{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Moderate" }, "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 9.2 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. 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: netfilter: bridge: confirm multicast packets before passing them up the stack (CVE-2024-27415)\n\n* kernel: net: bridge: mst: fix vlan use-after-free (CVE-2024-36979)\n\n* kernel: net: openvswitch: fix overwriting ct original tuple for ICMPv6 (CVE-2024-38558)\n\n* kernel: netfilter: tproxy: bail out if IP has been disabled on the device (CVE-2024-36270)\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-2024:7490", "url": "https://access.redhat.com/errata/RHSA-2024:7490" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#moderate", "url": "https://access.redhat.com/security/updates/classification/#moderate" }, { "category": "external", "summary": "2281101", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281101" }, { "category": "external", "summary": "2293276", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293276" }, { "category": "external", "summary": "2293441", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293441" }, { "category": "external", "summary": "2293653", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293653" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_7490.json" } ], "title": "Red Hat Security Advisory: kernel-rt security update", "tracking": { "current_release_date": "2026-05-04T21:12:59+00:00", "generator": { "date": "2026-05-04T21:12:59+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.7.9" } }, "id": "RHSA-2024:7490", "initial_release_date": "2024-10-02T00:38:12+00:00", "revision_history": [ { "date": "2024-10-02T00:38:12+00:00", "number": "1", "summary": "Initial version" }, { "date": "2024-10-02T00:38:12+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-05-04T21:12:59+00:00", 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The issue arises from a race condition in the connection tracking (conntrack) module when processing cloned socket buffers (skbs) that reference the same connection entry (nf_conn). This condition can lead to system instability or potential security risks.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: netfilter: bridge: confirm multicast packets before passing them up the stack", "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": [ "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.src", "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-core-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-core-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", 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net/ipv4/netfilter/nf_tproxy_ipv4.c:62\nCall Trace:\n nft_tproxy_eval_v4 net/netfilter/nft_tproxy.c:56 [inline]\n nft_tproxy_eval+0xa9a/0x1a00 net/netfilter/nft_tproxy.c:168\n\n__in_dev_get_rcu() can return NULL, so check for this.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: netfilter: tproxy: bail out if IP has been disabled on the device", "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": [ "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.src", "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-core-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", 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This issue may lead to compromised Confidentiality and Integrity, and can crash.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: net: bridge: mst: fix vlan use-after-free", "title": "Vulnerability summary" }, { "category": "other", "text": "Red Hat has determined this vulnerability to be moderate impact, as it is triggered within the bridge vlan processing context, a network-layer operation that mainly affects how vlan states are updated and does not directly/implicitly expose sensitive user-space memory, limiting the confidentiality impact. This processing context does not provide direct control over arbitrary memory writes, limiting the impact to integrity. The most likely result is a kernel panic or crash.", "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": [ "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.src", "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-core-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-core-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-debuginfo-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-devel-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", "NFV-9.2.0.Z.EUS:kernel-rt-debug-kvm-0:5.14.0-284.86.1.rt14.371.el9_2.x86_64", 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"name": "Improper Initialization" }, "discovery_date": "2024-06-19T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2293441" } ], "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: fix overwriting ct original tuple for ICMPv6\n\nOVS_PACKET_CMD_EXECUTE has 3 main attributes:\n - OVS_PACKET_ATTR_KEY - Packet metadata in a netlink format.\n - OVS_PACKET_ATTR_PACKET - Binary packet content.\n - OVS_PACKET_ATTR_ACTIONS - Actions to execute on the packet.\n\nOVS_PACKET_ATTR_KEY is parsed first to populate sw_flow_key structure\nwith the metadata like conntrack state, input port, recirculation id,\netc. Then the packet itself gets parsed to populate the rest of the\nkeys from the packet headers.\n\nWhenever the packet parsing code starts parsing the ICMPv6 header, it\nfirst zeroes out fields in the key corresponding to Neighbor Discovery\ninformation even if it is not an ND packet.\n\nIt is an 'ipv6.nd' field. However, the 'ipv6' is a union that shares\nthe space between 'nd' and 'ct_orig' that holds the original tuple\nconntrack metadata parsed from the OVS_PACKET_ATTR_KEY.\n\nND packets should not normally have conntrack state, so it's fine to\nshare the space, but normal ICMPv6 Echo packets or maybe other types of\nICMPv6 can have the state attached and it should not be overwritten.\n\nThe issue results in all but the last 4 bytes of the destination\naddress being wiped from the original conntrack tuple leading to\nincorrect packet matching and potentially executing wrong actions\nin case this packet recirculates within the datapath or goes back\nto userspace.\n\nND fields should not be accessed in non-ND packets, so not clearing\nthem should be fine. Executing memset() only for actual ND packets to\navoid the issue.\n\nInitializing the whole thing before parsing is needed because ND packet\nmay not contain all the options.\n\nThe issue only affects the OVS_PACKET_CMD_EXECUTE path and doesn't\naffect packets entering OVS datapath from network interfaces, because\nin this case CT metadata is populated from skb after the packet is\nalready parsed.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: net: openvswitch: fix overwriting ct original tuple for ICMPv6", "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": [ "NFV-9.2.0.Z.EUS:kernel-rt-0:5.14.0-284.86.1.rt14.371.el9_2.src", 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