-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2021:3725-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3725 Issue date: 2021-10-05 CVE Names: CVE-2021-22543 CVE-2021-22555 CVE-2021-32399 CVE-2021-37576 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.4 Advanced Update 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543) * kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555) * kernel: race condition for removal of the HCI controller (CVE-2021-32399) * kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576) 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): * [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1975161) 4. Solution: 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. 5. Bugs fixed (https://bugzilla.redhat.com/): 1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks 1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller 1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c 1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption 6. Package List: Red Hat Enterprise Linux Server AUS (v. 7.4): Source: kernel-3.10.0-693.94.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-693.94.1.el7.noarch.rpm kernel-doc-3.10.0-693.94.1.el7.noarch.rpm x86_64: kernel-3.10.0-693.94.1.el7.x86_64.rpm kernel-debug-3.10.0-693.94.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-693.94.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.94.1.el7.x86_64.rpm kernel-devel-3.10.0-693.94.1.el7.x86_64.rpm kernel-headers-3.10.0-693.94.1.el7.x86_64.rpm kernel-tools-3.10.0-693.94.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-693.94.1.el7.x86_64.rpm perf-3.10.0-693.94.1.el7.x86_64.rpm perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm python-perf-3.10.0-693.94.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.4): x86_64: kernel-debug-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.94.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-693.94.1.el7.x86_64.rpm perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-32399 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYVwEltzjgjWX9erEAQjQYg/8CX6zmfukV5LjGsjGya+kOYfqW75pDasS jpoAC6rtd6n5Y4THU37cTSkHtSk2ycGkUhcnac3FwfOhRp5rR9ToPTVwTwcyQAgQ 4d/bb96Fa11h7duD0KUNXnF2lfvd3u4BRYCcRx43btRhueR4JeAK/7e5BDg3cfHx qMDzoK2ZQsqzzVEqDhmH8Gg97OZoghTYWXIPVZUh4SyGRF/YaqRqRFIUQkHNMdai JWTbgO8wGSs/qnhsWeewUEMr9sXLU80BpbSJl87xE2WvSuN4SWkCLELRUVmIkIv7 cIiyxCY2fpjXkWI1h233pKuGhqnphKP6r7Izjv0XuPSFe8GmJz95iRRLK666kDVh N8OfEAoVNYme6fQaOkUOIq6BAnAdXdK/Q3re5j4Das3kcIgL5X+7cIW4KR6wQlqq FSnYpKTG3s64xLanXQoY4gyWbPmbhPuv4LZDoNSkoNw9e2jSSPz1mX7O0KhooApM OY8+qrRVolk6CvoIQiwTC98R3WLlJ5NM+5SoccPZeqaLSy/dC8i4ZnUwtsppwOiA kuDRQ3s+6XKcdV+o9TesrTwp8KvoiAYHpV8u6GrAmwJyeAUa2ViLfKxhA1E2eogP xnZlC2FuX9ehFhfZxJHBl9s3Vv7KdSJEkGU4aJB1LU/OpVl3zywpz0Zr8vgkuofY ays5ZRJK5SQ= =R/fp -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce