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ALSA-2021:3057 — Important: kernel security, bug fix, and enhancement 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: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)

* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)

* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

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):

* Urgent: Missing dptf_power.ko module in AlmaLinux8 (BZ#1968381)

* [mlx5] kdump over NFS fails: mlx5 driver gives error "Stop room 95 is bigger than the SQ size 64" (BZ#1969909)

* BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 in bluetooth hci_error_reset on intel-tigerlake-h01 (BZ#1972564)

* Update CIFS to kernel 5.10 (BZ#1973637)

* Backport "tick/nohz: Conditionally restart tick on idle exit" to AlmaLinux 8.5 (BZ#1978710)

* Significant performance drop starting on kernel-4.18.0-277 visible on mmap benchmark (BZ#1980314)

* Inaccessible NFS server overloads clients (native_queued_spin_lock_slowpath connotation?) (BZ#1980613)

* [AlmaLinux8.4 BUG],RialtoMLK, I915 graphic driver failed to boot with one new 120HZ panel (BZ#1981250)

* act_ct: subject to DNAT tuple collision (BZ#1982494)

Enhancement(s):

* [Lenovo 8.5 FEAT] drivers/nvme - Updat…

bdu:2021-04854

Withdrawn: BELL-CVE-2021-22543 — CVE-2021-22543 does not affect BellSoft software

Withdrawn by the publisher.

certfr-2021-avi-611 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Red Hat. Elles permettent à un attaquant de prov…

certfr-2021-avi-611

EUVD-2026-176037

fkie_cve-2021-22543

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

gsd-2021-22543

OESA-2021-1366 — kernel security update

Affected: openEuler:20.03-LTS-SP1: kernel, openEuler:20.03-LTS-SP2: kernel

The Linux Kernel, the operating system core itself. Security Fix(es): A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in the Linux kernel through 5.13.13.(CVE-2021-40490) A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.(CVE-2021-3653) An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.(CVE-2021-22543)

openSUSE-SU-2021:1142-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

RHSA-2021:3044 — Red Hat Security Advisory: kpatch-patch security update

kernel: race condition in net/can/bcm.c leads to local privilege escalation kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

SUSE-SU-2021:2643-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2021-22543

Affected: Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:Pro:16.04:LTS: linux-oracle, Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux, Ubuntu:18.04:LTS: linux-aws, Ubuntu:18.04:LTS: linux-aws-5.4 and 74 more

WID-SEC-W-2022-0242 — Linux Kernel: Schwachstelle ermöglicht Privilegieneskalation

Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um seine Privilegien zu erhöhen.