cause a denial of service(bsc#1179140).\n- CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).\n- CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).\n- CVE-2020-25285: Fixed a race condition between hugetlb sysctl handlers in mm/hugetlb.c (bnc#1176485).\n- CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).\n- CVE-2018-10902: It was found that the raw midi kernel driver did not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation (bnc#1105322).\n\nThe following non-security bugs were fixed:\n\n- cifs: do not revalidate mountpoint dentries (bsc#1177440).\n- cifs: fix potential use-after-free in cifs_echo_request() (bsc#1139944).\n- cifs: ignore revalidate failures in case of process gets signaled (bsc#1177440).\n- epoll: Keep a reference on files added to the check list (bsc#1180031).\n- fix regression in 'epoll: Keep a reference on files added to the check list' (bsc#1180031, git-fixes).\n- futex: Avoid freeing an active timer (bsc#969755).\n- futex: Avoid violating the 10th rule of futex (bsc#969755).\n- futex: Change locking rules (bsc#969755).\n- futex: Do not enable IRQs unconditionally in put_pi_state() (bsc#969755).\n- futex: Drop hb->lock before enqueueing on the rtmutex (bsc#969755).\n- futex: Fix incorrect should_fail_futex() handling (bsc#969755).\n- futex: Fix more put_pi_state() vs. exit_pi_state_list() races (bsc#969755).\n- futex: Fix OWNER_DEAD fixup (bsc#969755).\n- futex: Fix pi_state->owner serialization (bsc#969755).\n- futex: Fix small (and harmless looking) inconsistencies (bsc#969755).\n- futex: Futex_unlock_pi() determinism (bsc#969755).\n- futex: Handle early deadlock return correctly (bsc#969755).\n- futex: Handle transient 'ownerless' rtmutex state correctly (bsc#969755).\n- futex: Pull rt_mutex_futex_unlock() out from under hb->lock (bsc#969755).\n- futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock() (bsc#969755).\n- futex: Rework inconsistent rt_mutex/futex_q state (bsc#969755).\n- futex,rt_mutex: Fix rt_mutex_cleanup_proxy_lock() (bsc#969755).\n- futex,rt_mutex: Introduce rt_mutex_init_waiter() (bsc#969755).\n- futex,rt_mutex: Provide futex specific rt_mutex API (bsc#969755).\n- futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock() (bsc#969755).\n- HID: Fix slab-out-of-bounds read in hid_field_extract (bsc#1180052).\n- IB/hfi1: Clean up hfi1_user_exp_rcv_setup function (bsc#1179878).\n- IB/hfi1: Clean up pin_vector_pages() function (bsc#1179878).\n- IB/hfi1: Fix the bail out code in pin_vector_pages() function (bsc#1179878).\n- IB/hfi1: Move structure definitions from user_exp_rcv.c to user_exp_rcv.h (bsc#1179878).\n- IB/hfi1: Name function prototype parameters (bsc#1179878).\n- IB/hfi1: Use filedata rather than filepointer (bsc#1179878).\n- locking/futex: Allow low-level atomic operations to return -EAGAIN (bsc#969755).\n- mm/userfaultfd: do not access vma->vm_mm after calling handle_userfault() (bsc#1179204).\n- scsi: iscsi: Fix a potential deadlock in the timeout handler (bsc#1178272).\n- Use r3 instead of r13 for l1d fallback flush in do_uaccess_fush (bsc#1181096 ltc#190883).\n- video: hyperv_fb: include vmalloc.h 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