RHSA-2022:5626: Important: kernel security and bug fix update

First published: Tue Jul 19 2022(Updated: )

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak (CVE-2022-1012)</li> <li> kernel: race condition in perf_event_open leads to privilege escalation (CVE-2022-1729)</li> <li> kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-32250)</li> <li> kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197)</li> <li> kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203)</li> <li> kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check (CVE-2020-29368)</li> 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.<br>Bug Fix(es):<br><li> Failed to reboot after crash trigger (BZ#2060747)</li> <li> conntrack entries linger around after test (BZ#2066357)</li> <li> Enable nested virtualization (BZ#2079070)</li> <li> slub corruption during LPM of hnv interface (BZ#2081251)</li> <li> sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35 (BZ#2082091)</li> <li> Backport request of "genirq: use rcu in kstat_irqs_usr()" (BZ#2083309)</li> <li> ethtool -L may cause system to hang (BZ#2083323)</li> <li> For isolated CPUs (with nohz_full enabled for isolated CPUs) CPU utilization statistics are not getting reflected continuously (BZ#2084139)</li> <li> Affinity broken due to vector space exhaustion (BZ#2084647)</li> <li> kernel memory leak while freeing nested actions (BZ#2086597)</li> <li> sync rhel-8.6 with upstream 5.13 through 5.16 fixes and improvements (BZ#2088037)</li> <li> Kernel panic possibly when cleaning namespace on pod deletion (BZ#2089539)</li> <li> Softirq hrtimers are being placed on the per-CPU softirq clocks on isolcpu’s. (BZ#2090485)</li> <li> fix missed wake-ups in rq_qos_throttle try two (BZ#2092076)</li> <li> NFS4 client experiencing IO outages while sending duplicate SYNs and erroneous RSTs during connection reestablishment (BZ#2094334)</li> <li> using __this_cpu_read() in preemptible [00000000] code: kworker/u66:1/937154 (BZ#2095775)</li> <li> Need some changes in RHEL8.x kernels. (BZ#2096932)</li>

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