CVE-2021-46923 - Vulnerability Details - OpenCVE

ReportizFlow

In the Linux kernel, the following vulnerability has been resolved: fs/mount_setattr: always cleanup mount_kattr Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

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/012e332286e2bb9f6ac77d195f17e74b2963d663
https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d
https://lore.kernel.org/linux-cve-announce/2024022745-CVE-2021-46923-a1ec@gregkh/T/#u
https://nvd.nist.gov/vuln/detail/CVE-2021-46923
https://www.cve.org/CVERecord?id=CVE-2021-46923

History

No history.

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-02-27T09:43:54.159Z

Updated: 2024-12-19T07:31:53.617Z

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

Link: CVE-2021-46923

Vulnrichment

Updated: 2024-08-04T05:17:43.009Z

NVD

Status : Modified

Published: 2024-02-27T10:15:07.100

Modified: 2024-11-21T06:34:56.550

Link: CVE-2021-46923

Redhat

Severity : Low

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

Links: CVE-2021-46923 - Bugzilla

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-46923", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:45:52.719Z", "datePublished": "2024-02-27T09:43:54.159Z", "dateUpdated": "2024-12-19T07:31:53.617Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T07:31:53.617Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/mount_setattr: always cleanup mount_kattr\n\nMake sure that finish_mount_kattr() is called after mount_kattr was\nsuccesfully built in both the success and failure case to prevent\nleaking any references we took when we built it. We returned early if\npath lookup failed thereby risking to leak an additional reference we\ntook when building mount_kattr when an idmapped mount was requested."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/namespace.c"], "versions": [{"version": "9caccd41541a6f7d6279928d9f971f6642c361af", "lessThan": "47b5d0a7532d39e42a938f81e3904268145c341d", "status": "affected", "versionType": "git"}, {"version": "9caccd41541a6f7d6279928d9f971f6642c361af", "lessThan": "012e332286e2bb9f6ac77d195f17e74b2963d663", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/namespace.c"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.13", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d"}, {"url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663"}], "title": "fs/mount_setattr: always cleanup mount_kattr", "x_generator": {"engine": "bippy-5f407fcff5a0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-46923", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-05T16:15:38.368509Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:22:08.089Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:43.009Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:43.009Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-46923", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-05T16:15:38.368509Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T15:20:41.319Z"}}], "cna": {"title": "fs/mount_setattr: always cleanup mount_kattr", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9caccd41541a6f7d6279928d9f971f6642c361af", "lessThan": "47b5d0a7532d39e42a938f81e3904268145c341d", "versionType": "git"}, {"status": "affected", "version": "9caccd41541a6f7d6279928d9f971f6642c361af", "lessThan": "012e332286e2bb9f6ac77d195f17e74b2963d663", "versionType": "git"}], "programFiles": ["fs/namespace.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"status": "unaffected", "version": "0", "lessThan": "5.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.13", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/namespace.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d"}, {"url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663"}], "x_generator": {"engine": "bippy-5f407fcff5a0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/mount_setattr: always cleanup mount_kattr\n\nMake sure that finish_mount_kattr() is called after mount_kattr was\nsuccesfully built in both the success and failure case to prevent\nleaking any references we took when we built it. We returned early if\npath lookup failed thereby risking to leak an additional reference we\ntook when building mount_kattr when an idmapped mount was requested."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T07:31:53.617Z"}}}, "cveMetadata": {"cveId": "CVE-2021-46923", "state": "PUBLISHED", "dateUpdated": "2024-12-19T07:31:53.617Z", "dateReserved": "2024-02-25T13:45:52.719Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-27T09:43:54.159Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9E1109BB-1C98-497B-8CBA-EA69276884AD", "versionEndExcluding": "5.15.13", "versionStartIncluding": "5.12.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/mount_setattr: always cleanup mount_kattr\n\nMake sure that finish_mount_kattr() is called after mount_kattr was\nsuccesfully built in both the success and failure case to prevent\nleaking any references we took when we built it. We returned early if\npath lookup failed thereby risking to leak an additional reference we\ntook when building mount_kattr when an idmapped mount was requested."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/mount_setattr: limpiar siempre mount_kattr. Aseg\u00farese de que se llame a finish_mount_kattr() despu\u00e9s de que mount_kattr se haya compilado con \u00e9xito tanto en el caso de \u00e9xito como en el de fracaso para evitar que se filtren las referencias que tomamos cuando lo compilamos. Regresamos temprano si falla la b\u00fasqueda de ruta, por lo que corremos el riesgo de filtrar una referencia adicional que tomamos al compilar mount_kattr cuando se solicit\u00f3 un montaje con idmapped."}], "id": "CVE-2021-46923", "lastModified": "2024-11-21T06:34:56.550", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}]}, "published": "2024-02-27T10:15:07.100", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-668"}], "source": "[email protected]", "type": "Primary"}]}