CVE-2021-46953

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Even more, should the firmware report an illegal interrupt\nnumber that overlaps with the GIC SGI range, this can result in an\nIPI being unmapped, and subsequent fireworks (as reported by Dann\nFrazier).\n\nRework the driver to have a slightly saner behaviour and actually\ncheck whether the interrupt has been mapped before unmapping things."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/acpi/arm64/gtdt.c"], "versions": [{"version": "ca9ae5ec4ef0ed13833b03297ab319676965492c", "lessThan": "c3385a9122f8db15b453e07bfc88117fce7f3724", "status": "affected", "versionType": "git"}, {"version": "ca9ae5ec4ef0ed13833b03297ab319676965492c", "lessThan": "7b2162db1498c71962a4bb2f776fa4e76d4d305b", "status": "affected", "versionType": "git"}, {"version": "ca9ae5ec4ef0ed13833b03297ab319676965492c", "lessThan": "504632a3577a049dd9bb7aabae5b4476f9c586b4", 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Even more, should the firmware report an illegal interrupt\nnumber that overlaps with the GIC SGI range, this can result in an\nIPI being unmapped, and subsequent fireworks (as reported by Dann\nFrazier).\n\nRework the driver to have a slightly saner behaviour and actually\ncheck whether the interrupt has been mapped before unmapping things."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ACPI: GTDT: no corrompe las asignaciones de interrupciones en caso de falla de la sonda de vigilancia. Cuando falla la sonda del controlador debido a propiedades de firmware no v\u00e1lidas, el controlador GTDT desasigna la interrupci\u00f3n que asign\u00f3 anteriormente. Sin embargo, nunca comprueba si el mapeo de la interrupci\u00f3n realmente tuvo \u00e9xito. A\u00fan m\u00e1s, si el firmware informa un n\u00famero de interrupci\u00f3n ilegal que se superpone con el rango GIC SGI, esto puede resultar en que un IPI no se asigne y en posteriores fuegos artificiales (seg\u00fan lo informado por Dann Frazier). Vuelva a trabajar el controlador para que tenga un comportamiento un poco m\u00e1s sensato y verifique si la interrupci\u00f3n se ha asignado antes de desasignar las cosas."}], "id": "CVE-2021-46953", "lastModified": "2026-06-17T04:15:57.903", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-46953", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:01:41.363644Z", "version": "2.0.3"}}]}, "published": "2024-02-27T19:04:06.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure", "id": "2266471", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266471"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure\nWhen failing the driver probe because of invalid firmware properties,\nthe GTDT driver unmaps the interrupt that it mapped earlier.\nHowever, it never checks whether the mapping of the interrupt actially\nsucceeded. Even more, should the firmware report an illegal interrupt\nnumber that overlaps with the GIC SGI range, this can result in an\nIPI being unmapped, and subsequent fireworks (as reported by Dann\nFrazier).\nRework the driver to have a slightly saner behaviour and actually\ncheck whether the interrupt has been mapped before unmapping things."], "name": "CVE-2021-46953", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-46953\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-46953\nhttps://lore.kernel.org/linux-cve-announce/20240227184057.2368370-18-gregkh@linuxfoundation.org/T/#u"], "threat_severity": "Low"}

{}