-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2021:1081-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:1081 Issue date: 2021-04-06 CVE Names: CVE-2020-0466 CVE-2020-27152 CVE-2020-28374 CVE-2021-3347 CVE-2021-26708 CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 ==================================================================== 1. Summary: An update for kernel-rt 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux Real Time (v. 8) - x86_64 Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64 3. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466) * kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374) * kernel: Use after free via PI futex state (CVE-2021-3347) * kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708) * kernel: out-of-bounds read in libiscsi module (CVE-2021-27364) * kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365) * Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152) * kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363) 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): * kernel-rt possible livelock: WARNING: CPU: 28 PID: 3109 at kernel/ptrace.c:242 ptrace_check_attach+0xdd/0x1a0 (BZ#1925308) * kernel-rt: update RT source tree to the RHEL-8.3.z3 source tree (BZ#1926369) 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/): 1888886 - CVE-2020-27152 Kernel: KVM: host stack overflow due to lazy update IOAPIC 1899804 - CVE-2020-28374 kernel: SCSI target (LIO) write to any block on ILO backstore 1920480 - CVE-2020-0466 kernel: use after free in eventpoll.c may lead to escalation of privilege 1922249 - CVE-2021-3347 kernel: Use after free via PI futex state 1925588 - CVE-2021-26708 kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c 1926369 - kernel-rt: update RT source tree to the RHEL-8.3.z3 source tree 1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem 1930079 - CVE-2021-27363 kernel: iscsi: unrestricted access to sessions and handles 1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module 6. Package List: Red Hat Enterprise Linux Real Time for NFV (v. 8): Source: kernel-rt-4.18.0-240.22.1.rt7.77.el8_3.src.rpm x86_64: kernel-rt-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-core-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-core-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-devel-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-kvm-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-modules-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debuginfo-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-devel-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-kvm-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-modules-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-modules-extra-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm Red Hat Enterprise Linux Real Time (v. 8): Source: kernel-rt-4.18.0-240.22.1.rt7.77.el8_3.src.rpm x86_64: kernel-rt-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-core-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-core-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-devel-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-modules-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debuginfo-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-devel-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-modules-4.18.0-240.22.1.rt7.77.el8_3.x86_64.rpm kernel-rt-modules-extra-4.18.0-240.22.1.rt7.77.el8_3.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-2020-0466 https://access.redhat.com/security/cve/CVE-2020-27152 https://access.redhat.com/security/cve/CVE-2020-28374 https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/cve/CVE-2021-26708 https://access.redhat.com/security/cve/CVE-2021-27363 https://access.redhat.com/security/cve/CVE-2021-27364 https://access.redhat.com/security/cve/CVE-2021-27365 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 iQIVAwUBYGxpNtzjgjWX9erEAQgpJg//W6iBKw5074KsHQzIOPiURc3w69o9gyIs yE7H0cLNIlUbfwMviXftPJzbPxAwasrqB7hQEcc9mqGFlxefWYCBBOSOkBn8wx9o +7bE6ZIKSEIN9rdHERsZdPMmP/kHbUmRgdo61jjZyQuUFfIZgjvJr8HkbeCEVzry TXqn4l5z230kRndXYO1hKIiWYCxMklKA0DY76CqPkAFMiLYf81TGY9cXdmvuBWkW TX42ufpPELH1E1z2x3DvsN4xK/wn6QPY3OYzEMk29C1LuKfylbXlGayL0eQNQAji UlE49OCvIeToqS4xCwlQTtOSDGtZkGX9WFpBXt8EGnJ/YDMRoxpxSYgqemqfDr+X XVhDcgXoAU5l+GJPD45dIWq7Gh/eAXZFV+jz4FtMU1oL2w+lR/eGCChEDG2GwTgl s9MhSz6BswbAWqdWYnAlzlcp/u7HsIku2a0puAJDpZO2TU1MPkitr3sHSc2XnCtg b8kbGtrS8QS9VckSGMAviuOZgpNDHKYTMGobyU5vnfgPPjhH3Z14CUoogGgVNvoA 3BdtyzVfB9uHhSSoRaLggUrOoPAxvlc5nfKGaFTyDkbVWmqOPdDPi7/Z6wJXwEkw vo6ExIPYJiAb05SuY+X0cJkCezokU8K5N0wFhj89t+BAbj5/IMiir2wwYGif4Hsb AAihwVSfz0U=X3VJ -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce