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ubuntucveUbuntu.comUB:CVE-2021-44733
HistoryDec 22, 2021 - 12:00 a.m.

CVE-2021-44733

2021-12-2200:00:00
ubuntu.com
ubuntu.com
18

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

46.0%

JSON

A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in
the Linux kernel through 5.15.11. This occurs because of a race condition
in tee_shm_get_from_id during an attempt to free a shared memory object.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-173.182UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-105.119UNKNOWN
ubuntu21.10noarchlinux< 5.13.0-37.42UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1124.133UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1069.73UNKNOWN
ubuntu21.10noarchlinux-aws< 5.13.0-1019.21UNKNOWN
ubuntu20.04noarchlinux-aws-5.13< 5.13.0-1019.21~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1069.73~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1124.133~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1073.76UNKNOWN
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7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

46.0%

JSON
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