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ALSA-2021:2168 — Important: kernel security and bug fix update

Affected: AlmaLinux:8: kernel-tools-libs-devel

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501)

* kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)

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):

* OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944667)

* Selinux: The task calling security_set_bools() deadlocks with itself when it later calls selinux_audit_rule_match(). (BZ#1945123)

* [mlx5] tc flower mpls match options does not work (BZ#1952061)

* mlx5: missing patches for ct.rel (BZ#1952062)

* CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets get dropped for seconds in a row (BZ#1952065)

* [Lenovo 8.3 bug] Blackscreen after clicking on "Settings" icon from top-right corner. (BZ#1952900)

* AlmaLinux 8.x missing uio upstream fix. (BZ#1952952)

* Turbostat doesn't show any measured data on AMD Milan (BZ#1952987)

* P620 no sound from front headset jack (BZ#1954545)

* AlmaLinux kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1955188)

* [net/sched] connection failed with DNAT + SNAT by tc action ct (BZ#1956458)

bdu:2021-04858

Withdrawn: BELL-CVE-2021-3543 — CVE-2021-3543 does not affect BellSoft software

Withdrawn by the publisher.

certfr-2021-avi-424 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Red Hat. Certaines d'entre elles permettent à un…

certfr-2021-avi-424

EUVD-2026-21001

fkie_cve-2021-3543

A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.

GHSA-5rp3-9frh-m3wx

gsd-2021-3543

RHSA-2021:2168 — Red Hat Security Advisory: kernel security and bug fix update

kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run kernel: nitro_enclaves stale file descriptors on failed usercopy

RHSA-2021:2169 — Red Hat Security Advisory: kernel-rt security and bug fix update

kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run kernel: nitro_enclaves stale file descriptors on failed usercopy

UBUNTU-CVE-2021-3543

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.4, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3, Ubuntu:18.04:LTS: linux-gcp-edge and 11 more