CVE-2021-46918 - Vulnerability Details - OpenCVE

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: clear MSIX permission entry on shutdown Add disabling/clearing of MSIX permission entries on device shutdown to mirror the enabling of the MSIX entries on probe. Current code left the MSIX enabled and the pasid entries still programmed at device shutdown.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Linux	Linux Kernel

Configuration 1 [-]

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997
https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500
https://nvd.nist.gov/vuln/detail/CVE-2021-46918
https://www.cve.org/CVERecord?id=CVE-2021-46918

History

No history.

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-02-27T06:53:56.082Z

Updated: 2025-05-04T07:00:20.114Z

Reserved: 2024-02-25T13:45:52.719Z

Link: CVE-2021-46918

Vulnrichment

Updated: 2024-08-04T05:17:42.978Z

NVD

Status : Modified

Published: 2024-02-27T07:15:08.540

Modified: 2024-11-21T06:34:55.823

Link: CVE-2021-46918

Redhat

Severity : Low

Publid Date: 2024-02-27T00:00:00Z

Links: CVE-2021-46918 - Bugzilla

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-46918", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:45:52.719Z", "datePublished": "2024-02-27T06:53:56.082Z", "dateUpdated": "2025-05-04T07:00:20.114Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:00:20.114Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: clear MSIX permission entry on shutdown\n\nAdd disabling/clearing of MSIX permission entries on device shutdown to\nmirror the enabling of the MSIX entries on probe. Current code left the\nMSIX enabled and the pasid entries still programmed at device shutdown."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/idxd/device.c", "drivers/dma/idxd/idxd.h", "drivers/dma/idxd/init.c"], "versions": [{"version": "8e50d392652f20616a136165dff516b86baf5e49", "lessThan": "c84b8982d7aa9b4717dc36a1c6cbc93ee153b500", "status": "affected", "versionType": "git"}, {"version": "8e50d392652f20616a136165dff516b86baf5e49", "lessThan": "6df0e6c57dfc064af330071f372f11aa8c584997", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/idxd/device.c", "drivers/dma/idxd/idxd.h", "drivers/dma/idxd/init.c"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.11.16", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.11.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500"}, {"url": "https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997"}], "title": "dmaengine: idxd: clear MSIX permission entry on shutdown", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-46918", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-02-27T15:50:31.475929Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:22:01.062Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:42.978Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:42.978Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-46918", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-02-27T15:50:31.475929Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T15:20:40.943Z"}}], "cna": {"title": "dmaengine: idxd: clear MSIX permission entry on shutdown", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8e50d392652f20616a136165dff516b86baf5e49", "lessThan": "c84b8982d7aa9b4717dc36a1c6cbc93ee153b500", "versionType": "git"}, {"status": "affected", "version": "8e50d392652f20616a136165dff516b86baf5e49", "lessThan": "6df0e6c57dfc064af330071f372f11aa8c584997", "versionType": "git"}], "programFiles": ["drivers/dma/idxd/device.c", "drivers/dma/idxd/idxd.h", "drivers/dma/idxd/init.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"status": "unaffected", "version": "0", "lessThan": "5.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.11.16", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/dma/idxd/device.c", "drivers/dma/idxd/idxd.h", "drivers/dma/idxd/init.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500"}, {"url": "https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: clear MSIX permission entry on shutdown\n\nAdd disabling/clearing of MSIX permission entries on device shutdown to\nmirror the enabling of the MSIX entries on probe. Current code left the\nMSIX enabled and the pasid entries still programmed at device shutdown."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.11.16", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12", "versionStartIncluding": "5.11"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:00:20.114Z"}}}, "cveMetadata": {"cveId": "CVE-2021-46918", "state": "PUBLISHED", "dateUpdated": "2025-05-04T07:00:20.114Z", "dateReserved": "2024-02-25T13:45:52.719Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-27T06:53:56.082Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3C5242B9-B5BD-4578-AD66-69DF59D54A14", "versionEndExcluding": "5.11.16", "versionStartIncluding": "5.11.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: clear MSIX permission entry on shutdown\n\nAdd disabling/clearing of MSIX permission entries on device shutdown to\nmirror the enabling of the MSIX entries on probe. Current code left the\nMSIX enabled and the pasid entries still programmed at device shutdown."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: dmaengine: idxd: borrar entrada de permiso MSIX al apagar Agregue la desactivaci\u00f3n/borrado de entradas de permiso MSIX al apagar el dispositivo para reflejar la habilitaci\u00f3n de las entradas MSIX en la sonda. El c\u00f3digo actual dej\u00f3 el MSIX habilitado y las entradas pasivas a\u00fan programadas al apagar el dispositivo."}], "id": "CVE-2021-46918", "lastModified": "2024-11-21T06:34:55.823", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-02-27T07:15:08.540", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500"}], "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: MSIX permission entry on shutdown", "id": "2266373", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266373"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndmaengine: idxd: clear MSIX permission entry on shutdown\nAdd disabling/clearing of MSIX permission entries on device shutdown to\nmirror the enabling of the MSIX entries on probe. Current code left the\nMSIX enabled and the pasid entries still programmed at device shutdown.", "A flaw was found in the Linux Kernel. The current code leaves the MSIX enabled and the pasid entries still programmed at device shutdown. Add disabling/clearing of MSIX permission entries on device shutdown to mirror the enabling of the MSIX entries on probe."], "name": "CVE-2021-46918", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2021-46918\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-46918\nhttps://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997\nhttps://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500"], "threat_severity": "Low"}