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SUSE-SU-2021:0437-1

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SUSE-SU-2021:0437-1

Published: 11 Feb 2021Last Modified: 4 Feb 2026

Upstream:

Aliases:

Summary: Security update for the Linux Kernel

Details: The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - 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). - CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509). - CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508). - CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395). - CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027). - CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029). - 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). - 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). - 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). - 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). - CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601). - CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960). - CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745). - CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745). - 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). - 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). - CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182). - CVE-2020-25285: A race condition between hugetlb sysctl handlers in mm/hugetlb.c could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact (bnc#1176485 ). - CVE-2020-15437: Fixed a null pointer dereference which could have allowed local users to cause a denial of service (bsc#1179140). - CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559). - CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952). - CVE-2020-25668: Fixed a use-after-free in con_font_op() (bsc#1178123). - CVE-2020-27673: Fixed an issue where rogue guests could have caused denial of service of Dom0 via high frequency events (XSA-332 bsc#1177411) - CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663). - CVE-2019-19063: Fixed two memory leaks in the rtl_usb_probe() which could eventually have allowed attackers to cause a denial of service (memory consumption) (bnc#1157298 ). - CVE-2019-6133: Fixed an issue where the 'start time' protection mechanism could have been bypassed and therefore authorization decisions are improperly cached (bsc#1128172). The following non-security bugs were fixed: - HID: Fix slab-out-of-bounds read in hid_field_extract (bsc#1180052). - epoll: Keep a reference on files added to the check list (bsc#1180031). - fix regression in 'epoll: Keep a reference on files added to the check list' (bsc#1180031, git-fixes). - futex,rt_mutex: Fix rt_mutex_cleanup_proxy_lock() (bsc#969755). - futex,rt_mutex: Introduce rt_mutex_init_waiter() (bsc#969755). - futex,rt_mutex: Provide futex specific rt_mutex API (bsc#969755). - futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock() (bsc#969755). - futex: Avoid freeing an active timer (bsc#969755). - futex: Avoid violating the 10th rule of futex (bsc#969755). - futex: Change locking rules (bsc#969755). - futex: Do not enable IRQs unconditionally in put_pi_state() (bsc#969755). - futex: Drop hb->lock before enqueueing on the rtmutex (bsc#969755). - futex: Fix OWNER_DEAD fixup (bsc#969755). - futex: Fix incorrect should_fail_futex() handling (bsc#969755). - futex: Fix more put_pi_state() vs. exit_pi_state_list() races (bsc#969755). - futex: Fix pi_state->owner serialization (bsc#969755). - futex: Fix small (and harmless looking) inconsistencies (bsc#969755). - futex: Futex_unlock_pi() determinism (bsc#969755). - futex: Handle early deadlock return correctly (bsc#969755). - futex: Handle transient 'ownerless' rtmutex state correctly (bsc#969755). - futex: Pull rt_mutex_futex_unlock() out from under hb->lock (bsc#969755). - futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock() (bsc#969755). - futex: Rework inconsistent rt_mutex/futex_q state (bsc#969755). - locking/futex: Allow low-level atomic operations to return -EAGAIN (bsc#969755). - mm/userfaultfd: do not access vma->vm_mm after calling handle_userfault() (bsc#1179204).

Affected packages

Package

Name: kernel-default

Purl: pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%207

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -4.4.121-92.149.1

Affected versions

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High