{ "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* A flaw was found in the Linux kernel's key management system where it was possible for an attacker to escalate privileges or crash the machine. If a user key gets negatively instantiated, an error code is cached in the payload area. A negatively instantiated key may be then be positively instantiated by updating it with valid data. However, the ->update key type method must be aware that the error code may be there. (CVE-2015-8539, Important)\n\n* It was found that fanout_add() in 'net/packet/af_packet.c' in the Linux kernel, before version 4.13.6, allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free bug. (CVE-2017-15649, Important)\n\n* A vulnerability was found in the Linux kernel where the keyctl_set_reqkey_keyring() function leaks the thread keyring. This allows an unprivileged local user to exhaust kernel memory and thus cause a DoS. (CVE-2017-7472, Moderate)\n\nRed Hat would like to thank Dmitry Vyukov of Google engineering for reporting CVE-2015-8539.\n\nBug Fix(es):\n\n* The kernel-rt packages have been upgraded to 3.10.0-693.15.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1519506)", "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-2018:0152", "url": "https://access.redhat.com/errata/RHSA-2018:0152" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1284450", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1284450" }, { "category": "external", "summary": "1442086", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1442086" }, { "category": "external", "summary": "1504574", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1504574" }, { "category": "external", "summary": "1519506", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1519506" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2018/rhsa-2018_0152.json" } ], "title": "Red Hat Security Advisory: kernel-rt security and bug fix update", "tracking": { "current_release_date": "2025-11-21T18:03:36+00:00", "generator": { "date": "2025-11-21T18:03:36+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.6.12" } }, "id": "RHSA-2018:0152", "initial_release_date": "2018-01-25T11:18:22+00:00", "revision_history": [ { "date": "2018-01-25T11:18:22+00:00", "number": "1", "summary": "Initial version" }, { "date": "2018-01-25T11:18:22+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2025-11-21T18:03:36+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-7.4.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-7.4.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-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "product": { "name": 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"vulnerabilities": [ { "acknowledgments": [ { "names": [ "Dmitry Vyukov" ], "organization": "Google engineering" } ], "cve": "CVE-2015-8539", "cwe": { "id": "CWE-667", "name": "Improper Locking" }, "discovery_date": "2015-11-20T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1284450" } ], "notes": [ { "category": "description", "text": "A flaw was found in the Linux kernel's key management system where it was possible for an attacker to escalate privileges or crash the machine. If a user key gets negatively instantiated, an error code is cached in the payload area. A negatively instantiated key may be then be positively instantiated by updating it with valid data. However, the ->update key type method must be aware that the error code may be there.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: local privesc in key management", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4 and 5. This issue does affect the kernels shipped with Red Hat Enterprise Linux 6, 7, MRG-2 and realtime kernels and plans to be addressed in a future update.", "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-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.src", "7Server-NFV-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-devel-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-0:3.10.0-693.17.1.rt56.636.el7.x86_64", 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This allows an unprivileged local user to exhaust kernel memory and thus cause a DoS.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: keyctl_set_reqkey_keyring() leaks thread keyrings", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 as the code with the flaw is not present in this product.\n\nThis issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2. Future Linux kernel updates for the respective releases might 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-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.src", "7Server-NFV-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-devel-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", 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"category": "description", "text": "A flaw was found in the Linux kernel's implementation of associative arrays introduced in 3.13. This functionality was backported to the 3.10 kernels in Red Hat Enterprise Linux 7. The flaw involved a null pointer dereference in assoc_array_apply_edit() due to incorrect node-splitting in assoc_array implementation. This affects the keyring key type and thus key addition and link creation operations may cause the kernel to panic.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: Null pointer dereference due to incorrect node-splitting in assoc_array implementation", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6.\n\nThis issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7,MRG-2 and realtime kernels. Future Linux kernel updates for the respective releases 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-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.src", "7Server-NFV-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-devel-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", 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Enterprise Linux 7 and MRG-2. Future updates for the respective releases 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-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.src", "7Server-NFV-7.4.Z:kernel-rt-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-devel-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-0:3.10.0-693.17.1.rt56.636.el7.x86_64", "7Server-NFV-7.4.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-693.17.1.rt56.636.el7.x86_64", 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