RHSA-2021:3987: Important: kernel security and bug fix update
First published: Tue Oct 26 2021(Updated: )
The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)</li> <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: use-after-free in show_numa_stats function (CVE-2019-20934)</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> A race between i40e_ndo_set_vf_mac() and i40e_vsi_clear() in the i40e driver causes a use after free condition of the kmalloc-4096 slab cache. (BZ#1980333)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/bpftool | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/bpftool-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-abi-whitelists | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debug | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debug-devel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-devel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-doc | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-headers | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools-libs | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/perf | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/perf-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/python-perf | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/python-perf-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/bpftool | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/bpftool-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-bootwrapper | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debug | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debug-devel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-debuginfo-common-ppc64le | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-devel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-headers | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools-libs | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/perf | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/perf-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/python-perf | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
| redhat/python-perf-debuginfo | <3.10.0-1062.59.1.el7 | 3.10.0-1062.59.1.el7 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1902788
- https://bugzilla.redhat.com/show_bug.cgi?id=1965461
- https://bugzilla.redhat.com/show_bug.cgi?id=1974319
- https://bugzilla.redhat.com/show_bug.cgi?id=1983686
- https://bugzilla.redhat.com/show_bug.cgi?id=1983988
- https://bugzilla.redhat.com/show_bug.cgi?id=1986506
- https://access.redhat.com/security/updates/classification/#important
- https://access.redhat.com/errata/RHSA-2021:3987 (Advisory)
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- anchor-id/RHSA-2021:3987
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