Red Hat Security Advisory

RHSA-2021:3057

kernel security, bug fix, and enhancement update

Released 2021-08-10 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-305.12.1.el8_4
Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-305.12.1.el8_4, kernel-4.18.0-305.12.1.el8_4, kernel-abi-stablelists-4.18.0-305.12.1.el8_4 +19

Fixes 3 records

TI-2021-05514 CVE-2021-22555

Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE

CRITICAL 95KEV

A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c.

CVSS 3.1HIGH 8.3 Adjacent network No auth No interaction EPSS 0.78684 Published 2021-07-07 Partial fix CWE-787

TI-2021-05506 CVE-2021-22543

Improper memory handling in Linux KVM

LOW 39

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.

CVSS 4.0HIGH 8.7 Local Low privileges No interaction EPSS 0.0066 Published 2021-05-26 Partial fix CWE-119

TI-2021-02555 CVE-2021-3609 · GHSA-rv9w-mxpp-hwhj

Race condition in kernel

LOW 31

.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the CAN subsystem to corrupt memory, crash the system or escalate privileges.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00431 Published 2022-03-03 Partial fix CWE-362