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SUSE-SU-2021:0434-1

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SUSE-SU-2021:0434-1

Published: 11 Feb 2021Last Modified: 4 Feb 2026

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Summary: Security update for the Linux Kernel

Details: The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2021-3348: Fixed a use-after-free in nbd_add_socket() that could be triggered by local attackers (with access to the nbd device) via an I/O request (bnc#1181504). - 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-2020-27835: 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). - 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). - CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846). - 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-2020-0444: 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-2020-4788: 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). - 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-2020-29371: Fixed uninitialized memory leaks to userspace (bsc#1179429). - 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-2020-15437: 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-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372). - CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663). The following non-security bugs were fixed: - blk-mq: improve heavily contended tag case (bsc#1178198). - debugfs_lookup(): switch to lookup_one_len_unlocked() (bsc#1171979). - 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: Do not enable IRQs unconditionally in put_pi_state() (bsc#1149032). - futex: Ensure the correct return value from futex_lock_pi() (bsc#1181349 bsc#1149032). - futex: Fix incorrect should_fail_futex() handling (bsc#1181349). - futex: Handle faults correctly for PI futexes (bsc#1181349 bsc#1149032). - futex: Provide and use pi_state_update_owner() (bsc#1181349 bsc#1149032). - futex: Replace pointless printk in fixup_owner() (bsc#1181349 bsc#1149032). - futex: Simplify fixup_pi_state_owner() (bsc#1181349 bsc#1149032). - futex: Use pi_state_update_owner() in put_pi_state() (bsc#1181349 bsc#1149032). - HID: Fix slab-out-of-bounds read in hid_field_extract (bsc#1180052). - iommu/vt-d: Do not dereference iommu_device if IOMMU_API is not built (bsc#1181001, jsc#ECO-3191). - iommu/vt-d: Gracefully handle DMAR units with no supported address widths (bsc#1181001, jsc#ECO-3191). - kABI: Fix kABI for extended APIC-ID support (bsc#1181001, jsc#ECO-3191). - locking/futex: Allow low-level atomic operations to return -EAGAIN (bsc#1149032). - md/bitmap: fix memory leak of temporary bitmap (bsc#1163727). - md/bitmap: md_bitmap_get_counter returns wrong blocks (bsc#1163727). - md/bitmap: md_bitmap_read_sb uses wrong bitmap blocks (bsc#1163727). - md/cluster: block reshape with remote resync job (bsc#1163727). - md/cluster: fix deadlock when node is doing resync job (bsc#1163727). - md-cluster: Fix potential error pointer dereference in resize_bitmaps() (bsc#1163727). - md-cluster: fix rmmod issue when md_cluster convert bitmap to none (bsc#1163727). - md-cluster: fix safemode_delay value when converting to clustered bitmap (bsc#1163727). - md-cluster: fix wild pointer of unlock_all_bitmaps() (bsc#1163727). - Move upstreamed bt fixes into sorted section - nbd: Fix memory leak in nbd_add_socket (bsc#1181504). - net/x25: prevent a couple of overflows (bsc#1178590). - NFS: mark nfsiod as CPU_INTENSIVE (bsc#1177304). - rtmutex: Remove unused argument from rt_mutex_proxy_unlock() (bsc#1181349 bsc#1149032). - s390/dasd: fix hanging device offline processing (bsc#1144912). - scsi: ibmvfc: Avoid link down on FS9100 canister reboot (bsc#1176962 ltc#188304). - scsi: ibmvfc: Use compiler attribute defines instead of __attribute__() (bsc#1176962 ltc#188304). - SUNRPC: cache: ignore timestamp written to 'flush' file (bsc#1178036). - x86/apic: Fix x2apic enablement without interrupt remapping (bsc#1181001, jsc#ECO-3191). - x86/apic: Support 15 bits of APIC ID in IOAPIC/MSI where available (bsc#1181001, jsc#ECO-3191). - x86/ioapic: Handle Extended Destination ID field in RTE (bsc#1181001, jsc#ECO-3191). - x86/kvm: Add KVM_FEATURE_MSI_EXT_DEST_ID (bsc#1181001, jsc#ECO-3191). - x86/kvm: Reserve KVM_FEATURE_MSI_EXT_DEST_ID (bsc#1181001, jsc#ECO-3191). - x86/msi: Only use high bits of MSI address for DMAR unit (bsc#1181001, jsc#ECO-3191). - x86/tracing: Introduce a static key for exception tracing (bsc#1179895). - x86/traps: Simplify pagefault tracing logic (bsc#1179895). - xfrm: Fix memleak on xfrm state destroy (bsc#1158775).

Affected packages

Package

Name: kernel-default

Purl: pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%209

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -4.12.14-95.68.1

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