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ubuntucveUbuntu.comUB:CVE-2021-3492
HistoryApr 15, 2021 - 12:00 a.m.

CVE-2021-3492

2021-04-1500:00:00
ubuntu.com
ubuntu.com
25
shiftfs
ubuntu linux
kernel memory exhaustion
privilege escalation
zdi-can-13562

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

8.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

17.9%

JSON

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux
kernels, did not properly handle faults occurring during copy_from_user()
correctly. These could lead to either a double-free situation or memory not
being freed at all. An attacker could use this to cause a denial of service
(kernel memory exhaustion) or gain privileges via executing arbitrary code.
AKA ZDI-CAN-13562.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-72.80UNKNOWN
ubuntu20.10noarchlinux< 5.8.0-50.56UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1045.47UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1030.32UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1045.47~18.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1046.48UNKNOWN
ubuntu20.10noarchlinux-azure< 5.8.0-1029.31UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1046.48~18.04.1UNKNOWN
ubuntu20.04noarchlinux-azure-fde< 5.4.0-1046.48UNKNOWN
ubuntu20.04noarchlinux-bluefield< 5.4.0-1011.14UNKNOWN
Rows per page:
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CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

8.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

17.9%

JSON
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