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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < 4.15.0-144.148 | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < 5.4.0-74.83 | UNKNOWN |
ubuntu | 20.10 | noarch | linux | < 5.8.0-55.62 | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < 4.4.0-223.256) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < 4.15.0-1103.110 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1049.51 | UNKNOWN |
ubuntu | 20.10 | noarch | linux-aws | < 5.8.0-1035.37 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1103.108) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1139.153) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < 5.4.0-1049.51~18.04.1 | UNKNOWN |
git.kernel.org/linus/dbcc7d57bffc0c8cac9dac11bec548597d59a6a5
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbcc7d57bffc0c8cac9dac11bec548597d59a6a5
launchpad.net/bugs/cve/CVE-2021-28964
nvd.nist.gov/vuln/detail/CVE-2021-28964
security-tracker.debian.org/tracker/CVE-2021-28964
ubuntu.com/security/notices/USN-4948-1
ubuntu.com/security/notices/USN-4979-1
ubuntu.com/security/notices/USN-4982-1
ubuntu.com/security/notices/USN-4984-1
ubuntu.com/security/notices/USN-5361-1
www.cve.org/CVERecord?id=CVE-2021-28964
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%