{ "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 kpatch-patch is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.\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": "This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.\n\nSecurity Fix(es):\n\n* kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)\n\n* kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)\n\n* kernel: IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)\n\nFor 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.", "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-2024:0386", "url": "https://access.redhat.com/errata/RHSA-2024:0386" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "2237757", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237757" }, { "category": "external", "summary": "2241924", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241924" }, { "category": "external", "summary": "2244723", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2244723" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_0386.json" } ], "title": "Red Hat Security Advisory: kpatch-patch security update", "tracking": { "current_release_date": "2026-06-28T12:41:47+00:00", "generator": { "date": "2026-06-28T12:41:47+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.2.6" } }, "id": "RHSA-2024:0386", "initial_release_date": "2024-01-24T09:11:37+00:00", "revision_history": [ { "date": "2024-01-24T09:11:37+00:00", "number": "1", "summary": "Initial version" }, { "date": "2024-01-24T09:11:37+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-06-28T12:41:47+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": 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"kpatch-patch-5_14_0-70_80_1-debugsource-0:1-1.el9_0.x86_64", "relates_to_product_reference": "BaseOS-9.0.0.Z.EUS" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-4623", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "discovery_date": "2023-09-06T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2237757" } ], "notes": [ { "category": "description", "text": "A use-after-free flaw was found in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSC_FSC flag set, has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free issue.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: net/sched: sch_hfsc UAF", "title": "Vulnerability summary" }, { "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": [ "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.ppc64le", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.src", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.x86_64", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-debuginfo-0:1-4.el9_0.ppc64le", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-debuginfo-0:1-4.el9_0.x86_64", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-debugsource-0:1-4.el9_0.ppc64le", 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This issue may allow a malicious user to cause a use-after-free and double-free problem, which may permit remote code execution or lead to local privilege escalation.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: use after free in nvmet_tcp_free_crypto in NVMe", "title": "Vulnerability summary" }, { "category": "other", "text": "This vulnerability is actual only for systems where NVME over TCP being used.", "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": [ "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.ppc64le", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.src", "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.x86_64", 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An overflow of the contents from a packet that is too large will overflow into the kernel's ring buffer, leading to a system integrity issue.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: IGB driver inadequate buffer size for frames larger than MTU", "title": "Vulnerability summary" }, { "category": "other", "text": "This flaw is rated as Important because of its nature of exposure to the threat of impacting Confidentiality, Integrity and Availability by an attacker while being in an adjacent physical layer with no privilege required.", "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": [ "BaseOS-9.0.0.Z.EUS:kpatch-patch-5_14_0-70_64_1-0:1-4.el9_0.ppc64le", 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