In the Linux kernel, the following vulnerability has been resolved:

ACPI: custom_method: fix potential use-after-free issue

In cm_write(), buf is always freed when reaching the end of the
function. If the requested count is less than table.length, the
allocated buffer will be freed but subsequent calls to cm_write() will
still try to access it.

Remove the unconditional kfree(buf) at the end of the function and
set the buf to NULL in the -EINVAL error path to match the rest of
function.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00087.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*:*

No data.

No data.

Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-6739-1 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394 cve-icon cve-icon
https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203 cve-icon cve-icon
https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b cve-icon cve-icon
https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be cve-icon cve-icon
https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23 cve-icon cve-icon
https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17 cve-icon cve-icon
https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234 cve-icon cve-icon
https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa cve-icon cve-icon
https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024022720-CVE-2021-46966-1469@gregkh/T/#u cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-46966 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-46966 cve-icon
History

Fri, 06 Dec 2024 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-04T12:40:40.314Z

Reserved: 2024-02-27T18:42:55.943Z

Link: CVE-2021-46966

cve-icon Vulnrichment

Updated: 2024-08-04T05:17:42.993Z

cve-icon NVD

Status : Analyzed

Published: 2024-02-27T19:04:07.127

Modified: 2024-12-06T17:55:15.673

Link: CVE-2021-46966

cve-icon Redhat

Severity : Low

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

Links: CVE-2021-46966 - Bugzilla

cve-icon OpenCVE Enrichment

No data.