Ubuntu.comUB:CVE-2021-4148CVE-2021-4148
4.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.3 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%
A vulnerability was found in the Linux kernel’s block_invalidatepage in
fs/buffer.c in the filesystem. A missing sanity check may allow a local
attacker with user privilege to cause a denial of service (DOS) problem.
Bugs
- <https://bugzilla.redhat.com/show_bug.cgi?id=2026487>
- <https://bugzilla.suse.com/show_bug.cgi?id=1193983>
Notes
| Author | Note |
|---|---|
| sbeattie | reproducer links in second lore email |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-aws | < 5.13.0-1012.13 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws-5.13 | < 5.13.0-1012.13~20.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < any | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-azure | < 5.13.0-1013.15 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure-5.13 | < 5.13.0-1013.15~20.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-bluefield | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gcp | < any | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-gcp | < 5.13.0-1013.16 | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2021-4148
lkml.org/lkml/2021/9/12/323
lkml.org/lkml/2021/9/17/1037
lore.kernel.org/linux-mm/[email protected]/
lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
lore.kernel.org/lkml/CAHbLzkrdGva2dzO36r62LKv_ip5trbMK0BO3vCeSBk2_7OE-zA@mail.gmail.com/
nvd.nist.gov/vuln/detail/CVE-2021-4148
security-tracker.debian.org/tracker/CVE-2021-4148
www.cve.org/CVERecord?id=CVE-2021-4148
Related
4.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.3 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%