CVE-2021-46966 - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

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.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

References

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

History

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'}`

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-02-27T18:47:03.631Z

Updated: 2024-11-04T11:56:48.746Z

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

Link: CVE-2021-46966

Vulnrichment

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

NVD

Status : Awaiting Analysis

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

Modified: 2024-02-28T14:06:45.783

Link: CVE-2021-46966

Redhat

Severity : Low

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

Links: CVE-2021-46966 - Bugzilla

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