CVE-2021-47466 - Vulnerability Details

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources.

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
Redhat	Enterprise Linux

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc3::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc4::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc5::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc6::::::

Package	CPE	Advisory	Released Date
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10	cpe:/a:redhat:enterprise_linux:8::nfv	RHSA-2024:7001	2024-09-24T00:00:00Z
kernel-0:4.18.0-553.22.1.el8_10	cpe:/o:redhat:enterprise_linux:8	RHSA-2024:7000	2024-09-24T00:00:00Z

References

Link	Providers
https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f
https://git.kernel.org/stable/c/4f5d1c29cfab5cb0ab885059818751bdef32e2bb
https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930
https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461
https://lore.kernel.org/linux-cve-announce/2024052227-CVE-2021-47466-ff03@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47466
https://www.cve.org/CVERecord?id=CVE-2021-47466

History

Tue, 07 Jan 2025 20:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		CWE-401
CPEs		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:5.15:rc1:::::: cpe:2.3:o:linux:linux_kernel:5.15:rc2:::::: cpe:2.3:o:linux:linux_kernel:5.15:rc3:::::: cpe:2.3:o:linux:linux_kernel:5.15:rc4:::::: cpe:2.3:o:linux:linux_kernel:5.15:rc5:::::: cpe:2.3:o:linux:linux_kernel:5.15:rc6::::::
Vendors & Products		Linux Linux linux Kernel
Metrics	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'}`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

Mon, 04 Nov 2024 12:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 24 Sep 2024 11:15:00 +0000

Type	Values Removed	Values Added
CPEs		cpe:/o:redhat:enterprise_linux:8

Tue, 24 Sep 2024 06:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Redhat Redhat enterprise Linux
CPEs		cpe:/a:redhat:enterprise_linux:8::nfv
Vendors & Products		Redhat Redhat enterprise Linux

Thu, 12 Sep 2024 08:30:00 +0000

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 11 Sep 2024 13:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-22T06:23:25.674Z

Updated: 2025-05-04T07:11:35.715Z

Reserved: 2024-05-22T06:20:56.198Z

Link: CVE-2021-47466

Vulnrichment

Updated: 2024-08-04T05:39:59.454Z

NVD

Status : Analyzed

Published: 2024-05-22T07:15:11.450

Modified: 2025-01-07T20:13:41.913

Link: CVE-2021-47466

Redhat

Severity : Moderate

Publid Date: 2024-05-22T00:00:00Z

Links: CVE-2021-47466 - Bugzilla

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{"affected_release": [{"advisory": "RHSA-2024:7001", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}], "bugzilla": {"description": "kernel: mm, slub: fix potential memoryleak in kmem_cache_open()", "id": "2282890", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282890"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm, slub: fix potential memoryleak in kmem_cache_open()\nIn error path, the random_seq of slub cache might be leaked. Fix this\nby using __kmem_cache_release() to release all the relevant resources.", "A potential memory leak was found in the Linux kernel, in kmem_cache_open(). This issue may lead to compromised system availability."], "name": "CVE-2021-47466", "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: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": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47466\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47466\nhttps://lore.kernel.org/linux-cve-announce/2024052227-CVE-2021-47466-ff03@gregkh/T"], "threat_severity": "Moderate"}

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

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