-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2021:3328-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3328 Issue date: 2021-08-31 CVE Names: CVE-2021-22555 CVE-2021-29154 CVE-2021-29650 CVE-2021-32399 ===================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 7. 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 for Real Time (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, 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: 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: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154) * kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS (CVE-2021-29650) 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: update to the latest RHEL7.9.z8 source tree (BZ#1982927) 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/): 1945388 - CVE-2021-29650 kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS 1946684 - CVE-2021-29154 kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation 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 6. Package List: Red Hat Enterprise Linux for Real Time for NFV (v. 7): Source: kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.src.rpm noarch: kernel-rt-doc-3.10.0-1160.41.1.rt56.1181.el7.noarch.rpm x86_64: kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm Red Hat Enterprise Linux for Real Time (v. 7): Source: kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.src.rpm noarch: kernel-rt-doc-3.10.0-1160.41.1.rt56.1181.el7.noarch.rpm x86_64: kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.41.1.rt56.1181.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-2021-22555 https://access.redhat.com/security/cve/CVE-2021-29154 https://access.redhat.com/security/cve/CVE-2021-29650 https://access.redhat.com/security/cve/CVE-2021-32399 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 iQIVAwUBYS3zCNzjgjWX9erEAQjCvA/8CYmTP8JzZTti4UgGMSp+uEDig88vtIkk x3B+Xr2ozZ3NinezlmnCr8QLeMA2fP/yPV9rbdCYtFzeaEwiCJgY/WRwKKXOMNAL K7H8fV1rSOJxtBnkIa+x5MRlqvvVAzkIlyDGpFEs7UsI3FFK2o/xL5ZeB7NvTfsd 3zrkCa3pQKYADyN1hmaBw2rxHgUe2nCrpJ4u0+YgyHuVDE7ZDb7pftYcVDzkRdmE t/eqL3u9x3wbLq5VhoUdaiQojdVkFAW5A5p8x8HtiJalcDEkyckrx6tKUG8cN7Yx R0x/O106t6LiFaNdP1wJeYjC10pT1Gm7nmgM4LHwCXfJe4McX+9saOiu614OJq0F zrEpTO+W/WtpLrAS08KDDeQr9K1B+Aqz9JxLrvjx9rbxQGDXSLCoEVkOR37QARsB 3Bbt7FPBU8T8Yv4ai+s5afU9oGE3tSQ2hTq+nyeOKHT0YQoUGEbXiJMTsoJfWriQ tHeUCt/iakMkA/lQnCrQ1bJox58zSfALOgPM3nvTLCWcD2Ls27B+tobXVg1p/izv VEwNb/i3bTbtBTuYB5cUN9jfPjYcHTEA8HyfgaG9DdQRM7yln7RUr4reh5GgT/K0 5LotqxNGBDCtQDDr1jHCXQ1ZtwH4z//NRxP3qJDicsPTS71XStIx1BvoF280LDJB UzzHYdfnUXk= =WCEt -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce