{ "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 linux-firmware is now available for Red Hat Enterprise Linux 8.1 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": "The linux-firmware packages contain all of the firmware files that are required by various devices to operate.\n\nSecurity Fix(es):\n\n* hardware: buffer overflow in bluetooth firmware (CVE-2020-12321)\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-2021:0183", "url": "https://access.redhat.com/errata/RHSA-2021:0183" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1893914", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1893914" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_0183.json" } ], "title": "Red Hat Security Advisory: linux-firmware security update", "tracking": { "current_release_date": "2025-11-21T18:19:50+00:00", "generator": { "date": "2025-11-21T18:19:50+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.6.12" } }, "id": "RHSA-2021:0183", "initial_release_date": "2021-01-19T12:38:11+00:00", "revision_history": [ { "date": "2021-01-19T12:38:11+00:00", "number": "1", "summary": "Initial version" }, { "date": "2021-01-19T12:38:11+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2025-11-21T18:19:50+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 BaseOS EUS (v. 8.1)", "product": { "name": "Red Hat Enterprise Linux BaseOS EUS (v. 8.1)", "product_id": 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"BaseOS-8.1.0.Z.EUS:iwl6050-firmware-0:41.28.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl7260-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8686-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8787-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-firmware-2:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-olpc-firmware-0:20190516-96.git711d3297.el8_1.noarch" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1893914" } ], "notes": [ { "category": "description", "text": "A flaw was found in the firmware of some Intel Bluetooth devices. This may allow an unauthenticated attacker within Bluetooth range to overflow a buffer and corrupt memory leading to a crash or privilege escalation.", "title": "Vulnerability description" }, { "category": "summary", "text": "hardware: buffer overflow in bluetooth firmware", "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-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.src" ], "known_not_affected": [ "BaseOS-8.1.0.Z.EUS:iwl100-firmware-0:39.31.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl1000-firmware-1:39.31.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl105-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl135-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl2000-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl2030-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl3160-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl3945-firmware-0:15.32.2.9-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl4965-firmware-0:228.61.2.24-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl5000-firmware-0:8.83.5.1_1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl5150-firmware-0:8.24.2.2-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000-firmware-0:9.221.4.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000g2a-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000g2b-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6050-firmware-0:41.28.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl7260-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8686-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8787-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-firmware-2:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-olpc-firmware-0:20190516-96.git711d3297.el8_1.noarch" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2020-12321" }, { "category": "external", "summary": "RHBZ#1893914", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1893914" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2020-12321", "url": "https://www.cve.org/CVERecord?id=CVE-2020-12321" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-12321", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12321" }, { "category": "external", "summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00403.html", "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00403.html" } ], "release_date": "2020-11-10T13:55:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2021-01-19T12:38:11+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.src" ], "restart_required": { "category": "machine" }, "url": "https://access.redhat.com/errata/RHSA-2021:0183" }, { "category": "workaround", "details": "To mitigate these vulnerabilities on the operating system level, disable the Bluetooth functionality via blocklisting kernel modules in the Linux kernel. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. Instructions on how to disable Bluetooth modules are available on the Customer Portal at https://access.redhat.com/solutions/2682931.\n\nAlternatively, Bluetooth can be disabled within the hardware or at BIOS level which will also provide an effective mitigation as the kernel will not be able to detect that Bluetooth hardware is present on the system.", "product_ids": [ "BaseOS-8.1.0.Z.EUS:iwl100-firmware-0:39.31.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl1000-firmware-1:39.31.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl105-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl135-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl2000-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl2030-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl3160-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl3945-firmware-0:15.32.2.9-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl4965-firmware-0:228.61.2.24-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl5000-firmware-0:8.83.5.1_1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl5150-firmware-0:8.24.2.2-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000-firmware-0:9.221.4.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000g2a-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000g2b-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6050-firmware-0:41.28.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl7260-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8686-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8787-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-firmware-2:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-olpc-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.src" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "BaseOS-8.1.0.Z.EUS:iwl100-firmware-0:39.31.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl1000-firmware-1:39.31.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl105-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl135-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl2000-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl2030-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl3160-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl3945-firmware-0:15.32.2.9-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl4965-firmware-0:228.61.2.24-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl5000-firmware-0:8.83.5.1_1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl5150-firmware-0:8.24.2.2-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000-firmware-0:9.221.4.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000g2a-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6000g2b-firmware-0:18.168.6.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl6050-firmware-0:41.28.5.1-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:iwl7260-firmware-1:25.30.13.0-96.el8_1.1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8686-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-sd8787-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-firmware-2:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:libertas-usb8388-olpc-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.noarch", "BaseOS-8.1.0.Z.EUS:linux-firmware-0:20190516-96.git711d3297.el8_1.src" ] } ], "threats": [ { "category": "impact", "details": "Important" } ], "title": "hardware: buffer overflow in bluetooth firmware" } ] }