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ubuntucveUbuntu.comUB:CVE-2021-28964
HistoryMar 22, 2021 - 12:00 a.m.

CVE-2021-28964

2021-03-2200:00:00
ubuntu.com
ubuntu.com
28

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

1.9 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

13.3%

A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the
Linux kernel through 5.11.8. It allows attackers to cause a denial of
service (BUG) because of a lack of locking on an extent buffer before a
cloning operation, aka CID-dbcc7d57bffc.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-144.148UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-74.83UNKNOWN
ubuntu20.10noarchlinux< 5.8.0-55.62UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-223.256) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1103.110UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1049.51UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1035.37UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1103.108) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1139.153) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1049.51~18.04.1UNKNOWN
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4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

1.9 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

13.3%