Issued:

2024-04-16

Updated:

2024-04-16

RHSA-2024:1831 - Important: kernel security update

Synopsis

Important: kernel security update

Type/Severity

Security Advisory Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support.

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.

Description

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

Security Fix(es):

• kernel: out-of-bounds write in qfq_change_class function (CVE-2023-31436)
• kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead (CVE-2023-3611)
• kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)
• kernel: use-after-free in sch_qfq network scheduler (CVE-2023-4921)

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.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

Updated Packages

• perf-debuginfo-2.6.32-754.53.1.el6.i686.rpm
• kernel-debuginfo-common-i686-2.6.32-754.53.1.el6.i686.rpm
• kernel-debug-2.6.32-754.53.1.el6.i686.rpm
• kernel-abi-whitelists-2.6.32-754.53.1.el6.noarch.rpm
• kernel-firmware-2.6.32-754.53.1.el6.noarch.rpm
• kernel-debuginfo-2.6.32-754.53.1.el6.i686.rpm
• kernel-debug-devel-2.6.32-754.53.1.el6.s390x.rpm
• kernel-debug-devel-2.6.32-754.53.1.el6.x86_64.rpm
• kernel-kdump-2.6.32-754.53.1.el6.s390x.rpm
• python-perf-2.6.32-754.53.1.el6.i686.rpm
• kernel-debug-2.6.32-754.53.1.el6.s390x.rpm
• python-perf-2.6.32-754.53.1.el6.s390x.rpm
• kernel-2.6.32-754.53.1.el6.s390x.rpm
• kernel-devel-2.6.32-754.53.1.el6.i686.rpm
• kernel-debuginfo-2.6.32-754.53.1.el6.x86_64.rpm
• kernel-devel-2.6.32-754.53.1.el6.x86_64.rpm
• perf-debuginfo-2.6.32-754.53.1.el6.x86_64.rpm
• kernel-doc-2.6.32-754.53.1.el6.noarch.rpm
• kernel-2.6.32-754.53.1.el6.x86_64.rpm
• python-perf-debuginfo-2.6.32-754.53.1.el6.i686.rpm
• kernel-debuginfo-common-s390x-2.6.32-754.53.1.el6.s390x.rpm
• kernel-debug-debuginfo-2.6.32-754.53.1.el6.x86_64.rpm
• python-perf-2.6.32-754.53.1.el6.x86_64.rpm
• kernel-headers-2.6.32-754.53.1.el6.s390x.rpm
• kernel-2.6.32-754.53.1.el6.i686.rpm
• kernel-headers-2.6.32-754.53.1.el6.i686.rpm
• kernel-debug-devel-2.6.32-754.53.1.el6.i686.rpm
• python-perf-debuginfo-2.6.32-754.53.1.el6.x86_64.rpm
• perf-2.6.32-754.53.1.el6.s390x.rpm
• kernel-debuginfo-common-x86_64-2.6.32-754.53.1.el6.x86_64.rpm
• kernel-debuginfo-2.6.32-754.53.1.el6.s390x.rpm
• kernel-debug-debuginfo-2.6.32-754.53.1.el6.i686.rpm
• kernel-devel-2.6.32-754.53.1.el6.s390x.rpm
• kernel-2.6.32-754.53.1.el6.src.rpm
• python-perf-debuginfo-2.6.32-754.53.1.el6.s390x.rpm
• kernel-debug-debuginfo-2.6.32-754.53.1.el6.s390x.rpm
• perf-debuginfo-2.6.32-754.53.1.el6.s390x.rpm
• kernel-debug-2.6.32-754.53.1.el6.x86_64.rpm
• kernel-kdump-devel-2.6.32-754.53.1.el6.s390x.rpm
• kernel-headers-2.6.32-754.53.1.el6.x86_64.rpm
• perf-2.6.32-754.53.1.el6.i686.rpm
• kernel-kdump-debuginfo-2.6.32-754.53.1.el6.s390x.rpm
• perf-2.6.32-754.53.1.el6.x86_64.rpm

Fixes

• This content is not included.BZ - 2192671
• This content is not included.BZ - 2225097
• This content is not included.BZ - 2225191
• This content is not included.BZ - 2245514

CVEs

• CVE-2023-3611
• CVE-2023-3776
• CVE-2023-4921
• CVE-2023-31436

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.