RHSA-2021:3801: Important: kernel security and bug fix update

First published: Tue Oct 12 2021(Updated: )

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)</li> <li> kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)</li> <li> kernel: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653)</li> <li> kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)</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> Kernel panic due to double fault with DLM reporting for socket error "sk_err=32/0" (BZ#1834878)</li> <li> "MFW indication via attention" message getting logged frequently after every 5 minutes (BZ#1854544)</li> <li> lpfc fails to discovery in pt2pt with "2754 PRLI failure DID:0000EF Status:x9/x91e00, data: x0" (BZ#1922479)</li> <li> pcpu_get_vm_areas using most memory from VmallocUsed (BZ#1970618)</li> <li> RHEL 7.9.z [qedf driver] Racing condition between qedf_cleanup_fcport and releasing command after timeout (BZ#1982702)</li> <li> [Azure] RHEL 7.9 reports GPU/IB topology incorrectly on some Azure SKUs (BZ#1984128)</li> <li> [stable guest ABI]Hot add CPU after migration cause guest hang (BZ#1991856)</li> <li> i40e driver crash at RIP: i40e_config_vf_promiscuous_mode+0x165 (BZ#1993850)</li> <li> [nfs] Performance issue since commit 5a4f6f11951e (BZ#1995649)</li> <li> [kernel] Indefinite waiting for RCU callback while removing cgroup (BZ#2000973)</li>

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