Ubuntu.comUB:CVE-2021-45868CVE-2021-45868
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
37.0%
In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate
the block number in the quota tree (on disk). This can, for example, lead
to a kernel/locking/rwsem.c use-after-free if there is a corrupted quota
file.
Bugs
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < 4.15.0-167.175 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < 5.4.0-97.110 | UNKNOWN |
| ubuntu | 21.10 | noarch | linux | < 5.13.0-28.31 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | < 4.4.0-239.273) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < 4.15.0-1119.127 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1064.67 | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-aws | < 5.13.0-1012.13 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1117.123) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1155.170) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws-5.13 | < 5.13.0-1012.13~20.04.1 | UNKNOWN |
References
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.3
git.kernel.org/linus/9bf3d20331295b1ecb81f4ed9ef358c51699a050
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9bf3d20331295b1ecb81f4ed9ef358c51699a050
launchpad.net/bugs/cve/CVE-2021-45868
nvd.nist.gov/vuln/detail/CVE-2021-45868
security-tracker.debian.org/tracker/CVE-2021-45868
ubuntu.com/security/notices/USN-6001-1
ubuntu.com/security/notices/USN-6013-1
ubuntu.com/security/notices/USN-6014-1
www.cve.org/CVERecord?id=CVE-2021-45868
www.openwall.com/lists/oss-security/2022/03/17/1
www.openwall.com/lists/oss-security/2022/03/17/2
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
37.0%