Important: kernel security and bug fix update

标题

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.

描述

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

Security Fix(es):

• kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak (CVE-2022-1012)
• kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-32250)

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):

• Softirq hrtimers are being placed on the per-CPU softirq clocks on isolcpu’s. (BZ#2090484)
• enable/disable multiqueues repeatedly while ping local host, guest kernel panic (BZ#2093416)
• Backport kernel audit enhancements and fixes from v5.13-rc1 to v5.16-rc6 (BZ#2095434)
• blk_update_request: I/O error, dev nvme0n3, during xfs creation (BZ#2100150)
• SCSI updates for RHEL 8.7 (BZ#2100254)
• Kernel bug on mm/slub.c:314 (BZ#2102251)
• Implement new tc action for check_pkt_len (BZ#2102333)
• too long timeout value with TIME_WAIT status of conntrack entry (BZ#2104002)
• Connectx6-DX, mlx5 , backport 087032ee7021 ("net/mlx5e: TC, Fix ct_clear overwriting ct action metadata") (BZ#2104012)
• mlx5: Software steering memory allocation failure, netperf TCP_CRR with ct(). (BZ#2104013)
• tcp: request_sock leak in Calico OCP (BZ#2104670)

解决方案

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.

受影响的产品

• Red Hat Virtualization Host 4 for RHEL 8 x86_64

修复

• BZ - 2064604 - CVE-2022-1012 kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak
• BZ - 2092427 - CVE-2022-32250 kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root

CVE

• CVE-2022-1012
• CVE-2022-32250

参考

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