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ubuntucveUbuntu.comUB:CVE-2018-16862
HistoryNov 26, 2018 - 12:00 a.m.

CVE-2018-16862

2018-11-2600:00:00
ubuntu.com
ubuntu.com
21

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

26.5%

A security flaw was found in the Linux kernel in a way that the cleancache
subsystem clears an inode after the final file truncation (removal). The
new file created with the same inode may contain leftover pages from
cleancache and the old file data instead of the new one.

Bugs

Notes

Author Note
tyhicks Only affects Ubuntu kernels running under Xen which use the tmem driver
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-58.64UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-142.168UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1047.49UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1038.41UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1075.85UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1047.49~16.04.1UNKNOWN
ubuntu18.04noarchlinux-azure< 5.0.0-1014.14~18.04.1UNKNOWN
ubuntu16.04noarchlinux-azure< 4.15.0-1055.60UNKNOWN
ubuntu18.04noarchlinux-azure-edge< 5.0.0-1014.14~18.04.1UNKNOWN
ubuntu16.04noarchlinux-azure-edge< 4.15.0-1055.60UNKNOWN
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CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

26.5%