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===================================================================== Red Hat Security Advisory
Synopsis: Important: kernel security, bug fix, and enhancement update Advisory ID: RHSA-2021:1093-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:1093 Issue date: 2021-04-06 CVE Names: CVE-2020-0466 CVE-2020-27152 CVE-2020-28374 CVE-2021-3347 CVE-2021-26708 CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 =====================================================================
1. Summary:
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 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 CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64 Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)
* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708)
* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)
* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
* Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152)
* kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)
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.
Bug Fix(es):
* race condition when creating child sockets from syncookies (BZ#1915529)
* On System Z, a hash needs state randomized for entropy extraction (BZ#1915816)
* scsi: target: core_tmr_abort_task() reporting multiple aborts for the same se_cmd->tag (BZ#1918354)
* [mlx5] VF interface stats are not reflected in "ip -s link show" / "ifconfig <vf>" commands (BZ#1921060)
* Win10 guest automatic reboot after migration in Win10 and WSL2 on Intel hosts (BZ#1923281)
* [RHEL 8.3] Repeated messages - Unable to burst-read optrom segment (BZ#1924222)
* Backport bug fix RDMA/umem: Prevent small pages from being returned by ib_umem_find_best_pgsz (BZ#1924691)
* [Cisco 8.3] RHEL/Cent 8.2 fNIC driver needs a patch fix that addresses crash (BZ#1925186)
* RHEL8.3 - The kernel misdetects zCX with z/VM (BZ#1925508)
* Backport 22e4663e91 ("mm/slub: fix panic in slab_alloc_node()") (BZ#1925511)
* SCTP "Address already in use" when no active endpoints from RHEL 8.2 onwards (BZ#1927521)
* lpfc: Fix initial FLOGI failure due to BBSCN not supported (BZ#1927921)
* [mm] mm, oom: remove oom_lock from oom_reaper (BZ#1929738)
* Unexpected thread movement with AMD Milan compared to Rome (BZ#1929740)
* rpmbuild cannot build the userspace RPMs in the kernel package when the kernel itself is not built (BZ#1929910)
* [Regression] RHEL8.2 - ISST-LTE:pVM:diapvmlp83:sum:memory DLPAR fails to add memory on multiple trials[mm/memory_hotplug.c:1163] (mm-) (BZ#1930168)
* Configuring the system with non-RT kernel will hang the system (BZ#1930735)
* Upstream Patch for Gracefully handle DMAR units with no supported address widthsx86/vt-d (BZ#1932199)
* gfs2: Deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func (BZ#1937109)
* Failing on tsx-ctrl when the flag doesn't change anything (BZ#1939013)
Enhancement(s):
* RFE: Backport all Audit enhancements and fixes up to version 5.10-rc1 (BZ#1907520)
* RHEL8.4: Update the target driver (BZ#1918363)
* [Mellanox 8.4 FEAT] mlx5: Hairpin Support in Switch Mode (BZ#1924689)
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/):
1888886 - CVE-2020-27152 Kernel: KVM: host stack overflow due to lazy update IOAPIC 1899804 - CVE-2020-28374 kernel: SCSI target (LIO) write to any block on ILO backstore 1920480 - CVE-2020-0466 kernel: use after free in eventpoll.c may lead to escalation of privilege 1922249 - CVE-2021-3347 kernel: Use after free via PI futex state 1925588 - CVE-2021-26708 kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c 1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem 1930079 - CVE-2021-27363 kernel: iscsi: unrestricted access to sessions and handles 1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module
6. Package List:
Red Hat Enterprise Linux BaseOS (v. 8):
Source: kernel-4.18.0-240.22.1.el8_3.src.rpm
aarch64: bpftool-4.18.0-240.22.1.el8_3.aarch64.rpm bpftool-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-core-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-cross-headers-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-core-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-devel-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-modules-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-modules-extra-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-devel-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-headers-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-modules-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-modules-extra-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-tools-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-tools-libs-4.18.0-240.22.1.el8_3.aarch64.rpm perf-4.18.0-240.22.1.el8_3.aarch64.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm python3-perf-4.18.0-240.22.1.el8_3.aarch64.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm
noarch: kernel-abi-whitelists-4.18.0-240.22.1.el8_3.noarch.rpm kernel-doc-4.18.0-240.22.1.el8_3.noarch.rpm
ppc64le: bpftool-4.18.0-240.22.1.el8_3.ppc64le.rpm bpftool-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-core-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-cross-headers-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-core-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-devel-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-modules-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-modules-extra-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-devel-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-headers-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-modules-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-modules-extra-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-tools-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-tools-libs-4.18.0-240.22.1.el8_3.ppc64le.rpm perf-4.18.0-240.22.1.el8_3.ppc64le.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm python3-perf-4.18.0-240.22.1.el8_3.ppc64le.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm
s390x: bpftool-4.18.0-240.22.1.el8_3.s390x.rpm bpftool-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm kernel-4.18.0-240.22.1.el8_3.s390x.rpm kernel-core-4.18.0-240.22.1.el8_3.s390x.rpm kernel-cross-headers-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debug-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debug-core-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debug-devel-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debug-modules-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debug-modules-extra-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm kernel-debuginfo-common-s390x-4.18.0-240.22.1.el8_3.s390x.rpm kernel-devel-4.18.0-240.22.1.el8_3.s390x.rpm kernel-headers-4.18.0-240.22.1.el8_3.s390x.rpm kernel-modules-4.18.0-240.22.1.el8_3.s390x.rpm kernel-modules-extra-4.18.0-240.22.1.el8_3.s390x.rpm kernel-tools-4.18.0-240.22.1.el8_3.s390x.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm kernel-zfcpdump-4.18.0-240.22.1.el8_3.s390x.rpm kernel-zfcpdump-core-4.18.0-240.22.1.el8_3.s390x.rpm kernel-zfcpdump-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm kernel-zfcpdump-devel-4.18.0-240.22.1.el8_3.s390x.rpm kernel-zfcpdump-modules-4.18.0-240.22.1.el8_3.s390x.rpm kernel-zfcpdump-modules-extra-4.18.0-240.22.1.el8_3.s390x.rpm perf-4.18.0-240.22.1.el8_3.s390x.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm python3-perf-4.18.0-240.22.1.el8_3.s390x.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.s390x.rpm
x86_64: bpftool-4.18.0-240.22.1.el8_3.x86_64.rpm bpftool-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-core-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-cross-headers-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-core-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-devel-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-modules-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-modules-extra-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debuginfo-common-x86_64-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-devel-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-headers-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-modules-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-modules-extra-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-tools-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-tools-libs-4.18.0-240.22.1.el8_3.x86_64.rpm perf-4.18.0-240.22.1.el8_3.x86_64.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm python3-perf-4.18.0-240.22.1.el8_3.x86_64.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm
Red Hat CodeReady Linux Builder (v. 8):
aarch64: bpftool-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm kernel-tools-libs-devel-4.18.0-240.22.1.el8_3.aarch64.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.aarch64.rpm
ppc64le: bpftool-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm kernel-tools-libs-devel-4.18.0-240.22.1.el8_3.ppc64le.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.ppc64le.rpm
x86_64: bpftool-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debug-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-debuginfo-common-x86_64-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-tools-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm kernel-tools-libs-devel-4.18.0-240.22.1.el8_3.x86_64.rpm perf-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm python3-perf-debuginfo-4.18.0-240.22.1.el8_3.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2020-0466 https://access.redhat.com/security/cve/CVE-2020-27152 https://access.redhat.com/security/cve/CVE-2020-28374 https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/cve/CVE-2021-26708 https://access.redhat.com/security/cve/CVE-2021-27363 https://access.redhat.com/security/cve/CVE-2021-27364 https://access.redhat.com/security/cve/CVE-2021-27365 https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/
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