{ "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 8.\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: Bluetooth: hci_event: call disconnect callback before deleting conn (CVE-2023-53673)\n\n* kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)\n\n* kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)\n\n* kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)\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-2026:1148", "url": "https://access.redhat.com/errata/RHSA-2026:1148" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "2402193", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402193" }, { "category": "external", "summary": "2414494", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414494" }, { "category": "external", "summary": "2418872", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418872" }, { "category": "external", "summary": "2419954", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419954" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_1148.json" } ], "title": "Red Hat Security Advisory: kernel-rt security update", "tracking": { "current_release_date": "2026-03-12T19:03:40+00:00", "generator": { "date": "2026-03-12T19:03:40+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.7.3" } }, "id": "RHSA-2026:1148", "initial_release_date": "2026-01-26T07:50:32+00:00", "revision_history": [ { "date": "2026-01-26T07:50:32+00:00", "number": "1", "summary": "Initial version" }, { "date": "2026-01-26T07:50:32+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-03-12T19:03:40+00:00", 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When an invalid value is passed via the driver’s “quirk” input option, the driver merely logs an error and retains the invalid value, rather than correcting it. This can result in out-of-bounds (OOB) memory access.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping", "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-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.97.1.rt7.438.el8_10.src", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", 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"category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE\n\nThis data originates from userspace and is used in buffer offset\ncalculations which could potentially overflow causing an out-of-bounds\naccess.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE", "title": "Vulnerability summary" }, { "category": "other", "text": "A local attacker with access to the vmwgfx device could trigger an integer overflow when sending crafted SVGA3D command buffers with a malformed header size. The unchecked header->size field is used in buffer offset arithmetic, leading to potential out-of-bounds memory access in the kernel. The patch enforces a maximum bound (SVGA_CMD_MAX_DATASIZE) to prevent overflows. This issue may allow denial of service or privilege escalation within the guest VM.", "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-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.97.1.rt7.438.el8_10.src", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-debuginfo-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", "NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-devel-0:4.18.0-553.97.1.rt7.438.el8_10.x86_64", 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