CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
10.1%
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles
access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing
local users to write data into holes in a tmpfs file (if the user has
read-only access to that file, and that file contains holes), related to
fs/userfaultfd.c and mm/userfaultfd.c.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | <Β 4.15.0-46.49 | UNKNOWN |
ubuntu | 18.10 | noarch | linux | <Β 4.18.0-16.17 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | <Β 4.15.0-1033.35 | UNKNOWN |
ubuntu | 18.10 | noarch | linux-aws | <Β 4.18.0-1011.13 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws-hwe | <Β 4.15.0-1033.35~16.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure | <Β 4.18.0-1013.13~18.04.1 | UNKNOWN |
ubuntu | 18.10 | noarch | linux-azure | <Β 4.18.0-1013.13 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-azure | <Β 4.15.0-1040.44~14.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-azure | <Β 4.15.0-1040.44 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-edge | <Β 4.18.0-1013.13~18.04.1 | UNKNOWN |
launchpad.net/bugs/cve/CVE-2018-18397
lore.kernel.org/lkml/[email protected]/
nvd.nist.gov/vuln/detail/CVE-2018-18397
security-tracker.debian.org/tracker/CVE-2018-18397
ubuntu.com/security/notices/USN-3901-1
ubuntu.com/security/notices/USN-3901-2
ubuntu.com/security/notices/USN-3903-1
ubuntu.com/security/notices/USN-3903-2
www.cve.org/CVERecord?id=CVE-2018-18397
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
10.1%