{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 7.\n\nRed 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.", "title": "Topic" }, { "category": "general", "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* Kernel: KVM: error in exception handling leads to wrong debug stack value (CVE-2018-1087)\n\n* Kernel: error in exception handling leads to DoS (CVE-2018-8897)\n\n* Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation (CVE-2017-16939)\n\n* kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c (CVE-2018-1068)\n\n* kernel: ptrace() incorrect error handling leads to corruption and DoS (CVE-2018-1000199)\n\nFor more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.\n\nRed Hat would like to thank Andy Lutomirski for reporting CVE-2018-1087 and CVE-2018-1000199 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting CVE-2018-8897.\n\nBug Fix(es):\n\n* The kernel-rt packages have been upgraded to the 3.10.0-862.2.3 source tree, which provides a number of bug fixes over the previous version. (BZ#1549768)", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2018:1355", "url": "https://access.redhat.com/errata/RHSA-2018:1355" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "https://access.redhat.com/security/vulnerabilities/pop_ss", "url": "https://access.redhat.com/security/vulnerabilities/pop_ss" }, { "category": "external", "summary": "1517220", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1517220" }, { "category": "external", "summary": "1549768", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1549768" }, { "category": "external", "summary": "1552048", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1552048" }, { "category": "external", "summary": "1566837", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1566837" }, { "category": "external", "summary": "1567074", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1567074" }, { "category": "external", "summary": "1568477", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1568477" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2018/rhsa-2018_1355.json" } ], "title": "Red Hat Security Advisory: kernel-rt security and bug fix update", "tracking": { "current_release_date": "2026-06-30T11:35:12+00:00", "generator": { "date": "2026-06-30T11:35:12+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.3.1" } }, "id": "RHSA-2018:1355", "initial_release_date": "2018-05-08T22:24:51+00:00", "revision_history": [ { "date": "2018-05-08T22:24:51+00:00", "number": "1", "summary": "Initial version" }, { "date": "2018-05-08T22:24:51+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-06-30T11:35:12+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux for Real Time for NFV (v. 7)", "product": { "name": "Red Hat Enterprise Linux for Real Time for NFV (v. 7)", "product_id": "7Server-NFV-7.5.Z", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_extras_rt:7" } } }, { "category": "product_name", "name": "Red Hat Enterprise Linux Realtime (v. 7)", "product": { "name": "Red Hat Enterprise Linux Realtime (v. 7)", "product_id": "7Server-RT-7.5.Z", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_extras_rt:7" } } } ], "category": "product_family", "name": "Red Hat Enterprise Linux" }, { "branches": [ { "category": "product_version", "name": "kernel-rt-trace-kvm-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "product": { "name": "kernel-rt-trace-kvm-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "product_id": "kernel-rt-trace-kvm-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kernel-rt-trace-kvm@3.10.0-862.2.3.rt56.806.el7?arch=x86_64" } } }, { "category": "product_version", "name": "kernel-rt-debug-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "product": { "name": "kernel-rt-debug-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "product_id": "kernel-rt-debug-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "product_identification_helper": { "purl": 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This vulnerability occurs while closing a xfrm netlink socket in xfrm_dump_policy_done. A user/process could abuse this flaw to potentially escalate their privileges on a system.", "title": "Vulnerability description" }, { "category": "summary", "text": "Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.\n\nThis issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 may address this issue.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "7Server-NFV-7.5.Z:kernel-rt-0:3.10.0-862.2.3.rt56.806.el7.src", "7Server-NFV-7.5.Z:kernel-rt-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-devel-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-kvm-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", 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During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.", "title": "Vulnerability description" }, { "category": "summary", "text": "Kernel: KVM: error in exception handling leads to wrong debug stack value", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG 2.\n\nThis issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7. Future kernel updates for Red Hat Enterprise Linux 7 may address this issue.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "7Server-NFV-7.5.Z:kernel-rt-0:3.10.0-862.2.3.rt56.806.el7.src", "7Server-NFV-7.5.Z:kernel-rt-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-devel-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-kvm-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", 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While modifying a h/w breakpoint via 'modify_user_hw_breakpoint' routine, an unprivileged user/process could use this flaw to crash the system kernel resulting in DoS OR to potentially escalate privileges on a the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: ptrace() incorrect error handling leads to corruption and DoS", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.\n\nThis issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 may address this issue.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "7Server-NFV-7.5.Z:kernel-rt-0:3.10.0-862.2.3.rt56.806.el7.src", "7Server-NFV-7.5.Z:kernel-rt-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-devel-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-kvm-0:3.10.0-862.2.3.rt56.806.el7.x86_64", "7Server-NFV-7.5.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-862.2.3.rt56.806.el7.x86_64", 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